What is the course of metallography and what is its use?

As we all know, what is the course of metal phase diagram? Someone asked what is the degree of freedom of binary metal phase diagram? In addition, some people want to ask how to look at the alloy phase diagram. Do you know what this is about? In fact, metallography of metal materials, let's take a look at what metallography is for, I hope it will help everyone!

What is a metal phase diagram? The metal phase diagram of this course is used to display and analyze the metallographic structure of metals.

The mechanical properties of metals with the same composition will be significantly different if the metallographic structure is different.

Why don't you pay much attention to the existence of biphase diagram in metallurgical process, and only consider cementite instead of graphite?

Metallurgical course knowledge explains the basic knowledge concepts of metallurgical principle and phase diagram to ordinary undergraduate students. Therefore, knowledge explains the most basic theory. If we consider the problem of graphite in Fe-C phase diagram, someone must have studied it, and knowledge only appears in the form of published papers.

The function of teaching is to teach the public to understand and master the principles and methods, and the subsequent exploration and thinking need personal control.

What is the course of metal phase diagram? What is the degree of freedom in binary metal phase diagram? Degree of freedom f = number of parts-number of phases+2;

Two-component metal phase diagram, then f = 2 phases +2 = 4 phases.

The degree of freedom f is that when the system is in equilibrium, the phase number is not changed,

Factors that can be changed independently (such as temperature and pressure), the number of these variables is called degrees of freedom.

What is metallography?

Metallography is a micrograph of a sample used for metallographic analysis.

Metallographic analysis is one of the important means of experimental research on metal materials. Based on the principle of quantitative metallography, the worn surface or thin film of two-dimensional metallographic specimen is measured and calculated by metallographic microscope, and the three-dimensional spatial morphology of the alloy is determined, so as to establish the quantitative relationship between alloy composition and properties. The application of computer in image processing has the advantages of high precision and high speed, which can greatly improve the work efficiency.

Computer quantitative metallographic analysis is gradually becoming a powerful tool for people to analyze and study various materials, establish the quantitative relationship between the microstructure and various properties of materials, and study the phase transformation dynamics of materials. By using computer image analysis system, various parameters such as area percentage, average size, average spacing, length-width ratio and so on can be measured conveniently. Characteristics, and then determine the three-dimensional shape, quantity, size and distribution of the characteristics according to these parameters, and establish an internal relationship with the mechanical properties of materials, thus providing reliable data for more scientific evaluation and rational use of materials.

What is the course of metal phase diagram? What do you think of the alloy phase diagram? What is metal technology?

Teaching outline of metal technology

Metal technology

Course number: applicable major: mechanical design, manufacturing and automation hours: 44 credits: 2

First, the content introduction

The main teaching content of this course is the basis of hot working technology, including the main properties of metal materials, the selection of common engineering materials, the basic principles and technological characteristics of casting, forging and welding, the selection of blanks and the analysis of structural manufacturability, and the introduction of new materials, new technologies and new processes.

Second, the purpose and task of this course

This course is an important technical basic course for mechanical design and manufacturing specialty. On the basis of metalworking practice, through the study of this course, students can often use the basic knowledge of engineering materials and material forming, cultivate their preliminary process analysis ability, and lay the necessary foundation for studying other related courses and engaging in mechanical design and manufacturing in the future.

The task of this course (1) is familiar with the types, brands and properties of commonly used engineering materials, and has the preliminary ability to select engineering materials; (2) Master the basic principles and process characteristics of main processing methods, and have the ability of preliminary blank selection and process analysis; (3) Understand the new materials, new processes, new technologies and development trends related to this course.

Thirdly, the relationship between this course and other courses.

Students should have taken the following courses before taking this course: (1) Introduction to College Chemistry; (2) college physics; (3) mechanical drawing; And you must complete the metalworking practice first.

After the completion of this course, you can enter the learning stage of subsequent courses; (1) mechanical engineering materials: (2) mechanical design; (3) the technical basis of mechanical manufacturing, etc.

This course plays an irreplaceable role in cultivating students' comprehensive quality, practical ability, innovative consciousness and innovative spirit, and students should pay enough attention to this course.

Fourth, the basic requirements of this course

Through the study of this course, students can master the basic theory and knowledge of metal technology, initially have the ability to apply the basic knowledge of metal technology, initially have the ability to use what they have learned to analyze and solve practical problems, and have a sense of innovation.

Verb (abbreviation for verb) course content

● Theoretical teaching content

Introduction (1 class)

Chapter I Engineering Materials (13 class hours)

Familiar with the main properties of metal materials; Understand the crystal structure and crystallization of metals and alloys; Familiar with iron-carbon alloy phase diagram; Familiar with heat treatment process of steel; Familiar with the types, properties, characteristics and applications of commonly used mechanical engineering materials.

Chapter II Foundry (10 class hour)

Familiar with the casting properties of alloy and its influence on casting quality; Understand the melting and casting characteristics of commonly used casting alloys; Master the characteristics and application of sand casting and common special casting methods; Have the preliminary ability of casting structure design, and understand the new casting technology, new process and its development trend.

Chapter III Pressure Processing (8 class hours)

Familiar with the law of metal plastic deformation and its influence on properties; Master the characteristics and application of free forging and die forging; Master the characteristics and basic technology of sheet metal stamping; Understand the advanced pressure processing methods and development trends.

Chapter IV (8 class hours)

Familiar with the characteristics and application of common methods such as fusion welding; Familiar with the causes of stress, deformation and cracks and their effects on quality; Understand the properties of common metal materials; Familiar with the main principles of structural design; Understand new technologies, new processes and their development trends.

The fifth chapter blank selection (4 hours)

Familiar with the characteristics and application of all kinds of blanks; Understand the cost and quality of blank; Have the preliminary ability to select air.

● Practical teaching content

In order to meet the needs of theoretical teaching and strengthen practical teaching, metalworking experiment and metalworking practice are gradually integrated, and comprehensive and designed experiments are set up in combination with metalworking practice.

Six, teaching materials and reference books

1, textbook

Metal Technology, edited by He Sha, was published by Harbin Engineering University Press in August this year.

2. Main reference books

Metal Technology, edited by Deng, Higher Education Press, June 2008.

Metal technology, Yuan, editor-in-chief, Industrial Press, June 2008.

Seven. Teaching methods of this course

The characteristics of this course are practicality and comprehensiveness, and it is closely related to specialized courses. Its teaching methods should pay attention to inspiration and guidance, be good at summing up and integrating theory with practice, cultivate students' ability to actively acquire knowledge and innovative thinking, arrange classroom discussion and comprehensive homework in the teaching process, and make full use of teaching methods, intuitive teaching and multimedia metalworking CAI.

Eight, the allocation of class hours in each teaching link

Chapter II Subtotal of Class Discussion.

Introduction 1 1

Chapter III 88

The fourth chapter 88

Nine, the implementation of the outline should pay attention to the problem.

1. This course is closely related to production practice, and requires high practical basis for students. In order to meet the basic requirements of learning, metalworking practice must be completed before studying this course.

2. For the specialty of mechanical design and manufacturing, the basic aspects of mechanical manufacturing technology should be emphasized in the subsequent professional courses. In order to avoid repetition, this course mainly teaches the basic aspects of engineering materials and thermal processing technology.

Basic teaching syllabus of mechanical manufacturing

Mechanical Manufacturing Foundation

Of course not. Applicable Major: Metal Material Engineering Hours: 28 credits: 2

First, the content introduction

Selection of machining blank; Basic knowledge of metal cutting principle and theory; Fundamentals of metal cutting machine tools: technological characteristics and applications of various processing methods; Brief introduction of common finishing and special processing methods; Manufacturability of cutting parts; The basic knowledge of parts processing technology is expounded.

Second, the purpose and task of this course

Mechanical manufacturing foundation is an important technical basic course for engineering majors in colleges and universities. It studies the technological methods of manufacturing mechanical parts; The regularity of various technological methods and their application and relationship in mechanical manufacturing; Processing technology and structural manufacturability of mechanical parts; Influence of common material properties on processing technology and comprehensive comparison of processing methods. It enables students to understand the whole process of mechanical manufacturing; Basic knowledge of common processing technology; It lays a good foundation for the study of subsequent courses, the implementation of various practical teaching and future work. Make students have practical working ability and pioneering and innovative spirit.

Thirdly, the relationship between this course and other courses.

This course is a practical technical basic course and should be taught after engineering training. Through engineering training, students can understand the material selection of metal parts, the processing technology of blanks and parts, the working principle of common equipment and tools, and receive certain operation skills training. Before studying this course, students should have basic knowledge of physics, theoretical mechanics, material mechanics, mechanical design foundation, material science and so on. As a basic technical course, it has laid a good technical and practical foundation for many professional courses.

Fourth, the basic requirements of this course

Through the study of this course, students are required to understand the general phenomena and laws in metal cutting process, have the ability to choose cutting parameters according to machining conditions, and can solve practical problems in production. Understand the working principle, structure and processing range of various machine tools. Master the technological characteristics of various processing methods. Familiar with the technical requirements and process of typical parts.

Have the ability to judge the structural manufacturability of general parts and initially formulate process regulations.

Verb (abbreviation for verb) course content

Theoretical teaching content

Chapter 1 Introduction and Blank Selection (3 hours)

Familiar with the brand and performance of common metal materials; Characteristics and applications of various blanks; The cost and quality of the blank; Blank selection.

Chapter II Basic Knowledge of Metal Cutting (8 hours)

Cutting motion and cutting elements; Materials and structures; Metal cutting process; Cutting economy.

Chapter III Basic knowledge of metal cutting machine tools (3 hours)

Type and structure of machine tools; Transmission of machine tools; Analysis of transmission system of common lathe.

Chapter IV Common Cutting Methods (6 hours)

Turning processing; Drilling and boring; Planing and broaching; Grinding; Grinding processing; Gear tooth profile machining.

Chapter V Precision Machining and Special Machining (2 hours)

Finishing; Special treatment.

Chapter VI Structural Design of Machining Parts (2 hours)

Basic principles of structural design; Structural requirements of parts.

Chapter VII Basic knowledge of machining technology (4 hours)

Explain the basic knowledge of process flow; Installation and fixation of workpieces; Illustrate the machining process of parts with examples.

Six, teaching materials and reference books

Metal Technology (4th Edition) Volume II, edited by Deng, Higher Education Press.

Huang Guangyu, editor-in-chief of Mechanical Manufacturing Engineering

Introduction to metal cutting machine tools edited by Jia Asia Machinery Industry Press

Seven. Teaching methods of this course

This course focuses on classroom teaching, and comprehensively uses advanced teaching methods such as CAI. While imparting knowledge, we should pay attention to skill training and improve students' practical work ability.

VIII. Allocation of Teaching Hours

Subtotal of chapter teaching

Introduction, chapter 1 33

Chapter II 88

Chapter III 33

The fourth chapter 66

Chapter 5 22

Chapter VI 22

Chapter VII 44

Nine, the implementation of the outline should pay attention to the problem.

Due to the lack of class hours, lectures should be concise, and some reference books for extracurricular reading should be pointed out to students, some of which can be completed by students themselves.

Teaching outline of "engineering training"

engineering practice

Of course not. Applicable Major: Mechanical Major Hours: Credits:

First, the nature and tasks of the course:

1. The nature of the course

Engineering training is a very practical technical basic course, and it is also an important compulsory course for mechanical students to learn the basic process methods of mechanical manufacturing, complete the basic engineering training and cultivate engineering quality. Engineering training focuses on practical teaching, and students must operate independently. On the premise of ensuring the implementation of the basic requirements of teaching, teaching should be combined with production as much as possible.

2. Task of the course

Understand the general process of mechanical manufacturing. Familiar with the common machining methods of mechanical parts, the working principle and typical mechanism of the main equipment used, fixture measuring tools and safe operation technology. Understand the basic process knowledge of mechanical manufacturing and the application of some new processes and technologies in mechanical manufacturing; Ability to conduct process analysis and select processing methods for simple parts. In the main types of work, you should have the practical ability to independently complete the processing and manufacturing of simple parts; Cultivate labor viewpoint, innovative spirit and scientific style of integrating theory with practice. Initially establish the engineering consciousness of market, information, quality, cost, benefit, safety and environmental protection.

Second, the basic content of teaching:

(1) casting

1, basic knowledge

Familiar with casting production process, characteristics and application; Understand molding sand, core sand, modeling, core making, matching, melting, pouring, sand dropping, cleaning and common casting defects. Familiar with the selection of casting parting surface. Master the characteristics and application of manual two-box modeling (integral mold, parting mold, sand digging, loose block, etc.). ). Understand the characteristics and applications of three-box modeling and scraper modeling. Understand the characteristics and application of common special casting methods. Understand the safety technology and environmental protection of foundry production, and can make simple economic analysis.

2. Basic skills

Master the operation skills of manual two-box modeling, and be able to make a preliminary process analysis of castings.

(2) Forging

1, basic knowledge

Familiar with forging production process, characteristics and application; Understand billet heating, forging temperature range of non-alloy steel and free forging equipment. Master the characteristics of basic process of free forging. Understand the free forging process of shaft and disc sleeve forgings. Understand the cooling of forgings and common forging defects; Understand the characteristics of tire die forging and tire die structure; Understand punch, die and common stamping defects. Familiar with basic stamping process; Understand the safety technology and environmental protection of forging production, and be able to conduct simple economic analysis.

2. Basic skills

Master the operation skills of free forging and sheet metal stamping, and be able to make a preliminary process analysis of free forging and stamping parts.

(3)

1, basic knowledge

Familiar with production technology, characteristics and application; Understand the types and main technical parameters of covered electrode arc welding machine, welding covered electrode, joint type, groove type and the characteristics of different spatial positions. Familiar with process parameters and their influence on quality. Understand common defects; Understand the role of gas welding equipment, gas welding flame and flux; Understand the characteristics and applications of other commonly used methods; Familiar with oxygen cutting principle, technology and metal gas cutting conditions. Understand the characteristics and application of plasma arc cutting; Understand safety production technology and environmental protection, and be able to conduct simple economic analysis.

2. Basic skills

Can correctly select the current and adjust the flame. Master the flat welding operation of covered electrode arc welding and gas welding.

(4) heat treatment

Understand the heat treatment function of steel, common heat treatment methods and equipment.

(5) Machining

1, basic knowledge

Understand the basic knowledge of metal cutting; Know the model of lathe, and be familiar with the composition, movement, transmission system and use of lathe; Familiar with the composition and structure of common turning tools, the main angles of turning tools and their functions. Understand the material properties and requirements of common materials; Understand the characteristics of clamping mode of shaft and disk sleeve parts and the general structure and usage of common accessories; Master the method of turning outer circle, turning end face, drilling and turning hole; Understand the turning method of turning groove, turning break, conical surface, forming surface and thread; Understand the composition, movement and use of commonly used milling machines, planers and grinders. Understand the general structure, use and simple indexing method of its commonly used and accessories; Familiar with milling and grinding methods. This paper introduces the methods of planing and ordinary tooth profile machining, and understands the characteristics and applications of ordinary special machining methods. Familiar with the composition, processing characteristics and application of CNC machine tools; Understand the dimensional tolerance level, the range of surface roughness ra value and its measurement method that can be achieved by common cutting methods; Understand machining safety technology, and be able to make simple economic analysis.

2. Basic skills

Master lathe operation skills, correctly use tools, fixtures and measuring tools according to the requirements of parts processing, and independently complete the turning of simple parts; Familiar with the operation methods of milling machine and grinder; Able to program and operate CNC wire cutting machine tools and CNC lathes; Be able to carry out preliminary process analysis on simple machined workpieces.

(6) fitter

1, basic knowledge

Familiar with the role of locksmith in machinery manufacturing and maintenance; Master the methods and applications of scribing, sawing, filing, drilling, tapping and tapping; Understand the method and application of scraping; Understand the composition, movement and use of drilling rig. Understand the methods of reaming, reaming and boring; Understand the basic knowledge of mechanical parts assembly.

2. Basic skills

Master the usage of common tools and measuring tools used by locksmith. Able to complete fitter parts independently; Have simple parts assembly and disassembly skills.

Three. Outline description:

1, and the proportion of engineering training time is: casting, forging and training time1/3; Turn training time accounts for1/3; Training time of milling workers, planers and grinders accounts for1/6; Fitter training time accounts for 1/6.

Metallographic diagram of metal material 2. We should actively create conditions to enrich the teaching content of new technologies and new processes.

3. In the process of engineering training, experiments, on-site teaching, visits, multimedia teaching, audio-visual teaching, discussion, writing small papers, writing practice reports and other ways and means can be used to enrich the teaching content and cultivate students' ability to analyze and solve problems and innovative spirit.

4. Interpretation of the formation of cognitive levels in Basic Requirements for Teaching:

Understanding: refers to a preliminary and general understanding of knowledge.

Familiarity: refers to a deeper understanding of knowledge and the ability to initially use knowledge.

Proficiency: refers to a specific and in-depth understanding of knowledge and a certain ability to analyze and apply.

The above is related to what the metal phase diagram is used for. What is the degree of freedom in binary metal phase diagram? Share. I watched the course of metal phase diagram, I hope this will help everyone!