金属工艺(金属热处理)(Metal process (metal heat treatment)).doc
《金属工艺(金属热处理)(Metal process (metal heat treatment)).doc》由会员分享,可在线阅读,更多相关《金属工艺(金属热处理)(Metal process (metal heat treatment)).doc(10页珍藏版)》请在三一文库上搜索。
1、金属工艺(金属热处理)(Metal process (metal heat treatment))One, radio:1, fine car castings, mainly to improve the surface quality and reduce the tool wear, should be selected without cutting fluid or kerosene.2, high speed precision aluminum alloy tool selection tool materials for K01, W18Cr4V, W6Mo5Cr4V2.3,
2、the minimum cutting force is the back force Fp, the largest is the cutting force Fc4, cutting the workpiece, whether rough machining or finishing processing should be selected large values are: cutting depth AP5. The failure area of welding interface appears in the fusion zone or overheated zone dur
3、ing the welding process of steel structure6, coin manufacturing method: stamping7, commonly used in large and medium batch production and automatic production of forgings heating applicable heating method: induction heating furnace8. The shape of the final forging is suitable for the forging, but wh
4、at is bigger than the forging: the cooling shrinkage9, when the three directions of the compressive stress increases, the deformation resistance of the forging change: increase10. What is the work hardening phenomenon in metal material processing: with the plastic change increasing, the metal hardne
5、ss increases, the plasticity and toughness decrease, and the annealing method should be used to eliminate the work hardening11, ordinary gray cast iron grade is increased, the lowest tensile strength of its silent is fine12. How should the guide surface be handled when the ordinary lathe bed is pour
6、ed: downward?13, the performance of molding materials will directly affect the quality of castings, prone to trachoma related to what: fire resistance14. What happens when the steel and pig iron are cooled from liquid to room temperature: eutectoid15 large diameter gas pipes are mostly made by ball
7、milling cast iron16, the selection of stainless steel cup is based on what considerations: to meet the requirements of the work17. What are the radiators for the classroom: gray iron?18. What is the manufacture of Nanjing Yangtze River Bridge: Q345 steel or 16Mn steel, Wuhan, Yangtze River bridge: Q
8、235 Q420: JiujiangTwo and more1. The basic structure of iron carbon alloy: ferrite, austenite, cementite, pearlite and bainite2. Characteristics of grinding wheel: shape, particle size, bond, hardness and microstructure3 efficient grinding methods are: high speed * Powerful * abrasive belt *4. Techn
9、ical requirements for external round surface: dimensional accuracy, shape accuracy, surface roughness, and other requirements5. Four basic phases of iron carbon alloy: liquid phase L, austenite phase A, ferrite phase F and cementite phase Fe3C6, the main way to refine the grain: increasing undercool
10、ing, modification, mechanical vibration, heat treatment or pressure processing7. The factors affecting the impact value of the material: specimen shape, surface roughness, internal structure, environmental temperature during the experiment8 can be measured by what material tensile mechanical propert
11、ies: strength and plasticity9, according to the national standard, according to the processing materials commonly used in cemented carbide are: P, M, K10. The microstructure of Fe-C alloy can be divided into solid solution, metal compound and mechanical mixtureThree, fill in the blanks1. Metal cryst
12、allization2, casting parting surface selection principle: simplified process for economy: A, a small number of as flat as possible, reduce the movable block and the core of B, all of the same box, ensure the accuracy and processing of C, the main part in the box, convenient operation and inspection3
13、. Characteristics of special casting:A, also known as casting lost wax casting: A, casting of high precision, low surface roughness, B can be cast out of shape complex thin-walled castings, alloy type C gradually unrestricted steel, cast iron and non-ferrous metal D, production process complex, long
14、 production cycle, e raw material price is expensive, the cost of castings high F, not too big or too long casting wax deformationB, pressure casting: high pressure casting is two a, high production efficiency, easy to realize automatic or semi automatic B, high precision casting, the crystallizatio
15、n of low surface roughness C, casting high speed, so the fine grain casting surface compaction, strength high hardness D, easy to use and inlay inlay casting e, the cost of casting die casting machine high-pressure casting Abrasives manufacturing high cost process long preparation period does not ap
16、ply to small batch production F, die casting is not easy to heat treatment and avoid cuttingC, metal mold casting is also called permanent casting: A, high productivity, metal mold can be more than one casting,Easy to realize mechanization and automation production B, casting precision and surface q
17、uality, high machining allowance is reduced C, the mechanical properties of castings is good because of fast cooling so compact d, good working conditions to reduce dust hazards and environmental pollution e metal poor air permeability without concession casting cooling fast and easy birth defectD,
18、a, the production of hollow rotating centrifugal casting casting can save the core of gating system and riser feeding conditions so that the casting B, good mechanical properties and easy to compact C casting double metal sleeve and the bushing in the casting surface roughness D, size error, poor qu
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 金属工艺金属热处理Metal process metal heat treatment 金属工艺 金属 热处理 Metal treatment
链接地址:https://www.31doc.com/p-9184796.html