3 Piece Forged Wheels Heat Treatment Principle
3 Piece forged Wheels Heat treatment principle
Free three forging wheel application equipment and tools are very versatile, and the tool is simple, so only forging shape simple three forging wheels, the operation intensity, low productivity; free forging can be forging quality from less than 1kg to 200 ~ 300t of the three forging wheel. For large 3 forged wheels, free forging is the only method of processing, so free forging in heavy machinery manufacturing has a particularly important significance. Free forging to rely on the operator to control its shape and size, 3 forging wheels with low accuracy, poor surface quality, metal consumption is also more. Therefore, the free forging mainly used for many varieties, the production of small pieces of small batch production, can also be used for die forging before the process. Stainless steel 3 forged wheels Main features:
1, welding: the use of different products on the welding performance requirements are also different.
2, corrosion resistance: Most stainless steel 3 forged wheel products require good corrosion resistance.
3, polishing performance: stainless steel 3 forged wheels in the production are generally polished after this process, only a small number of stainless steel 3 forged wheels do not need to polish
4, heat resistance: heat resistance refers to the high temperature stainless steel 3 forged wheels can still maintain its excellent physical and mechanical properties.
5, the impact of carbon: carbon in austenitic stainless steel is strongly formed and stable. The austenite and the elements of the austenite region are enlarged. Due to the harmful effects of carbon, not only in the austenitic stainless steel smelting and should be required to control as low as possible carbon content, but also in the subsequent heat, cold processing and heat treatment process is also to prevent the stainless steel surface by carbon, and chrome-free Carbide precipitation. Basics in the production of 1,3-forged wheels: preliminary knowledge of crystal structures, preliminary knowledge of crystallization and allotropes, phase diagrams and leverage laws, preliminary knowledge of diffusion of solid metals. The more important knowledge is the knowledge of iron-carbon (Fe-Fe3C) phase diagrams.
2,3 pieces of forging wheel heat treatment principle knowledge: heat treatment of the types of microstructure of pearlite, austenite, sorbite, bainite, martensite, Wei body. Various types of heat treatment transition curves are read and used, especially the CCT diagram of the cooling transition curve.
3,3 forging wheel chemical heat treatment of the basic knowledge: chemical heat treatment process of chemical reactions, process parameters on the impact of product quality, the composition of the commonly used atmosphere.
4, alloy structural steel, tool die steel, bearing steel, stainless steel, cast iron, non-ferrous metals and other types of basic knowledge of steel. Causes and Preventive Methods of Heat Defects in Three Forged Wheels. On the scene of the entire process of product quality factors can make an advance judgment. Treatment of rework.