Optimization method and processing step of high-end hot work die steel
A technology of hot work die steel and optimization method, applied in the field of mechanical parts forming, can solve the problems of inconsistent mechanical properties of the die in all directions, die failure, etc., to achieve excellent thermal crack resistance, improved service life, good thermal strength and toughness Effect
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[0028] Example 1:
[0029] Take YFH-17 steel as an example,
[0030] 1. The chemical composition formula (weight ratio) of trace elements of YFH-17 die steel, please refer to the following table.
[0031] chemical composition
[0032] It can be seen from the above table:
[0033] The content of molybdenum (MO) in YFH-17 steel breaks the upper limit of the H13 standard of 1.75 and is greatly increased to above 2.20, which can refine the steel's grains, improve hardenability and thermal strength, and maintain sufficient strength and creep resistance at high temperatures Variable capacity (the gradual deformation that occurs when working at high temperature for a long time is called creep).
[0034] At the same time, YFH-17 steel greatly reduces the content of vanadium (V) below the lower limit of the H13 standard, and the vanadium content in the steel is generally not more than 0.5%. Vanadium has a strong affinity with carbon, ammonia, and oxygen, and forms corresponding stable compo...
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