Defects often caused by improper heat treatment pr
2022-10-03- Detail
Defects often caused by improper post forging heat treatment process
defects usually caused by improper post forging heat treatment process:
1 The reasons for insufficient hardness of forgings caused by improper post forging heat treatment process are: ① the quenching temperature is too low; ② Quenching heating time is too short; ③ Tempering temperature is too high; ④ Repeated heating causes serious decarburization on the surface of forgings; ⑤ The chemistry of steel so as to realize the overall control of the mechanical properties of materials. Generally, if the composition is unqualified, use the following formula to calculate the mold size:
improper post forging heat treatment process will lead to electrical failure. The reasons for the high hardness of forgings are: ① too fast cooling after normalizing; ② Normalizing or tempering heating time is too short; ③ Unqualified chemical composition of steel, etc
2. Uneven hardness
the main reason for uneven hardness is the improper heat treatment process, such as too much heat or too short holding time for one-time loading of high carbon steel or low carbon alloy steel, cold work die steel, etc; Or heating causes partial decarburization of forgings, etc. (end)
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