In order to improve the quality of automotive gears, various heat treatment processes are used to heat treat gear forging blanks to obtain good machinability and uniform microstructure, which is beneficial to reducing the probability of irregular deformation of automotive gear forging blanks during carburization and quenching. In order to obtain the effect of heat treatment process on the performance of automotive gear forging blanks, the performance of automotive gear forging blanks was studied.
| Project | C | Si | Mn | S | P | Cr | Fe |
| Mass fraction/% | 0.198 | 0.182 | 1.325 | 0.024 | 0.031 | 1.250 | Allowance |
Before the performance test of automotive gear forging stock begins, the preparation for the test should be completed, and 20MnCr5 steel automotive gear forging stock should be selected as the sample for this test; The chemical composition and mass fraction of 20MnCr5 steel automotive gear forging blanks are shown in the table.