In addition, to weaken the effect of doublequenching on the microstructure and properties of ASTM4130 steel, multi-pass welding and temper bead should be adopted.
另外为消除二次淬火对ASTM 4130钢组织和性能的影响，应采用多层多道焊，并添加回火焊道。
2
For this reason, special inductor and fixture have been designed and the heat treatment problem of the reverse fork has been successfully solved by double high frequency quenching.