The fracture problem of die steel is one of the common problems of the material, some material experts found that by quenching the raw material can make it difficult to fracture the die steel. Severe carbide segregation of the raw material, untimely tempering of the hardened billets, excessive residual internal stresses and the application of new internal stresses formed during the wire cutting process lead to the formation of cracks in the wire cutting. Die steel failure problem can be effectively solved by the following distribution.

1,raw material reforging, double lateral deformation forging upsetting and pulling, four upsetting and four pulling after the forging of the fiber tissue around the cavity or axis is waveform symmetrical distribution, by high temperature quenching on the residual heat, and then high temperature tempering.

2,the development of improved heat treatment process to control the content of residual austenite in the final quenching so that it does not exceed the standard.

3,timely leave after hardening to eliminate the hardening stress.

4,Properly reduce the grinding speed, grinding volume and cooling rate during grinding, which can effectively prevent grinding cracks.