Experimental results showed that the service life of die can be improved evidently by using high temperature quenching and stress relief annealing.
实践证明，采用高温淬火和中间消应力退火可显著提高其使用寿命。
2
How to repair the cold die with quenching crack is badly needed in industrial productions.
如何修复已出现淬火裂纹的模具，是工业生产中急需解决的问题。
3
The effects on the properties and die lifespan of forging, conditioning heat treatment, quenching ami tempering, surface heat treatment are researched.