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。
The effects of protective atmosphere on magnetic properties of non-oriented silicon steel for high-efficiency motors after stress relief annealing are investigated.
研究了保护气氛对高效电机用无取向电工钢消除应力退火后磁性能的影响。
The effects of protective atmosphere on magnetic properties of non-oriented silicon steel for high-efficiency motors after stress relief annealing are investigated.
研究了保护气氛对高效电机用无取向电工钢消除应力退火后磁性能的影响。
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