Uniformity of microhardness improved significantly after high temperature diffusion annealing.
经高温扩散退火处理后，显微硬度均匀性显著提高。
Toughness of powder forging steel can be increased efficiently by diffusion annealing in longer time.
长时间扩散退火可有效地提高粉末锻造钢的韧性。
Ultrasonic testing shows on flake defects in theheavy forgings of ESR steel without any diffusion annealing.
未经扩氢退火的电渣钢大锻件经超声波检验，未发现白点缺陷。
It is found that shock toughness of powder forging part can be increased obviously by diffusion annealing for long time.
发现长时间扩散退火可显著提高粉末锻件的冲击韧性。
It is found that shock toughness of powder forging part can be increased obviously by diffusion annealing for long time.
发现长时间扩散退火可显著提高粉末锻件的冲击韧性。
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