selective tempering
... localized target ==> 局部目标,局部目标 localized tempering ==> 局部回火,局部回火 localized tetanus ==> 局限性破伤风,局限性破伤风,局限性强直,局限性强直 ...
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高温局部回火 Partly temper at high temperature
局部磨削回火烧伤 localized grinding temper
严重的碳化物带状偏析，使拉刀产生局部淬火过热和回火不足，造成内应力急剧增高，最终导致拉刀断裂。
It was found that the broach was locally overheated due to band segregation of carbide, and under-tempered. These factors caused fracture of broach as a result of high internal stress.
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