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局部淬火
partial quenching
local quenching
differential quenching
[机] selective quenching
local quenching
differential quenching
[机] selective quenching
- 硬块。通常由于局部淬火引起钢管上某一部位硬度值远高于周围金属的硬度值。
Hard Spot. An area in the pipe with a hardness level considerably higher than that of the surrounding metal, usually due to localized quenching. - 认为，淬火过程中产生的局部拉应力加上尖锐V型槽口引起的应力集中是造成开裂的主要原因。
It is concluded that the local tensile stress created during quenching process and the stress concentration due to sharp V-shaped notch are the primary reasons of cracking. - 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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