p0 ¦wàü÷uäGý2¿ £þ}ä2N^S 关键词：熔凝硬化，硬化层，显微组织，显微硬度 [gap=5275]Keyword： melting sclerosis， hardening layer， microstructure， microhardness.
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...e crack initiation; Surface microstructure; Hardened layer [gap=7865]关键词： M2钢轴辊;疲劳裂纹萌生;表面微观结构;硬化层 ...
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硬化层秋材 densified laminated wood
硬化层深度 Depth Hardening Case ; depth of hardened layer ; Depth of harding
硬化层积材 [木] hardened layer wood ; [木] amber wood ; hardened laminates
硬化层压木 [木] densified laminated wood
渗碳硬化层深度 carburatedcasedepth
硬化深层 depth of hardening ; depth of exertening
金相及有效硬化层深度 Metallographic and effective case depth
浸碳硬化深层 carburized case depth ; carburized cottom depth ; carburized cautomotive service engineers depth
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因此，辊子需要较高的表面硬度和较深的硬化层深度。
Thus, these rolls require a higher surface hardness and must be hardened to a greater depth.
结果表明，表面熔化处理后的硬化层的硬度梯度平缓，耐磨性高。
The results showed that the hardening layer has better hardness gradient and high wear resistance.
由于硬化层与基体的微观结构不同，也就为超声波测量硬化层的深度提供了条件。
The micro-structure of hardening layer and motherly-body is different, which provide passibility for measuring the depth of hardening layer by supersonic ware.
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