It improves the machinability of steels because of brittlement of grain boundaries resulting from the tin segregating on the grain boundaries of the steels.
锡可有效改善钢材的易切削性能，原因是在切削温度范围内富集在晶界的锡使钢材的塑性降低。
The results show that the failure is mainly attributed to the inappropriate heat-treatment technology of the locking nut and the hydrogen brittlement from electroplating of the stopping pad.
构件失效的主要原因是：锁紧螺母的热处理工艺不当，止动垫电镀过程发生氢脆。
The results show that the failure is mainly attributed to the inappropriate heat-treatment technology of the locking nut and the hydrogen brittlement from electroplating of the stopping pad.
构件失效的主要原因是：锁紧螺母的热处理工艺不当，止动垫电镀过程发生氢脆。
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