There exist problems of cold-working hardening and hydrogen-brittle in the cold-drawing process for seamless steel tube, responsible for the cracking in the steel tube.
在无缝钢管的冷拔过程中，存在着冷作硬化和氢脆现象，它们是造成钢管开裂的主要原因。
The principal problems with respect to roll working life are cracking at the surface of roll for hot-rolling and that effective zone of quench-hardening of roll for cold-rolling is too narrow.
热轧工作辊的裂纹损坏和冷轧工作辊有效淬硬层过浅是两大突出问题。
The principal problems with respect to roll working life are cracking at the surface of roll for hot-rolling and that effective zone of quench-hardening of roll for cold-rolling is too narrow.
热轧工作辊的裂纹损坏和冷轧工作辊有效淬硬层过浅是两大突出问题。
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