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引言对低碳低合金高强度钢进行微合金化处理和控制轧制,通过晶粒细化进一步提高热轧中厚板的强度与韧性,能满足各种焊接结构用途越来越高的综合性能要求,已为世界各国大量的试验与生产结果所证实。对于低碳低合金钢,在不进行微合金化的条件下,进行控制轧制,也能获得细化晶粒,改善强度与低温冲击韧性的效果,这一点,已为武钢16锰桥板1979年的生产试验所证实。试验结果表明,采用奥氏体静再结晶细化(即I型)控制轧制工艺,对细化铁索体晶粒,改善-40℃低温冲击韧性效果显著,同时由于避免了低温轧制所引起的MnS夹
Introduction Low-carbon, low-alloy high-strength steels are microalloyed and controlled for rolling to further enhance the strength and toughness of hot-rolled plate through grain refinement to meet the increasingly high overall performance of various welded structures Requirements, has been confirmed by the large number of tests and production results in various countries in the world. For low-carbon low-alloy steel, without micro-alloying under the conditions of controlled rolling, but also to obtain grain refinement, to improve the strength and low temperature impact toughness, which has been WISCO 16 manganese bridge 1979 Years of production tests confirmed. The results show that the austenite recrystallization refinement (ie, I-type) control rolling process, the refinement of ferrite grains, to improve the low-temperature impact toughness of -40 ℃ significant effect, while avoiding the low-temperature rolling caused MnS clamps