一种新型矿用高强度圆环链用钢的开发

来源期刊：钢铁2010年第5期

论文作者：王宝奇 冯文超 管琴 李印青 姜延飞

文章页码：76 - 80

关键词：圆环链； 低碳马氏体； 高强度低合金钢； 闪光对焊

Key words：round chain； low carbon martensite； high strength low alloy steel； flash butt welding

摘    要：针对目前大规格矿用C级圆环链采用贵重合金元素含量高的23MnCrNiMo54进行生产的现状,开发了一种无需轧后退火的新型低成本Mn-Mo系低碳马氏体钢。该钢种采用Mn、Mo合金化为主,添加少量的Cr,并进行Nb微合金化,无贵重元素Ni,对该钢种的CCT曲线和淬透性进行了测定,分析了不同热处理状态微观组织及力学性能,在工业化生产条件下试制了2种规格(26 mm×92 mm、30 mm×108 mm)C级矿用圆环链。结果表明:采用新钢种试制的大规格圆环链产品性能完全满足国家标准的要求,与广泛采用的23MnNiCrMo54钢相比,生产成本显著降低,是具有市场竞争力的大规格圆环链制造材料。

Abstract: The new kind of steel for mining round chain of grade C in large specific,low carbon martensitic steel alloying with Mn and Mo,was developed in order to substitute for 23MnCrNiMo54 with high content of noble alloy elements such as Ni and Mo.The experimental steel without Ni was alloyed by Mn,Mo dominantly,with Nb-microalloying and less Cr alloying.The CCT curve,hardenability curve and the mechanical properties of experimental steel after different heat treatment processes were determined.On this basis,the two kind of round chains in 26mm×92mm and 30mm×108mm were produced by experimental steels in industrial production line,and the results shown that the excellent mechanical properties of the round chains is satisfied with the specification of GB12718—2001.Compared with 23MnCrNiMo54,this new material has such merits as low content of noble alloy elements,low cost and without annealing process after hot rolling,and is a kind competitive material for production of round chain in industrial scale.