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合金铸铁夹送辊的制造及应用研究
Study on Manufacture and Application of Alloy Cast Iron Pinch Roller
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- DOI:
- 作者:
- 程礼 许嘉雄 安萍
CHENG Li;XU Jiaxiong;AN Ping
- 作者单位:
- 武汉钢铁有限公司热轧厂 湖北精利机电科技有限公司
Wuhan Iron and Steel Co.,Ltd.,Wuhan 430083,China;Hubei Jingli Electromechanical Technology Co.,Ltd.,Huanggang 438000,China
- 关键词:
- 夹送辊 铸铁 热处理 硬度 抗拉强度
pinch roll cast iron heat treatment hardness tensile strength
- 摘要:
- 利用正交试验方法研究不同热处理工艺对合金铸铁夹送辊的组织及力学性能的影响,确定了最佳的热处理工艺参数,制作出高硬度高耐磨的合金铸铁夹送辊辊筒。研究表明,最佳热处理工艺为:淬火温度870℃,保温时间1 h;回火温度220℃,保温时间4 h。此时,合金的硬度达到55.92 HRC,比铸态合金提高了37%,抗拉强度为502 MPa,满足夹送辊的性能要求。经过生产线实际验证,夹送辊零件适用于高强钢、低温双相钢、管线钢等所有钢材产品的卷取,平均毫米过钢量达7.88万吨,生产成本显著降低。
The influence of different heat treatment processes on the microstructure and mechanical properties of alloy cast iron pinch roller was studied by orthogonal test method,the optimum heat treatment process parameters were determined,and the alloy cast iron pinch roller with high hardness and wear resistance was manufactured.The results show that the optimum heat treatment processes are:quenching temperature 870℃,heat preservation time 1 h;tempering temperature 220℃,holding time 4 h.At this time,the hardness of the alloy reach 55.92 HRC,37%higher than that of the as-cast alloy,and the tensile strength is 502 MPa,satisfying the performance requirements of the pinch and feed roller.The production line has verified that the parts of the pinch roller are suitable for the rolling of high strength steel,low temperature duplex steel,pipeline steel and other steel products,with an average steel volume of 78800 tons and a significantly reduced production cost.