热处理对磨机磨片用Cr26高铬铸铁的组织及硬度的影响
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摘要
针对磨机磨片的实际工作条件和性能要求,采用金相显微镜和洛氏硬度计研究淬火温度和回火温度对Cr26高铬铸铁组织和硬度的影响。结果表明:Cr26高铬铸铁的淬火加热温度宜选择在1020～1050℃,并在510～530℃回火3 h,此时洛氏硬度可达到62～63 HRC;回火组织为回火马氏体+淬火马氏体+莱氏体+二次碳化物。该工艺目前在某造纸磨机磨片上得到成功应用,使用效果好。
Aiming at the actual working conditions and performance requirements of abrasive disc of mill, the effects of quenching temperature and tempering temperature on microstructure and hardness of Cr26 high chromium cast iron were studied by means of metallographic microscope and Rockwell hardness tester. The results show that the quenching heating temperature of Cr26 high chromium cast iron should be selected at 1020-1050 ℃, and tempering at 510-530 ℃for 3 h. Under this condition, the Rockwell hardness reaches 62-63 HRC. The tempered microstructure is tempered martensite +quenched martensite+ledeburite+secondary carbide. This process is successfully applied in the abrasive disc of a paper mill, and the use effect is good.
Aiming at the actual working conditions and performance requirements of abrasive disc of mill, the effects of quenching temperature and tempering temperature on microstructure and hardness of Cr26 high chromium cast iron were studied by means of metallographic microscope and Rockwell hardness tester. The results show that the quenching heating temperature of Cr26 high chromium cast iron should be selected at 1020-1050 ℃, and tempering at 510-530 ℃for 3 h. Under this condition, the Rockwell hardness reaches 62-63 HRC. The tempered microstructure is tempered martensite +quenched martensite+ledeburite+secondary carbide. This process is successfully applied in the abrasive disc of a paper mill, and the use effect is good.
引文
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[2]吴江,潘东杰,黄列群,等.我国热磨机磨片的研究应用及发展[J].铸造技术,2015,36(10):2443-2447.
[3]张欣欣.1Cr17Ni4不锈钢热磨机磨片热处理工艺研究[D].上海:华东理工大学,2015.
[4]张绍群,颜家雄,花军.热磨法纤维分离能量耗散影响因素的分析[J].林产工业,2016,43(6):42-45.
[5]毛双亮,水恒勇,陈闪闪,等.Cr26型高铬铸铁组织性能及其热处理工艺[J].铸造技术,2011,32(9):1230-1233.
[6]付玲,刘延斌,李飞.热处理工艺对Cr26型高铬铸铁组织与性能的影响[J].材料热处理学报,2015,36(3):40-44.
[7]李红宇,刘宝存.热处理工艺对高铬铸铁轧辊组织及性能的影响[J].中国铸造装备与技术,2016(5):57-58.
[8]朱丽娟,杨程坤,刘越,等.高炉衬板用Cr26高铬铸铁热处理工艺研究[J].铸造,2010,59(3):308-311.
[9]郑立允,王肖肖,高杰,等.热处理对Cr26型高铬铸铁组织与性能的影响[J].河北工程大学学报:自然科学版,2015,32(3):83-86.
[10]曹良桂,周荣锋,李璐,等.脉冲电压对低过热过共晶高铬铸铁熔体凝固组织的影响[J].热加工工艺,2016,45(1):32-36.
[11]甘宅平.热处理制度对高铬铸铁组织和硬度的影响[J].武钢技术,2001,39(4):30-33.
[12]谈淑咏.热处理对高铬铸铁组织和性能的影响[J].盐城工学院学报:自然科学版,2008,21(1):62-65.