低合金贝氏体球墨铸铁磨球热处理工艺参数的确定
Determination of Heat Treatment Process Parameters of the Milling Ball in Low Alloyed Bainite Ductile Iron
摘 要
研究了室温油分级等温淬火热处理工艺参数对低合金贝氏体球墨铸铁磨球组织和性能的影响.结果表明：试验条件下最佳热处理工艺参数为奥氏体化温度930～950 ℃,出油温度180～220 ℃,出油入炉时间60 s,等温温度220～240 ℃,等温时间1～1.5 h;此时材料基体组织为下贝氏体+少量的马氏体、残余奥氏体和碳化物,其冲击韧度大于14 J/cm2,硬度为52~56 HRC.
贝氏体
球墨铸铁
磨球
step austempering
Bainite
ductile iron
milling ball
Abstract
The effects of heat treatment process parameters of the step austempering in room-temperature machine oil on the structure and properties of the low alloy bainite ductile iron for milling ball have been studied.The optimum process parameters of austenitizing temperature were 930-950 ℃,the temperature for taking out of oil was 180-220 ℃,the time interval from oil to furnace was 60 s,the isothermal temperature was 220-240 ℃,and the isothermal time was 1-1.5 h.The matrix microstructure of the material consisted of lower bainite,a small amount of martensite,retained austenite and carbide.For the obtained milling ball and impact sample,the impact toughness was more than 14 J/cm2 and hardness was 52-56 HRC.
中图分类号 TG143.5
所属栏目
基金项目 桂林电子科技大学软环境建设资助项目
收稿日期 2004/12/15
修改稿日期 2006/3/1
网络出版日期
作者单位点击查看
备注魏德强 (1963-),男,吉林榆树人,副教授,硕士.
引用该论文: WEI De-qiang,XUE Xing,YUN Zhi-dong. Determination of Heat Treatment Process Parameters of the Milling Ball in Low Alloyed Bainite Ductile Iron[J]. Materials for mechancial engineering, 2006, 30(7): 59～62
魏德强,薛兴,恽志东. 低合金贝氏体球墨铸铁磨球热处理工艺参数的确定[J]. 机械工程材料, 2006, 30(7): 59～62
被引情况:
【1】崔君军,陈礼清, "钒对合金化贝氏体球墨铸铁显微组织和性能的影响",机械工程材料 40, 60-64(2016)
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参考文献
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【5】Ali M Rashidi.Effect of tempering conditions on the mechanical properties of ductile cast iron with dual matrix structure DMS[J].Materials Letters,2000,(9):203-207.
【6】Murat Baydogan.The effect of austempering time on mechanical properties of a ductile iron[J].Scandinavian Journal of Metallurgy,2001,30:391-395.
【2】魏秉庆,梁吉,吴德海.连续冷却淬火贝氏体球墨铸铁的断裂韧性[J].清华大学学报(自然科学版),1999,39(2):46-48.
【3】周世权.贝氏体球铁组织与性能[J].热加工工艺,1993,(5):17-19.
【4】徐建芬.等温淬火时间对贝氏体球铁组织的影响[J].上海钢研,1998,(2):18-21.
【5】Ali M Rashidi.Effect of tempering conditions on the mechanical properties of ductile cast iron with dual matrix structure DMS[J].Materials Letters,2000,(9):203-207.
【6】Murat Baydogan.The effect of austempering time on mechanical properties of a ductile iron[J].Scandinavian Journal of Metallurgy,2001,30:391-395.
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