钒含量对不同冷速冷却后高碳珠光体钢显微组织的影响
Effect of Vanadium Content on Microstructure of High-carbon Pearlitic Steels at Different Cooling Rates
摘 要
将高碳SWRS82B盘条钢进行钒元素微合金化后, 采用盐浴等温处理和不同冷速的风冷条件进行冷却, 研究钒含量对试验钢显微组织的影响。结果表明: 钒含量的加入能细化SWRS82B盘条钢奥氏体晶粒, 当钢中钒含量大于0.16 %(质量分数, 下同)、在低于16 ℃·s-1冷速风冷时, 晶界会明显出现铁素体; 而钒含量控制在小于0.08%、风冷冷速在10~16 ℃·s-1时均可避免铁素体的形成; 其原因是钒促进了碳化物在晶界富集, 在晶界附近特定区域形成了贫碳区, 促进了铁素体形成, 并且钒元素的加入会使高碳钢共析点右移, 使先共析铁素体相区增大。
钒微合金化
先共析铁素体
high carbon steel
vanadium micro-alloying
pro-eutectoid ferrite
Abstract
The microstructure changing of SWRS82B wire rod steel with vanadium microalloying after air-cooling at different cooling rates and salt bath cooling were invistigated. The results show that vanadium refined the austenite grains in SWRS82B wire rod steel. When the vanadium content was more than 0.16wt%, ferrites along crystal boundary grew obviously after air-cooling below 16 ℃·s-1. When the vanadium content was less than 0.08wt%, and the air-cooled rate was between 10-16 ℃·s-1, the ferrites did not apperared in the specmens. Vanadium element encouraged the segregation of carbide along grain boundary, and the formation of carbon-poor zone in some areas promoted the appearance of ferrite. And by addition of vanadium element the eutectoid point of high carbon steel moved to the right, which enlarged the area of pro-eutectoid ferrite.
中图分类号 TG113.12
所属栏目 试验研究
基金项目 贵州省科学技术基金资助项目(黔科[2009]2231); 贵州大学引进人才科研项目(贵大[2009]014)
收稿日期 2012/9/21
修改稿日期 2013/6/8
网络出版日期
作者单位点击查看
备注梁宇(1978-), 男, 贵州遵义人, 副教授, 博士。
引用该论文: LIANG Yu,SHI Zhi-yi,LIANG Yi-long. Effect of Vanadium Content on Microstructure of High-carbon Pearlitic Steels at Different Cooling Rates[J]. Materials for mechancial engineering, 2013, 37(8): 19～22
梁宇,石芷伊,梁益龙. 钒含量对不同冷速冷却后高碳珠光体钢显微组织的影响[J]. 机械工程材料, 2013, 37(8): 19～22
被引情况:
【1】徐亮,章小浒,黄金国,方国爱,江慧丰,李书瑞, "700 MPa级低碳微合金钢的连续冷却相变组织及强韧性",机械工程材料 39, 29-35(2015)
【2】王安东,王骏宇,田林茂, "Precipitation Law of V(C,N) in Austenite of Vanadium Microalloyed Steel",机械工程材料 40, 23-26(2016)
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【2】卢向阳, 刘明, 贾斌, 等.V、N合金在非调质钢中的应用[J].钢铁钒钛, 2000, 21(3): 119-123.
【3】苏义祥, 门志慧.钒对碳钢组织及耐磨性能的影响[J].机械工程材料, 2005, 29(2): 42-44
【4】王勇围, 桂美文, 周勇, 等.V、N微合金化对高碳钢82B性能的影响[J].材料热处理学报, 2011, 32(1): 82-86.
【5】李诚诚, 乔桂英, 曹雅彬, 等.钒对X80管线钢热变形后连续冷却转变行为的影响[J].机械工程材料, 2011, 35(6): 35-37
【6】PICKERING F B, GARBARZ B. Strengthening in pearlite formed from thermo-mechanically processed austenite in vanadium steels and implications for toughness[J].Materials Science and Technology, 1989, 5(3): 227-237.
【7】HAN K, Effect of silicon and vanadium additions on structure and properties of pearlitic steels[D].Oxford: Oxford University, 1992.
【8】MOTTISHAW T D, Effects of alloy additions on properties of pearlitic steels[D].Oxford: Oxford University, 1984.
【9】HAN K, MOTTISHAW T D, SMITH G D W, et al. Effects of vanadium addition on nucleation and growth of pearlite in high carbon steel[J]. Materials Science and Technology, 1994, 10: 955-963.
【10】李翼, 杨忠民.V对高碳钢连续冷却时组织转变的影响[J].金属学报, 2010, 46(12): 1501-1510.
【11】GUO Z, KIMURA N, TAGASHIRA S, et al. Kinetics and crystallography of intragranular pearlite transformation nucleated at (MnS+VC) complex precipitates in hypereutectoid Fe-Mn-C alloys[J].ISIJ Int, 2002, 42: 1033-1041.
【12】郭正洪.钢中珠光体相变机制的研究进展[J].材料热处理学报, 2003, 23(3): 1-7.
【13】KHALID F A, EDMONDS D V. Effect of vanadium on the grain boundary carbide nucleation of pearlite in high-carbon steels[J].Scripta Metallurgica et Materialia, 1994, 30(10): 1251-1255.
【14】牛亚然, 陈光, 赵金伟, 等.72A硬线钢丝拉拔裂纹的形成与扩展机制[J].机械工程材料, 2004, 28(8): 49-51.
【15】商振宇, 郑建柱.高碳硬线盘条拉拔断丝分析[J].金属世界, 2009(4): 50-51.
【16】张春燕, 陈兴伟, 张祥艳, 等.65钢丝拉拔断裂分析与盘条生产工艺改进[J].金属制品, 2009, 35(4): 44-51.
【17】巴发海, 李玲, 陆洲. 港口桥吊用钢丝绳断丝原因分析[J].机械工程材料, 2009, 33(12): 90-93.
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