低成本热轧700MPa级载重汽车车厢板的耐磨性能
Wear Resistance of Low-cost Hot-rolled 700 MPa Grade Plate for Heavy Duty Truck Carriage
摘 要
通过常温摩擦磨损试验对低成本热轧700 MPa级载重汽车车厢板耐磨性能进行了研究, 并探讨了显微组织、纳米析出物对其耐磨性能的影响规律。结果表明: 当磨损时间为40 min时, 700 MPa级车厢板的质量损失为40.7 mg, 表面塑性变形层厚度为37 μm; 微裂纹易在铁素体与珠光体或贝氏体相界面形核并扩展; 当碳化物呈条状或颗粒状时, 变形过程中不易发生应力集中, 碳化物与基体界面之间无明显的微裂纹形成; 700 MPa级车厢板中的纳米析出物(Nb, Ti)C可有效地提高其耐磨性, 其磨损机理以磨粒磨损为主。
耐磨性能
纳米析出物
宏观硬度
ultra-high strength steel
wear resistance
nano-scale precipitation
macrohardness
Abstract
The wear resistance of low-cost hot-rolled 700 MPa grade plate for heavy duty truck carriage was studied by room temperature friction and wear test, and effects of microstructure, nano-scale precipitation on wear resistance were investigated. The results indicate that when the wear time was 40 min, the weight loss of the plate was 40.7 mg, and the thickness of surface plastic deformation layer was 37 μm. Microcracks nucleated easily and propagated on phase interface between ferrite and pearlite or bainite. When the carbides were stripe or granular in shape, stress concentration appeared difficultly, and there were no microcracks forming on phase interface between carbides and matrix. The nano-scale precipitation (Nb, Ti)C in the plate could effectively improve its wear resistance, and the wear mechanism of the plate was mainly abrasive wear.
中图分类号 TG142
所属栏目 材料性能及其应用
基金项目 国家重点基础研究发展计划项目(2011CB606306-2); 教育部项目基本科研业务费项目研究生科研创新项目(N090607003)
收稿日期 2012/7/9
修改稿日期 2013/5/14
网络出版日期
作者单位点击查看
备注王晓南(1984-), 男, 内蒙古通辽人, 讲师, 博士。
引用该论文: WANG Xiao-nan,DU Lin-xiu,DI Hong-shuang. Wear Resistance of Low-cost Hot-rolled 700 MPa Grade Plate for Heavy Duty Truck Carriage[J]. Materials for mechancial engineering, 2013, 37(8): 63～67
王晓南,杜林秀,邸洪双. 低成本热轧700MPa级载重汽车车厢板的耐磨性能[J]. 机械工程材料, 2013, 37(8): 63～67
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参考文献
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【2】王国栋, 刘振宇.新一代节约型高性能结构钢的研究现状与进展[J].中国材料进展, 2011, 30(12): 12-17.
【3】康永林.汽车轻量化先进高强钢与节能减排[J].钢铁, 2008, 43(6): 1-7.
【4】TETSUO S, YOSHIMASA F, SHINJIRO K. High strength steel sheets for automobile suspension and chassis use (high strength hot-rolled steel sheets with excellent press formability and durability for critical safety parts)[J].JFE Technical Report, 2004(4): 25-31.
【5】KAZUHIRO S, YOSHIMASA F, SHINJIRO K. Hot rolled high strength steels for suspension and chassis parts "NANOHITEN" and "BHT steel"[J].JFE Technical Report, 2007(10): 19-25.
【6】MISRA R D K, NATHANI H, HARTMANN J E, et al. Microstructural evolution in a new 770 MPa hot rolled Nb-Ti microalloyed steel [J].Materials Science and Engineering: A, 2005, 394: 339-352.
【7】李文斌, 费静, 曹忠孝, 等.我国低合金高强度耐磨钢的生产现状及发展方向[J].机械工程材料, 2012, 36(2): 6-10.
【8】沈宗树, 陈国喜, 孙家枢, 等.Hardox500耐磨钢板的焊接性及其应用[J].机械工程材料, 2006, 30(7): 63-65.
【9】宋勇军, 王晓南, 徐兆国, 等.700 MPa级超高强重载汽车车厢板的研制[J].机械工程学报, 2011, 47(22): 69-73.
【10】王晓南, 邸洪双, 杜林秀.形变及冷却速率对热轧超高强汽车钢板中纳米析出的影响[J].金属学报, 2012, 48(5): 621-628.
【11】张安利, 潘应君, 周青春, 等.稀土元素对Fe-Cr-2Mo钢夹杂物形态及耐磨性的影响[J].武汉科技大学学报, 2008, 31(6): 591-594.
【12】KIM C Y, LEE S, JUNG J Y, et al. Effects of complex carbide fraction on high-temperature wear properties of hard facing alloys reinforced with complex carbides[J].Materials Science and Engineering: A, 2003, 349: 1-11.
【13】王磊. 材料的力学性能[M].沈阳: 东北大学出版社, 2005: 200-219.
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