锌基涂层高强钢板对模具钢摩擦学特征的影响
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摘要
利用UMT-3高温摩擦磨损试验机对热镀锌、合金化热镀锌、无涂层热冲压高强钢板与模具钢在400℃下的摩擦学特征进行研究。结果表明:摩擦初期锌基涂层钢板具有低的摩擦因数,而在达到稳定期后摩擦因数较无涂层钢板较高;热镀锌(GI)和合金化热镀锌(GA)板的摩擦学特征相似。三种钢板与模具钢的摩擦机制均为黏着磨损和氧化磨损,在初期以黏着磨损为主,后期以氧化磨损为主。在高温摩擦磨损时,形成连续光滑摩擦氧化层能够降低摩擦因数。涂层Zn元素对摩擦氧化层的磨损性能有较大的影响。
Tribological characteristics of three kinds of high strength steel sheets used in hot stamping contacts with die steel under 400 ℃were investigated using the UMT-3 high temperature friction testing machine. The results show that the friction coefficient of the steel plate with zinc coating is low in initial stage,but higher when in the stable stage compared with the no-coating one. The galvanized steel plate (GI)and galvannealed steel plate (GA) have similarity tribological characteristics. Friction mechanisms of three kinds of steel plate against with die steel are adhesive wear and oxidative wear. Adhesive wear is primary wear mechanism in initial stage,but oxidative wear turn to primary wear mechanism in stable stage. Forming continuous and smooth frictional oxidative layer can decrease the friction coefficient. Experimental high load is beneficial to forming continuous and steady frictional oxidative layer. Zinc element in coating has important influence on wear resistance of frictional oxidation layer.
Tribological characteristics of three kinds of high strength steel sheets used in hot stamping contacts with die steel under 400 ℃were investigated using the UMT-3 high temperature friction testing machine. The results show that the friction coefficient of the steel plate with zinc coating is low in initial stage,but higher when in the stable stage compared with the no-coating one. The galvanized steel plate (GI)and galvannealed steel plate (GA) have similarity tribological characteristics. Friction mechanisms of three kinds of steel plate against with die steel are adhesive wear and oxidative wear. Adhesive wear is primary wear mechanism in initial stage,but oxidative wear turn to primary wear mechanism in stable stage. Forming continuous and smooth frictional oxidative layer can decrease the friction coefficient. Experimental high load is beneficial to forming continuous and steady frictional oxidative layer. Zinc element in coating has important influence on wear resistance of frictional oxidation layer.
引文
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[5]李冰,张春,王敏等.汽车地板纵梁用Al-Si涂层硼钢板的热冲压[J].金属热处理,2017,42(6):38-42.Li Bing,Zhang Chun,Wang Min,et al.Hot stamping of Al-SI coated boron steel plate used for car floor beam[J].Heat Treatment of Metals,2011,205(17-18):4141-4153.
[6]Erik D S,John G L.The effect of process and material parameters on the coefficient of friction in the flatdie test[J].Journal of Materials Processing Technology,2010,210:868-876.
[7]李波,康永林,朱国明,等.汽车用合金化热镀锌钢板摩擦特性研究[J].材料科学与工艺,2013,21(5):88-94.Li Bo,Kang Yonglin,Zhu Guoming,et al.Friction characteristics of automotive galvannealed steel sheets[J].Materials Science and Technology,2013,21(5):88-94.
[8]Ghiotti A,Bruschi S,Borsetto F.Tribological characteristics of high strength steel sheets under hot stamping conditions[J].Journal of Materials Processing Technology,2011,211(11):1694-1700.
[9]Wang S Q,Wang L,Zhao Y T,et al.Mild-to-severe wear transition and transition region of oxidative wear in steels[J].Wear,2013,306:311-320.
[10]黎欣欣,李爽,吴晓春.一种新型热冲压模具钢的高温摩擦磨损性能[J].金属热处理,2016,41(2):43-48.Li Xinxin,Li Shuang,Wu Xiaochun.Friction and wear behavior of a new type of hot stamping die steel at elevated temperature[J].Heat Treatment of Metals,2016,41(2):43-48.
[11]Zhang Zhiqiang,Li Xianshuang,Zhao Yong et al.Heat transfer in hot stamping of high-strength steel sheets[J].Metallurgical and Materials Transactions B,2014,45(4):1192-1195.
[12]Hardell J,Prakash B.High-temperature friction and wear behaviour of different tool steels during sliding against Al-Si-coated high-strength steel[J].Tribology International,2008,41(7):663-671.
[13]Eriksson J,Olsson M.Tribological testing of commercial CrN,(Ti,Al)N and CrC/C PVD coatings-Evaluation of galling and wear characteristics against different high strength steels[J].Surface and Coatings Technology,2011,205(16):4045-4051.
[14]Pauschitz A,Roy M,Franek F.Mechanisms of sliding wear of metals and alloys at elevated temperatures[J].Tribology International,2008,41(7):584-602.