The self-developed high-temperature friction tester was used to simulate the high-temperature friction process of uncoated 22MnB5 steel under actual hot stamping process. The influence of initial friction temperature, sliding speed and normal load on the friction behavior were analyzed. The results indicated that since the oxide layers formed on the surface of the specimen during transfer process had the same protective and lubricating effect on friction, the initial friction temperature had little effect on the friction coefficient. When the sliding speed was low, the oxides on the specimen surface would form small accumulation blocks with non-uniform thickness, which made the specimen surface uneven. And the oxides could not support the friction interface well, resulted in high coefficient of friction. As the normal load increased, the friction coefficient increased due to the spalling of the oxide layers and the exposure of the metal substrate.
［1］李杨, 刘汉武, 杜云慧, 等. 汽车用先进高强钢的应用现状和发展方向［J］. 材料导报A: 综述篇, 2011, 25(13): 101-104.
LI Yang, LIU Hanwu, DU Yunhui, et al. Applications and developments of AHSS in automobile industry ［J］. Materials Review, 2011, 25(13): 101-104.
［2］万子轩, 王敏, 焦海伦, 等. 热成形钢与低碳钢电阻凸焊的数值模拟［J］. 上海交通大学学报, 2015, 49(1): 80-85.
WAN Zixuan, WANG Min, JIAO Hailun, et al. Numerical simulation of projection welding between hot-stamped steel and low-carbon steel ［J］. Journal of Shanghai Jiao Tong University, 2015, 49(1): 80-85.
［3］林建平, 王立影, 田浩彬, 等. 超高强度钢板热冲压成形研究与进展［J］. 热加工工艺, 2008, 37(21): 140-144.
LIN Jianping, WANG Liying, TIAN Haobin, et al. Research and progress of hot stamping of ultrahigh strength ［J］. Hot Working Technology, 2008, 37(21): 140-144.
［4］杨洪林, 张深根, 洪继要, 等. 22MnB5热冲压钢的研究进展［J］. 锻压技术, 2014, 39(1): 1-5.
YANG Honglin, ZHANG Shengen, HONG Jiyao, et al. Development research on 22MnB5 hot stamping steel ［J］. Forging and Stamping Technology, 2014, 39(1): 1-5.
［5］李辉平, 赵国群, 张雷, 等. 超高强度钢板热冲压及模内淬火工艺的发展现状［J］. 山东大学学报(工学版), 2010, 40(3): 69-74.
LI Huiping, ZHAO Guoqun, ZHANG Lei, et al. The development status of hot stamping and quenching of ultra high-strength steel ［J］. Journal of Shandong University: Engineering Science, 2010, 40(3): 69-74.
［6］叶永盛, 单忠德, 王宝雨, 等. 防撞梁热冲压成形温度场研究［J］. 金属热处理, 2014, 39(3): 138-141.
YE Yongsheng, SHAN Zhongde, WANG Baoyu, et al. Reaearch on temperature field of door beam during hot stamping ［J］. Heat Treatment of Metals, 2014, 39(3): 138-141.
［7］韩小强, 于宏元, 盈亮, 等. 热冲压关键工艺参数对零件力学性能影响研究［J］. 锻压装备与制造技术, 2013, 48(4): 58-62.
HAN Xiaoqiang, YU Hongyuan, YING Liang, et al. Rule research on strain paths during deep drawing process of high strength steel DP590 ［J］. China Me-talforming Equipment and Manufacturing Technology, 2013, 48(4): 58-62.
［8］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.
［9］GHIOTTI A, BRUSCHI S, SGARABOTTO F, et al. Tribological performances of Zn-based coating in direct hot stamping ［J］. Tribology International, 2014, 78(4): 142-151.
［10］MU Y, WANG B, HUANG M, et al. Investigation on tribological characteristics of boron steel 22MnB5-tool steel H13 tribopair at high temperature ［J］. Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2017, 231(2): 165-175.
［11］STOTT F H. The role of oxidation in the wear of alloys ［J］. Tribology International, 1998, 31(1-3): 61-71.
［12］TAKEDA M, ONISHI T, NAKAKUBO S, et al. Physical properties of iron-oxide scales on Si-containing steels at high temperature ［J］. Materials Tran-sactions, 2009, 50(9): 2242-2246.
［13］陈康敏, 王树奇, 杨子润, 等. 钢的高温氧化磨损及氧化物膜的研究［J］. 摩擦学学报, 2008, 28 (5): 475-479.
CHEN Kangmin, WANG Shuqi, YANG Zirun, et al. High temperature wear and oxide film of steels ［J］. Tribology, 2008, 28 (5): 475-479.
［14］CHANG Y, TANG X, ZHAO K, et al. Investigation of the factors influencing the interfacial heat transfer coefficient in hot stamping ［J］. Journal of Materials Processing Technology, 2016, 228: 25-33.
［15］HARDELL J, HERNANDEZ S, MOZGOVOY S, et al. Effect of oxide layers and near surface transformations on friction and wear during tool steel and boron steel interaction at high temperatures ［J］. Wear, 2015, 330: 223-229.
