Influence of Ultrasonic Surface Rolling Processing on Tribological Performance of 45 Steel and Its Mechanism
摘 要
采用超声表面滚压处理(USRP)技术对45钢表面进行强化处理,通过表面形貌和表层显微组织观察、表面粗糙度和摩擦磨损性能测试,研究了USRP对该钢摩擦学性能的影响及机理。结果表明:USRP试样的表面粗糙度由未处理试样的3.2 μm降低到0.23 μm;显微组织得到了细化,晶粒取向趋于随机分布,有大角度晶界出现;表面显微硬度比未处理试样的提高约56%,强化层厚度达到400 μm;USRP试样的摩擦因数小于未处理试样的,磨损量为未处理试样的1/4;未处理试样磨损过程中表面材料呈“片块状”脱落,磨损机制为黏着磨损,USRP试样磨损表面上存在犁皱形成的沟槽,磨损机制为磨粒磨损。
Abstract
The surface strengthening of 45 steel was carried out by the ultrasonic surface rolling processing (USRP) technique. Then the influence of USRP on the tribological performance of the steel and the mechanism were studied by means of the surface morphology and surface microstructure observation, surface roughness and friction and wear performance tests. The results show that the surface roughness of the USRP specimen decreased from 3.2 μm of the untreated specimen to 0.23 μm; the microstructure was refined, the grain orientation tended to be randomly distributed and the high-angle grain boundary was observed; the microhardness at the surface was about 56% higher than that of the untreated specimen, and the thickness of the strengthening layer was up to 400 μm; the friction coefficient of the USRP specimen was lower than that of the untreated specimen and the wear loss was 1/4 of the untreated specimen. The surface materials of the untreated specimen showed a piece-like peeling during the wear process with the wear mechanism of adhesive wear. While on the wear surface of USRP specimen, the ploughing formed grooves were observed and the wear mechanism was abrasive wear.
中图分类号 TG176 DOI 10.11973/jxgccl201708010
所属栏目 材料性能及应用
基金项目 国家自然科学基金资助项目(51565017);江西省自然科学基金资助项目(2012BAB206026);江西省教育厅资助项目(GJJ14424)
收稿日期 2017/1/1
修改稿日期 2017/6/13
网络出版日期
作者单位点击查看
备注张飞(1988-),男,安徽阜阳人,硕士研究生
引用该论文: ZHANG Fei,ZHAO Yuncai. Influence of Ultrasonic Surface Rolling Processing on Tribological Performance of 45 Steel and Its Mechanism[J]. Materials for mechancial engineering, 2017, 41(8): 44~48
张飞,赵运才. 超声表面滚压处理对45钢摩擦学性能的影响及机理[J]. 机械工程材料, 2017, 41(8): 44~48
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【9】陆晓峰,廖明刚,朱晓磊,等. 表面纳米化处理对Cr5Mo钢流动加速腐蚀性能的影响[J].机械工程材料,2014,38(5):66-70.
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【13】王炳英,尹宇,侯振波,等. X80钢超声表面滚压加工残余应力场的有限元模拟[J].机械工程材料,2015,39(9):80-83.
【14】刘洁.超声滚压加工对改善金属表面性能的研究[D].青岛:青岛科技大学,2013.
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【17】路军,靳丽,曾小勤,等.大塑性变形材料及变形机制研究进展[J].铸造工程,2008(1):32-36.
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【19】TAO N R, WANG Z B, TONG W P, et al. An investigation of surface nanocrystallization on mechanism in Fe induced by surface mechanical attrition treatment[J]. Acta Materialia, 2002,50(18):4603-4616.
【20】HUANG J Y, ZHU Y T, JIANG H, et al. Microstructures and dislocation configurations in nanostructured Cu processed by repetitive corrugation and straightening[J]. Acta Materialia, 2001,49(9):1497-1505.
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