不同温度热‒冷循环处理对炮钢摩擦磨损性能的影响  

Effect of Heating-Cooling Cycles of Different Temperatures on Friction and Wear Properties of Gun Steel

作　　者：徐张 曹守范 杨国来[1] 梁医[1] XU Zhang;CAO Shou-fan;YANG Guo-lai;LIANG Yi(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《装备环境工程》2022年第7期58-65,共8页Equipment Environmental Engineering

基　　金：军委科技委基础加强重点项目(2019-JCJQ-ZD-133-04-02);南京理工大学大型仪器设备开放基金。

摘　　要：目的研究不同温度热–冷循环处理对炮钢摩擦磨损性能的影响及其磨损机理。方法将PCrNi3MoVA炮钢分别在400、800℃的加热温度下进行热–冷循环处理,采用立式万能摩擦磨损实验机在不同的滑动速度下测试炮钢销与H96黄铜盘配副时的摩擦磨损性能,记录摩擦系数,测量炮钢销和黄铜盘的磨损量。采用扫描电子显微镜和能谱仪测量磨损后的炮钢销表面形貌及化学成分,分析其磨损机理。结果热–冷循环处理对炮钢销在100 r/min滑动速度下的摩擦系数的影响较小。随着热–冷循环处理中加热温度的升高,炮钢销的磨损量增大,而黄铜盘的磨损量受炮钢销热–冷循环处理的影响较小。炮钢销的磨损表面可见明显的因材料塑性变形剥落造成的凹坑和沟槽。随着滑动速度的增大,800℃–室温循环处理后,炮钢销的摩擦系数降低,磨损量在400 r/min时最大,在800 r/min时反而下降到接近于0。分析磨损表面发现,800 r/min时,黄铜磨屑与炮钢磨屑发生掺杂混合,附着于炮钢销的磨损表面,从而影响了炮钢销的摩擦磨损性能。结论热–冷循环处理对炮钢销–黄铜盘摩擦副摩擦系数的影响较小,但随着热–冷循环中加热温度的升高,炮钢销的耐磨损性能下降。滑动速度对炮钢销摩擦系数和磨损量的影响都较大,高的滑动速度下,黄铜磨屑与炮钢磨屑混合,并附着于炮钢销磨损表面,改变炮钢销的磨损机理。The objective of this paper is to study the effect of heating-cooling cycles of different temperatures on the friction and wear properties of gun steel and its wear mechanism.Heating-cooling cycles were performed on the PCrNi3MoVA gun steel at 400℃and 800℃,respectively.A universal tribometer was used to test the friction and wear properties of the gun steel pin paired with H96 brass plate at different sliding speeds.The friction coefficient was recorded and the wear of the gun steel pin and brass plate was quantified.The worn surface morphology and chemical composition of the gun steel pin was observed and analyzed using scanning electron microscope and energy dispersive spectrometer,and the wear mechanism was analyzed.The results showed the heating-cooling cycles had little effect on the friction coefficient of the gun steel pin at the sliding speed of 100 r/min.With the increase of heating temperature in the heating-cooling cycles,the wear loss of the gun steel pin increased,while the wear loss of the brass disk was little affected by the heating-cooling cycles of the gun steel pin.The worn surface of the gun steel pin after heating-cooling cycles showed obvious pits and grooves caused by material plastic deformation induced spalling.When the sliding speed increased,the friction coefficient of the gun steel pin decreased,and the wear loss reached the maximum at 400 r/min,but decreased to almost 0 at 800 r/min.The worn surface analysis showed that,at 800 r/min,the friction and wear properties of the gun steel pin were affected by the mixing of brass and gun steel wear debris.It is concluded that the heating-cooling cycles have little effect on the friction coefficient of the gun steel-brass friction pair,but with the increase of heating temperature in the heating-cooling cycles,the wear resistance of the gun steel pin decreases.The sliding speed has great influence on friction coefficient and wear loss of the gun steel pin.At high sliding speed,the mixing of brass and gun steel wear debris exists and attache

关 键 词：火炮挤进 炮钢 热–冷循环 摩擦 磨损 高温氧化 

分 类 号：TJ04[兵器科学与技术—兵器发射理论与技术] TG115.58[金属学及工艺—物理冶金]