Vanadis 4 Extra模具钢的干滑动摩擦性能

发布时间：2018-01-19 04:27

本文关键词： Vanadis Extra钢临界载荷摩擦因数磨损率　出处：《材料热处理学报》2017年04期 　论文类型：期刊论文

【摘要】：采用"销-盘"摩擦磨损试验测试不同滑动速度下Vanadis 4 Extra和Cr12MoV模具钢干滑动严重磨损的临界载荷,通过SEM、EDS、OM观察磨损形貌并分析磨损机理及原因。结果表明:滑动速度增大,两种钢严重磨损的临界载荷均减小,Vanadis 4Extra和Cr12MoV两种钢严重磨损的临界载荷分别为:0.691 m/s范围内为900 N和600 N;0.921 m/s时为700 N和300 N。载荷小于临界载荷时以磨粒磨损为主,大于临界载荷之后Vanadis 4 Extra以氧化磨损为主,Cr12MoV为氧化磨损和塑性变形。在不同滑动速度及载荷下,Vanadis 4 Extra模具钢的耐磨性均高于Cr12MoV钢3~18.3倍。
[Abstract]:The critical load of dry sliding severe wear of Vanadis 4 Extra and Cr12MoV die steel under different sliding velocities was measured by "Pin-Disc" friction and wear test. The critical load of dry sliding of Cr12MoV die steel was measured by SEM. EDSOM was used to observe the wear morphology and to analyze the wear mechanism and cause. The results showed that the critical load of the two steels decreased with the increase of sliding speed. The critical loads for severe wear of Vanadis 4 extra and Cr12MoV steels are respectively 900N and 600N in the range of: 0.691 m / s; At 0.921 m / s, 700N and 300Ns, the abrasive wear is dominant when the load is less than the critical load. The oxidation wear and plastic deformation of Vanadis 4 Extra are mainly oxidation wear and plastic deformation after critical load. Under different sliding speed and load. The wear resistance of Vanadis 4 Extra die steel is 18.3 times higher than that of Cr12MoV steel.
【作者单位】：兰州工业学院材料工程学院;甘肃省高校绿色切削加工技术及其应用省级重点实验室;
【基金】：甘肃省高等学校科研项目(2016B-144,2016A-099) 国家自然科学基金(51361020)
【分类号】：TG142.45
【正文快照】： 传统的Cr12型模具钢具有高硬度、高强度、高耐磨性、易淬透及淬火变形小等优点,广泛用于制造形状复杂的重载冷作模具。然而,Cr12型的高碳高铬冷作模具钢中有大块共晶碳化物及较严重的网状碳化物,模具常常因为韧性不足而发生早期失效[1-4]。为此,中国引进、研制了几种高耐磨、

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