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首页> 外文期刊>ISIJ international >Evaluation of Sliding Wear Resistant Property of C.P. Titanium and SP-700 Titanium Alloy Surface-hardened by Ar-5%C0 Gas
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Evaluation of Sliding Wear Resistant Property of C.P. Titanium and SP-700 Titanium Alloy Surface-hardened by Ar-5%C0 Gas

机译：C.P.的滑动耐磨性评估钛和SP-700钛合金经Ar-5％C0气体表面硬化

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摘要

Sliding wear resistant properties of C.P. titanium and SP-700 alloy surface-hardened by Ar-5%CO gas were evaluated using a counterpart material of a bearing steel, JIS SUJ-2 steel and Nishihara type of sliding wear testing machine. In the latter, two disk specimens were rotated at different rotating speeds under a given compressive applied load, yielding a sliding ratio of 20%. Wear tests were repeated intermittently for several times, and a respective test time period in each series of wear tests was primarily varied. The mass loss in both disks was measured after each test. Wear resistance of annealed C.P. titanium without surface hardening was inferior to that of annealed SUJ-2 steel, but surface hardened C.P. titanium resulted in superior wear resistance over quench-tempered SUJ-2 steel with a hardness of 720 in Hv. Observation results of worn surfaces in both disks indicate that preferential wear occurred in the convex region of a furrow-like pattern formed by a lathe machining, resulting in a reduction of surface roughness values with wear progress. When a respective test time period was extended to 21.6ks, adhesive wear took place between worn surfaces in both specimens, and the mass loss ratio in titanium disk increased at a much higher rate compared with that of a respective test time period of less than 14.4 ks. The steel debris torn off from worn surface of SUJ-2 steel disk was observed to adhere to the worn surface in surface hardened C.P. titanium disk. Wear resistant property of surface hardened SP-700 alloy was also superior to quench-tempered SUJ-2 steel.
机译：C.P.的滑动耐磨性能使用轴承钢，JIS SUJ-2钢和Nishihara型滑动磨损试验机的配套材料评估了钛和经Ar-5％CO气体表面硬化的SP-700合金。在后者中，两个圆盘样品在给定的压缩施加载荷下以不同的转速旋转，产生20％的滑动率。磨损测试会间歇性地重复几次，并且每个磨损测试系列中各自的测试时间段主要有所不同。每次测试后测量两个盘的质量损失。退火C.P.的耐磨性没有表面硬化的钛比退火的SUJ-2钢要差，但是表面硬化的C.P.钛具有优于淬火回火的SUJ-2钢的优异耐磨性，其硬度为720 in Hv。在两个盘中磨损表面的观察结果表明，优先磨损发生在通过车床加工形成的沟槽状图案的凸形区域中，导致表面粗糙度值随着磨损的进行而降低。当相应的测试时间延长至21.6ks时，两个样品的磨损表面之间都发生了粘着磨损，并且钛圆盘的质量损失率与相应的不到14.4的测试时间相比以更高的速率增加。 ks。观察到从SUJ-2钢盘的磨损表面撕下的钢屑粘附在表面硬化的C.P.钛盘。表面硬化的SP-700合金的耐磨性也优于淬火的SUJ-2钢。

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