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首页> 外文期刊>Journal of Materials Engineering and Performance >Effects of Deep Cryogenic Treatment on the Wear Resistance and Mechanical Properties of AISI H13 Hot-Work Tool Steel
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Effects of Deep Cryogenic Treatment on the Wear Resistance and Mechanical Properties of AISI H13 Hot-Work Tool Steel

机译：深低温处理对AISI H13热作工具钢的耐磨性和力学性能的影响

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摘要

In this study, a number of wear and tensile tests were performed to elucidate the effects of deep cryogenic treatment on the wear behavior and mechanical properties (hardness and tensile strength) of AISI H13 tool steel. In accordance with this purpose, three different heat treatments (conventional heat treatment (CHT), deep cryogenic treatment (DCT), and deep cryogenic treatment and tempering (DCTT)) were applied to tool steel samples. DCT and DCTT samples were held in nitrogen gas at -145 degrees C for 24 h. Wear tests were conducted on a dry pin-on-disk device using two loads of 60 and 80 N, two sliding velocities of 0.8 and 1 m/s, and a wear distance of 1000 m. All test results showed that DCT improved the adhesive wear resistance and mechanical properties of AISI H13 steel. The formation of small-sized and uniformly distributed carbide particles and the transformation of retained austenite to martensite played an important role in the improvements in the wear resistance and mechanical properties. After cleavage fracture, the surfaces of all samples were characterized by the cracking of primary carbides, while the DCT and DCTT samples displayed microvoid formation by decohesion of the fine carbides precipitated during the cryo-tempering process.
机译：在这项研究中，进行了许多磨损和拉伸试验，以阐明深低温处理对AISI H13工具钢的磨损行为和机械性能（硬度和拉伸强度）的影响。根据这一目的，对工具钢样品进行了三种不同的热处理（常规热处理（CHT），深低温处理（DCT），深低温处理和回火（DCTT））。 DCT和DCTT样品在氮气中于-145摄氏度下保持24小时。在干式针盘设备上进行磨损测试，使用两个负载分别为60和80 N，两个滑动速度为0.8和1 m / s，磨损距离为1000 m。所有测试结果表明，DCT改善了AISI H13钢的胶粘剂耐磨性和机械性能。小尺寸且均匀分布的碳化物颗粒的形成以及残余奥氏体向马氏体的转变在改善耐磨性和机械性能方面起着重要作用。劈裂后，所有样品的表面均以一次碳化物的开裂为特征，而DCT和DCTT样品则由于在低温回火过程中析出的细小碳化物的脱粘而显示出微孔的形成。

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