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首页> 外文期刊>ISIJ international >Microstructure, Mechanical Properties and Wear Resistance of Low Alloy Abrasion Resistant Martensitic Steel Reinforced with TiC Particles
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Microstructure, Mechanical Properties and Wear Resistance of Low Alloy Abrasion Resistant Martensitic Steel Reinforced with TiC Particles

机译：用TIC颗粒加固低合金耐磨马氏钢的微观结构，力学性能和耐磨性

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摘要

The TiC-reinforced low alloy abrasion resistant martensitic steel was developed to improve the wear resistance without increasing hardness through traditional melting and casting technology and subsequent hot rolling and heat treatment processes. The new wear resistant steel was reinforced with micron- and nano-sized TiC particles. The phase diagram calculated by Thermal-Calc software indicated that micron-sized TiC particles precipitates towards the end of solidification. The hot rolling process changed the distribution of initial micron-sized TiC particles and transformed it from a segregated distribution to a uniform distribution. Amounts of nano-sized precipitation was obtained via pre-tempering treatment, which remarkably improved the three-body abrasive wear performance of TiC reinforced steel at the expense of a little ductility and toughness. The steel reinforced with only micron-sized TiC particles, whose wear resistance was 1.35 times that of conventional abrasion resistant steel (NM500). However, the steel reinforced with micron- and nano-sized TiC particles, whose wear resistance increased to 1.5 times that of NM500. The wear mechanism of conventional steel was micro-cutting/micro-ploughing, while the wear mechanism of TiC-reinforced steel was spalling and fatigue, because the micro-cutting was efficiently resisted by TiC particles.
机译：通过传统熔化和浇铸技术和随后的热轧和热处理过程，开发了TIC加强的低合金耐磨马氏钢，以改善耐磨性而不提高硬度。用微米和纳米尺寸的TIC颗粒加固新的耐磨钢。通过热计算软件计算的相图表明微米尺寸的TIC颗粒朝向凝固结束沉淀。热轧工艺改变了初始微米尺寸的TiC颗粒的分布，并将其从分离的分布转变为均匀分布。通过预回火处理获得纳米沉淀的量，以少延展性和韧性，显着提高了TIC增强钢的三体磨料磨损性能。仅用微米尺寸的TIC颗粒加固的钢，其耐磨性为常规耐磨钢（NM500）的耐磨性为1.35倍。然而，用微米和纳米大小的TiC颗粒加固的钢，其耐磨性增加到NM500的1.5倍。常规钢的磨损机构是微切/微耕的，而TIC钢筋的磨损机理剥落和疲劳，因为微切割被TIC颗粒有效地抵抗。

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