低Ti含量(0~0.15%)对高强钢耐磨性的影响

doi:10.13251/j.issn.0254-6051.2023.05.017

摘要/Abstract

摘要： 针对0~0.15%不同低Ti含量高强试验钢,利用万能磨损试验机进行磨损试验,并对试验钢组织、析出相及磨损形貌进行分析。结果表明,试验钢中析出相主要为TiC,其形貌为多边形、椭圆形、长条形、圆形,尺寸有大颗粒(横截面积＞100 μm²)、微米级(横截面积1~100 μm²)、亚微米级(横截面积＜1 μm²)。对耐磨性提升起主要作用的为微米级析出相,亚微米级析出相对耐磨性影响较小,大颗粒析出相对耐磨性起负作用。随着Ti含量增加,亚微米级、微米级析出相数量呈线性增加,当Ti含量≥0.10%时,出现大颗粒析出相。当Ti含量为0.10%时,试验钢板的耐磨性最好。

关键词: Ti含量, 高强钢, 析出相, 磨损试验, 耐磨性

Abstract: Effect of low Ti content in range of 0-0.15% on wear resistance of a high strength tested steel was investigated by using a universal wear testing machine, and the microstructure, precipitate and wear morphology were analyzed. The results show that the precipitates in the tested steels are mainly TiC, with polygonal, oval, rectangular and circular shapes. The sizes of the precipitates can be classified into three levels based on their cross sectional area: large-sized (>100 μm²), micron-sized (1-100 μm²), and submicron-sized (<1 μm²). The micron-sized precipitates play a major role in improving wear resistance, while the effect of submicron-sized precipitates is less, and the large-sized precipitates have a negative effect. With the increase of Ti content, both the amounts of submicron- and micron-sized precipitates increase linearly, while the large-sized precipitates begin to appear when the Ti content is ≥0.10%. Accordingly, the highest wear resistance is obtained when the Ti content is 0.10%.

Key words: Ti content, high strength steel, precipitate, wear test, wear resistance

中图分类号:

TG142.1⁺3

陆春洁, 邵春娟, 镇凡, 曲锦波. 低Ti含量(0~0.15%)对高强钢耐磨性的影响[J]. 金属热处理, 2023, 48(5): 104-109.

Lu Chunjie, Shao Chunjuan, Zhen Fan, Qu Jinbo. Effect of low Ti content (0-0.15%) on wear resistance of high strength steel[J]. Heat Treatment of Metals, 2023, 48(5): 104-109.

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