高Ti低合金钢中TiC粒子的固溶及沉淀析出行为

doi:10.13251/j.issn.0254-6051.2020.04.022

金属热处理 ›› 2020, Vol. 45 ›› Issue (4): 110-114.DOI: 10.13251/j.issn.0254-6051.2020.04.022

高Ti低合金钢中TiC粒子的固溶及沉淀析出行为

刘罗锦, 梁小凯, 孙新军

钢铁研究总院工程用钢所, 北京 100081

收稿日期:2019-09-22 出版日期:2020-04-25 发布日期:2020-05-08
通讯作者: 孙新军,教授,博士,E-mail:fallbreeze@126.com
作者简介:刘罗锦(1993—),女,硕士研究生,主要从事耐磨钢研究,E-mail:liuluojin08@163.com

Solution and precipitating behaviors of TiC particles in high Ti low alloy steel

Liu Luojin, Liang Xiaokai, Sun Xinjun

Institute of Engineering Steel, Central Iron and Steel Research Institute, Beijing 100081, China

Received:2019-09-22 Online:2020-04-25 Published:2020-05-08

摘要/Abstract

摘要： 通过高温激光扫描共聚焦显微镜(Laser scanning confocal microscopy,LSCM)观察高Ti(0.6wt%Ti)低合金钢升温和降温过程中TiC粒子的演变规律,结合Thermo-Calc软件计算并借助OM、SEM、TEM等分析方法对试验钢中TiC粒子形貌和分布进行表征,研究TiC粒子的析出规律。试验结果表明:不同温度阶段生成的TiC粒子形态各异,按照粒径由大到小顺序逐渐从基体中析出,高温对小尺寸TiC粒子析出的抑制作用更为显著。高温下多个尺寸较大的相邻TiC粒子会在试样表面发生聚集形成絮状形貌,高温固相析出的TiC粒子由球体不稳定状态向立方体稳定形貌转变,粗化程度可忽略。

关键词: 高Ti低合金钢, TiC粒子形貌, 析出行为

Abstract: Evolution of TiC particles during heating and cooling of high Ti (0.6wt% Ti) low alloy steel was observed by means of high temperature laser scanning confocal microscopy (LSCM). The morphology and distribution of TiC particles in the steel were analyzed by means of OM, SEM, EDS, etc and combined with Thermo-Calc software calculation. The precipitating behaviors of TiC particles were studied. The test results show that the TiC particles formed in different temperature stages have different shapes, and gradually precipitate from the matrix according to the particle diameter order from large to small. The inhibition of precipitation of small-sized TiC particles by high temperature is more remarkable. At high temperature, a plurality of adjacent large-sized TiC particles aggregate on the surface to form a flocculent morphology. And TiC particles precipitated at high temperature solid phase change from a spherical unstable state to a cubic stable morphology, but the degree of coarsening is negligible.

Key words: high Ti low alloy steel, TiC particle morphology, precipitation behavior

中图分类号:

TG142.33

刘罗锦, 梁小凯, 孙新军. 高Ti低合金钢中TiC粒子的固溶及沉淀析出行为[J]. 金属热处理, 2020, 45(4): 110-114.

Liu Luojin, Liang Xiaokai, Sun Xinjun. Solution and precipitating behaviors of TiC particles in high Ti low alloy steel[J]. Heat Treatment of Metals, 2020, 45(4): 110-114.

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高Ti低合金钢中TiC粒子的固溶及沉淀析出行为

Solution and precipitating behaviors of TiC particles in high Ti low alloy steel

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