18.热电厂给水管用含铜钢的形变析出强化行为研究

刘智彪¹，王海燕²，陈树明³，高雪云^2,3，吴志峰²

（1.北方联合电力有限责任公司包头第一热电厂，包头 014010；2.内蒙古科技大学材料与冶金学院，包头 014010；3.内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室，包头 014010）

关键词：‍‍含铜钢；热变形；正交实验；析出强化‍

中图分类号： TG142.1     文献标志码：A

摘要‍‍‍‍‍‍‍‍：使用Gleeble-1500D热模拟机，通过正交试验法对含铜低碳钢进行形变-析出强化工艺试验，利用扫描电子显微镜观察钢的显微组织，借助显微硬度计测试了钢的硬度，研究了变形温度、变形量和变形速率对试验钢强化效果的影响。结果表明：影响试验钢强化效果的主次顺序为变形量、变形温度、变形速率；趋势图显示，本实验条件下的最优方案为221组合，即880℃温度变形，变形量50%，变形速率3S^-1,以上结果可为热电厂给水管用钢的生产工艺控制提供实验依据。

LIU Zhibiao¹，WANG Haiyan²，CHEN Shuming³，GAO Xueyun^2,3，WU Zhifeng²

(1. Baotou First Power Plant, North United Power Co., Baotou 014010; 2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010; 3. Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resource, Baotou 014010)

Key words: Cu-containing steel; hot deformation; orthogonal experiment; precipitation strengthening

Abstract: Hot simulation on Cu containing low carbon steel was carried out to obtain its strengthening characteristics through strain hardening and precipitation process by means of orthogonal experiment, and Gleeble-1500D hot simulator was used for hot compression test. Microstructure of high purity steel containing copper was investigated by using scan electron microscope (SEM), and hardness was characterized by micro-hardness measurements. The effects of deformation temperature, reduction and deformation rate on the enhancement of the steel were analyzed by variance calculation. The result showed that strength of the steel was improved by strain inducing strengthening, which has relation with deformation temperature, reduction and deformation rate. The order of the three factors affecting the strengthening of the test steel is as follows: deformation rate, deformation temperature, and strain rate, which may provide experimental basis for the production process control of the steel for water supply pe in power plant.