| 引用本文: | 张贺佳,张俊粉,李吉伟,王宝华,李国民,魏亮亮.Cu合金化对Cr9Mo1钢耐腐蚀及力学性能的影响[J].材料科学与工艺,2018,26(4):73-79.DOI:10.11951/j.issn.1005-0299.20170302. |
| ZHANG Hejia,ZHANG Junfen,LI Jiwei,WANG Baohua,LI Guomin,WEI Liangliang.Effects of Cu alloying on corrosion resistance and mechanical properties of Cr9Mo1 steel[J].Materials Science and Technology,2018,26(4):73-79.DOI:10.11951/j.issn.1005-0299.20170302. |
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| 摘要: |
| 为了研究Cu元素对含Mo高Cr钢耐腐蚀性及力学性能的影响，本文通过添加Cu元素和热轧工艺，制备了含有0.2% (质量分数) Cu元素的两组不同含C量的Cr9Mo1钢.利用拉伸试验机、光学显微镜(OM)及盐雾试验箱等，对比研究了添加Cu元素前后，Cr9Mo1钢力学性能、组织形貌及耐盐雾腐蚀性能的变化.结果表明，添加Cu元素均可显著提高Cr9Mo1钢的耐腐蚀性，但对力学性能及组织形貌无显著影响.低C钢组添加Cu元素后耐腐蚀性显著提高，强度和延伸率仅略有提高；高C钢组添加Cu元素后耐腐蚀性显著提高，强度略有提高，延伸率有所降低.热轧后的低C钢组的基体组织为混晶铁素体，高C钢组的基体为马氏体组织和少量δ铁素体.C含量的多少主要影响钢的力学性能，对耐腐蚀性的影响无显著差异.相较于含C量低的Cr9Mo1钢，含C量高的Cr9Mo1钢强度较高、塑性较差，但耐腐蚀性基本相同.
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| 关键词: Cu合金化 Cr9Mo1钢 耐腐蚀性 力学性能 |
| DOI：10.11951/j.issn.1005-0299.20170302 |
| 分类号:TG174.2 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(U1660205). |
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| Effects of Cu alloying on corrosion resistance and mechanical properties of Cr9Mo1 steel |
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ZHANG Hejia1, ZHANG Junfen1, LI Jiwei1, WANG Baohua1, LI Guomin2, WEI Liangliang3
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(1.Research Center of Vanadium & Titanium Engineering Technology of Chengde Branch, Co., Ltd., Hesteel Group Co., Ltd., Chengde 067002, China; 2.Inspection Test Center of Chengde Branch, Co., Ltd., Hesteel Group Co., Ltd., Chengde067102, China; 3.State Key Laboratory of Rolling and Automation(Northeastern University),Shenyang 110819,China)
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| Abstract: |
| In order to study the influence of Cu elements on the corrosion resistance and mechanical properties of high Cr steel containing Mo, two kinds of Cr9Mo1 steel with 0.2%(massfraction)Cu but different contents of C were prepared by adding Cu and hot rolling technology. Mechanical properties, microstructure and corrosion resistance of the Cr9Mo1 steels were compared and studied before and after the addition of Cu by tensile test machine, optical microscope (OM) and salt fog test box. The results show that the corrosion resistance of the Cr9Mo1 steels could be improved remarkably by adding Cu, but their mechanical properties and microstructures were not significantly affected. In the low-carbon steel group, after the addition of Cu, the corrosion resistance was significantly improved, but the tensile strength and elongation were only slightly increased. In the high-carbon steel group, after the addition of Cu, the corrosion resistance was also markedly improved, and the increase of the tensile strength and decrease of the elongation were both small. After hot rolling, the matrix microstructure of the low-carbon steel group was ferrite while that of the high-carbon steel group was martensite and a small amount of δ-ferrite. The content of C mainly affected the mechanical properties of steel, and there was no significant influence on the corrosion resistance. Compared with the low-carbon Cr9Mo1 steel, the high-carbon Cr9Mo1 steel has higher strength but poorer plasticity, but their corrosion resistance is almost the same.
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| Key words: Cu alloyed Cr9Mo1 steel corrosion resistance mechanical properties |
