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| 摘要: |
| 在Q235钢表面进行等离子渗铬和铬-钼、钨-钼共渗,然后进行等离子超饱和渗碳、淬火及回火处理,获得表面强化层.并对处理后的材料进行了拉伸试验.结果表明：基体的屈服强度和抗拉强度分别为669.48 MPa和696.74MPa,而经过表面复合强化处理后,材料的屈服强度最低为834.53 MPa,最高为1310.17 MPa;抗拉强度最低为957.38MPa,最高为1508.19 MPa.极大地改善了Q235钢的拉伸性能.而且经4 h等离子渗铬及后续热处理后,材料的拉伸强度提高更显著. |
| 关键词: 等离子表面合金化 渗金属 渗碳 拉伸强度 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目（50374050）;山西省自然科学基金资助项目（20031050） |
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| Tensile Strength of Q235 Steel After Compound Surface Strengthening Treatment |
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WANG Jian-zhong1, KUI Xiao-yun1, XU Jin-yong1,2, LIU Yan-ping1, GAO Yuan1, XU Zhong1
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| Abstract: |
| Cr, Cr-Mo and W-Mo were permeated into the surface of Q235 steel, and then the surface was strengthened by plasma supersaturated carburizing, quenching and tempering treatments. The tensile experiment was carried out after treatment. The results showed that the yield and tensile strength of the substrate were 669.48 MPa and 696.74 MPa respectively, while the minimum yield strength was 834.53 MPa and maximum was 1301.17 MPa; the minimum tensile strength was 957.38 MPa and maximum was 1508.19 MPa after surface compound treatment. The tensile properties of Q235 steel were greatly enhanced. At the same time the tensile strength of steel was improved more obviously through plasma Cr permeation for 4 h and subsequent heat treatment. |
| Key words: plasma surface alloying metallic cementation carburizing tensile strength |
