摘要
在530℃和560℃对3Cr13钢进行了4、8和16 h离子渗氮,利用9XB-PC金相显微镜、D8-FOCUSX射线衍射、HV-1000IS显微硬度计、CPA-225D电子天平和CS310电化学工作站,对改性层的截面显微组织、表面层相组成、硬度、质量增加和耐腐蚀性能进行了测试。试验结果表明,3Cr13钢530℃渗氮4、8和16 h后致密层厚度分别为96、116、149μm,560℃渗氮4、8和16 h后致密层厚度分别为105、164、172μm,渗氮致密层的厚度随渗氮时间和温度的增加而增加;3Cr13钢530℃渗氮4、8和16 h后致密层截面平均硬度分别为1062.8、1084.0、1155.7 HV0.05,560℃渗氮4、8和16 h后,致密层截面平均硬度分别为1126.4、924.3、726.0 HV0.05。3Cr13钢530℃渗氮后改性层耐蚀性提高,4 h改性层耐蚀性最好,16 h次之,8 h改性层的耐蚀性接近未渗氮试样;与未渗氮试样相比,3Cr13钢560℃渗氮4 h后改性层的耐蚀性提高,8 h和16 h后改性层的耐蚀性降低。
Plasma nitriding for 3Cr13 steel was carried out at 530 ℃ and 560 ℃ for 4 h,8 h and 16 h,respectively. Microstructure,phase composition,microhardness,mass gain per area and corrosion resistance of the nitrided layer were characterized by optical microscopy,XRD,microhardness tester,analytical balance and electrochemical workstation. After nitriding at 530 ℃ for 4,8 and 16 h,compact layer depths of 3Cr13 steel are 96,116 and 149 μm,respectively; and at 560 ℃ for 4,8 and 16 h,the compact layer depths are 105,164 and172 μm,respectively. It is concluded that the compact layer depth increases with the increase of nitriding temperature and nitriding time.After nitriding at 530 ℃ for 4,8 and 16 h,the average microhardness of compact layer on 3Cr13 steel is 1062. 8,1084. 0 and 1155. 7 HV0. 05,respectively; and at 560 ℃ for 4,8 and 16 h,the average microhardness of compact layer on 3 Cr13 steel is 1126. 4、924. 3、726. 0 HV0. 05,respectively. After nitriding at 530 ℃,corrosion resistance of the modified layer is enhanced,in which,nitrided for 4 h is the best,for 16 h takes the second place,but for 8 h is close to the non-nitrided sample. When nitriding at 560 ℃ for 4 h,the corrosion resistance of the modified layer of 3Cr13 steel is improved comparing with that of the non-nitrided one,but it decreases when nitrided for 8 h and 16 h.
作者
由园
闫纪红
闫牧夫
李莉
孙熙罡
王超会
You Yuan;Yan Jihong;Yan Mufu;Li Li;Sun Xigang;Wang Chaohui(School of Mechatronics Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China;School of Materials Science and Engineering,Qiqihar University,Qiqihar Heilongjiang 161006,China;National Key Laboratory for Precision Hot Processing of Metals,School of Materials Science and Engineering,Harbin Institute of Technology,Harbin Heilongjiang 150001,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第8期193-197,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51401113
51371070)
黑龙江省自然科学基金(E2016069
E2015044)
黑龙江省博士后资助经费(LBHZ16061)
黑龙江省教育厅基本科研业务专项(齐齐哈尔大学科研项目135209204)
