固溶温度对节约型双相不锈钢组织及性能的影响
|
摘要
本工作制得节约型NSSC 2120双相不锈钢,采用光学显微镜(OM)、扫描电镜(SEM)、万能材料试验机及电化学工作站研究了固溶温度(1000℃、1050℃、1100℃、1150℃、1200℃)对其组织、力学性能及耐蚀性能的影响,同时制备LDX 2101、SUS 304不锈钢并进行了对比分析。结果表明:当固溶温度由1 000℃升至1 050℃时,长条、针状的二次奥氏体(γ_2)演变成铁素体,使NSSC 2120双相不锈钢的抗拉强度及耐蚀性能得到提升;温度提高至1150℃时,铁素体含量的增加与细小、均匀的奥氏体相共同导致NSSC 2120双相不锈钢的抗拉强度达到峰值(632.5 MPa),起主导因素的奥氏体相形态使得腐蚀电流密度降至最低值(2.247×10~(-6)μA·cm~(-2));固溶温度进一步提高至1200℃时,两相比例虽接近1∶1,但NSSC 2120双相不锈钢的抗拉强度及耐蚀性能大幅下降,这与奥氏体尖锐化有关。与节约型双相不锈钢LDX 2101和SUS 304奥氏体不锈钢相比,NSSC 2120双相不锈钢原材料成本更低,且在最佳固溶温度下其力学性能及耐点蚀性能都更好。
The effect of solution temperatures(1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃) on the microstructure, mechanical properties and corrosion resistance of NSSC 2120 duplex stainless steel has been investigated by OM, SEM, tensile and electrochemical experiments. The results showed that, as the temperature increased from 1000 ℃ to 1050 ℃, the strip or needle-shaped secondary austenite developed into ferrite, improving the tensile strength and corrosion resistance of NSSC 2120 duplex stainless steel. When the solution temperature went up to 1150 ℃, both the increment of ferrite content and the tiny uniform austenite induced the tensile strength to reach a peak(632.5 MPa). As the dominant factor, the austenite resulted in a minimum corrosion current density of 2.247×10~(-6) μA·cm~(-2). When the solution temperature rised to 1200 ℃, although the ratio of the two phases is close to 1∶1, the tensile strength and corrosion resistance decrease significantly. This is attributed to the austenite sharpening. Compared with the economical duplex stainless steel LDX 2101 and SUS 304 austenitic stainless steel, NSSC steel is excellent in the respect of the cost, the mechanical properties and pitting corrosion resistance.
The effect of solution temperatures(1000 ℃, 1050 ℃, 1100 ℃, 1150 ℃, 1200 ℃) on the microstructure, mechanical properties and corrosion resistance of NSSC 2120 duplex stainless steel has been investigated by OM, SEM, tensile and electrochemical experiments. The results showed that, as the temperature increased from 1000 ℃ to 1050 ℃, the strip or needle-shaped secondary austenite developed into ferrite, improving the tensile strength and corrosion resistance of NSSC 2120 duplex stainless steel. When the solution temperature went up to 1150 ℃, both the increment of ferrite content and the tiny uniform austenite induced the tensile strength to reach a peak(632.5 MPa). As the dominant factor, the austenite resulted in a minimum corrosion current density of 2.247×10~(-6) μA·cm~(-2). When the solution temperature rised to 1200 ℃, although the ratio of the two phases is close to 1∶1, the tensile strength and corrosion resistance decrease significantly. This is attributed to the austenite sharpening. Compared with the economical duplex stainless steel LDX 2101 and SUS 304 austenitic stainless steel, NSSC steel is excellent in the respect of the cost, the mechanical properties and pitting corrosion resistance.
引文
1 Feng H,Zhou X Y,Liu H,et al.Journal of Iron and Steel Research,2015,17(4),1(in Chinese).丰涵,周晓玉,刘虎,等.钢铁研究学报,2015,27(4),1.
2 Sun Q Q,Zhong H G,Cao X,et al.Shanghai Metals,2012,34(4),38(in Chinese).孙卿卿,仲红刚,曹欣,等.上海金属,2012,34(4),38.
3 Lothongkum G,Wongpanya P,Morito S,et al.Corrosion Science,2006,48(1),137.
4 Yoda K,Suyalatu,Nomura N,et al.Acta Biomaterialia,2012,8 (7),2856.
5 Espitia L A,Dong H,Li X Y,et al.Wear,2015,332,1070.
6 Li J,Xu Y L,Xiao X S,et al.Materials Science and Engineering A,2009,527(1-2),245.
7 Chen Yulai,Luo Zhaoyin,Li Jingyuan.Acta Metallurgica Sinica,2015,51(9),1085(in Chinese).陈雨来,罗照银,李静媛.金属学报,2015,51(9),1085.
8 Yuan C,Guo J T,Zhou L Z.Advanced Materials Research,2011,278,472.
9 Gong L,Chen B,Yang Y Q,et al.Materials Science and Engineering A,2017,701,111.
10 Quan Rong.Development of low cost dual phase stainless steel with high performance price ratio.Word Metals,2016-07-26-B14(in Chinese).全荣.高性价比低合金双相不锈钢的开发.世界金属导报,2016-07-26(B14).
11 Ramirez A J,Lippold J C,Brandi S D.Metallurgical and Materials Transactions A,2003,34(8),1575.
12 Wu Jiu.Duplex stainless steel,Metallurgical Industry Press,China,1999 (in Chinese).吴玖.双相不锈钢,冶金工业出版社,1999.
13 Zheng Yugui,Yao Zhiming,Ke Wei.Corrosion Science and Protection Technology,2000,12(1),38(in Chinese).郑玉贵,姚治铭,柯伟.腐蚀科学与防护技术,2000,12(1),38.
14 Russell D,Kane D.Influence of velocity interactions of oil composition,Inter Corrosion International Inc,New York,2000.
15 Forgas J A,Otubo J,Magnabosco R.Journal of Aerospace Technology and Management,2016,8(3),357.
16 Wang Lixin,Li Huabing,Li Guoping,et al.Chinese Journal of Materials Research,2016,30(12),888 (in Chinese).王立新,李花兵,李国平,等.材料研究学报,2016,30(12),888.
17 Xiang Hongliang,Huang Weilin,Liu Dong,et al.Acta Metallurgica Si-nica,2010,46(3),304(in Chinese).向红亮,黄伟林,刘东,等.金属学报,2010,46(3),304.
18 Wang Fengping,Kang Wanli,Jing Heping.Principles,methods and applications of corrosion electrochemistry,Chemical Industry Press,China,2008 (in Chinese).王凤平,康万利,敬和平.腐蚀电化学原理、方法及应用,化学工业出版社,2008.
19 Zheng Chuanbo,Chen Xi.Journal of Guangxi Academy of Sciences,2016,32(3),161(in Chinese).郑传波,陈曦.广西科学院学报,2016,32(3),161.
20 Zhang Yan,Li Qian,Wang Shenggang.Journal of Materials Enginee-ring,2016,44(1),108(in Chinese).张艳,李倩,王胜刚.材料工程,2016,44(1),108.
21 Muthupandi V,Srinivasan P B,Seshadri S K,et al.Science and Techno-logy of Weld and Joining,2004,9(1),47.
22 Song Zhigang,Chen Bin,Zheng Wenjie,et al.Journal of Iron and Steel Research International,2007,19(6),69(in Chinese).宋志刚,陈斌,郑文杰,等.钢铁研究学报,2007,19(6),69.
23 Shi Lin.Effect of bimodal structure and nanocrystalline on pitting corrosion of 304 austenitic stainless steel.Master’s Thesis,South China University of Technology Guangzhou,China,2016 (in Chinese).石林.双尺度结构及单一纳米晶结构对304奥氏体不锈钢点蚀性能的影响.硕士学位论文,华南理工大学,2016.
24 Liu Jingjun,Lin Yuzhen,Yong Xingyue,et al.Corrosion Science and Protection Technology,2002,14(3),129(in Chinese).刘景军,林玉珍,雍兴跃,等.腐蚀科学与防护技术,2002,14(3),129.
25 Moayed M H,Laycock N J,Newman R C.Corrosion Science,2003,45,1203.
26 Lijas M,Johansson P,Liu H P,et al.Steel Research International,2008,79 (6),466.
27 General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China,Standardization Administration of the People’s Republic of China.GB/T 1220-2007.Stainless steel bars.PRC standard,2007 (in Chinese).中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 1220-2007.不锈钢棒.中华人民共和国国家标准,2007.
28 Liu Zhengshao,Chen Shaowen,Li Xiugui,et al.Marine Science,1986,10(4),5(in Chinese).刘正生,陈少文,李秀桂,等.海洋科学,1986,10(4),5.
29 Ma L,Hu S S,Shen J Q.Journal of Materials Engineering and Perfor-mance,2017,26(1),250.
2 Sun Q Q,Zhong H G,Cao X,et al.Shanghai Metals,2012,34(4),38(in Chinese).孙卿卿,仲红刚,曹欣,等.上海金属,2012,34(4),38.
3 Lothongkum G,Wongpanya P,Morito S,et al.Corrosion Science,2006,48(1),137.
4 Yoda K,Suyalatu,Nomura N,et al.Acta Biomaterialia,2012,8 (7),2856.
5 Espitia L A,Dong H,Li X Y,et al.Wear,2015,332,1070.
6 Li J,Xu Y L,Xiao X S,et al.Materials Science and Engineering A,2009,527(1-2),245.
7 Chen Yulai,Luo Zhaoyin,Li Jingyuan.Acta Metallurgica Sinica,2015,51(9),1085(in Chinese).陈雨来,罗照银,李静媛.金属学报,2015,51(9),1085.
8 Yuan C,Guo J T,Zhou L Z.Advanced Materials Research,2011,278,472.
9 Gong L,Chen B,Yang Y Q,et al.Materials Science and Engineering A,2017,701,111.
10 Quan Rong.Development of low cost dual phase stainless steel with high performance price ratio.Word Metals,2016-07-26-B14(in Chinese).全荣.高性价比低合金双相不锈钢的开发.世界金属导报,2016-07-26(B14).
11 Ramirez A J,Lippold J C,Brandi S D.Metallurgical and Materials Transactions A,2003,34(8),1575.
12 Wu Jiu.Duplex stainless steel,Metallurgical Industry Press,China,1999 (in Chinese).吴玖.双相不锈钢,冶金工业出版社,1999.
13 Zheng Yugui,Yao Zhiming,Ke Wei.Corrosion Science and Protection Technology,2000,12(1),38(in Chinese).郑玉贵,姚治铭,柯伟.腐蚀科学与防护技术,2000,12(1),38.
14 Russell D,Kane D.Influence of velocity interactions of oil composition,Inter Corrosion International Inc,New York,2000.
15 Forgas J A,Otubo J,Magnabosco R.Journal of Aerospace Technology and Management,2016,8(3),357.
16 Wang Lixin,Li Huabing,Li Guoping,et al.Chinese Journal of Materials Research,2016,30(12),888 (in Chinese).王立新,李花兵,李国平,等.材料研究学报,2016,30(12),888.
17 Xiang Hongliang,Huang Weilin,Liu Dong,et al.Acta Metallurgica Si-nica,2010,46(3),304(in Chinese).向红亮,黄伟林,刘东,等.金属学报,2010,46(3),304.
18 Wang Fengping,Kang Wanli,Jing Heping.Principles,methods and applications of corrosion electrochemistry,Chemical Industry Press,China,2008 (in Chinese).王凤平,康万利,敬和平.腐蚀电化学原理、方法及应用,化学工业出版社,2008.
19 Zheng Chuanbo,Chen Xi.Journal of Guangxi Academy of Sciences,2016,32(3),161(in Chinese).郑传波,陈曦.广西科学院学报,2016,32(3),161.
20 Zhang Yan,Li Qian,Wang Shenggang.Journal of Materials Enginee-ring,2016,44(1),108(in Chinese).张艳,李倩,王胜刚.材料工程,2016,44(1),108.
21 Muthupandi V,Srinivasan P B,Seshadri S K,et al.Science and Techno-logy of Weld and Joining,2004,9(1),47.
22 Song Zhigang,Chen Bin,Zheng Wenjie,et al.Journal of Iron and Steel Research International,2007,19(6),69(in Chinese).宋志刚,陈斌,郑文杰,等.钢铁研究学报,2007,19(6),69.
23 Shi Lin.Effect of bimodal structure and nanocrystalline on pitting corrosion of 304 austenitic stainless steel.Master’s Thesis,South China University of Technology Guangzhou,China,2016 (in Chinese).石林.双尺度结构及单一纳米晶结构对304奥氏体不锈钢点蚀性能的影响.硕士学位论文,华南理工大学,2016.
24 Liu Jingjun,Lin Yuzhen,Yong Xingyue,et al.Corrosion Science and Protection Technology,2002,14(3),129(in Chinese).刘景军,林玉珍,雍兴跃,等.腐蚀科学与防护技术,2002,14(3),129.
25 Moayed M H,Laycock N J,Newman R C.Corrosion Science,2003,45,1203.
26 Lijas M,Johansson P,Liu H P,et al.Steel Research International,2008,79 (6),466.
27 General Administration of Quality Supervision,Inspection and Quarantine of the People’s Republic of China,Standardization Administration of the People’s Republic of China.GB/T 1220-2007.Stainless steel bars.PRC standard,2007 (in Chinese).中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 1220-2007.不锈钢棒.中华人民共和国国家标准,2007.
28 Liu Zhengshao,Chen Shaowen,Li Xiugui,et al.Marine Science,1986,10(4),5(in Chinese).刘正生,陈少文,李秀桂,等.海洋科学,1986,10(4),5.
29 Ma L,Hu S S,Shen J Q.Journal of Materials Engineering and Perfor-mance,2017,26(1),250.