沿海建筑用00Cr25Ni7Mo4N双相不锈钢的热处理与性能
|
摘要
采用光学显微镜、扫描电镜、拉伸试验机和电化学工作站等,研究了固溶温度对00Cr25Ni7Mo4N双相不锈钢显微组织、力学性能和耐腐蚀性能的影响。结果表明,热轧和固溶温度为1025～1200℃时双相钢的显微组织都为铁素体+奥氏体双相组织,随着固溶温度升高,双相钢中α相含量不断增大,γ相含量不断减小,在固溶温度为1175℃时,双相钢中α∶γ相比例接近于1∶1;相较于热轧态双相钢,不同温度固溶处理后,双相钢的抗拉强度、规定塑性延伸强度和洛氏硬度有不同程度减小,而断后伸长率、断面收缩率和冲击吸收能量有不同程度增加;在固溶温度为1175℃时,双相钢的抗拉强度和规定塑性延伸强度较高,而断后伸长率、断面收缩率和冲击吸收能量都达到最大值。当固溶温度为1175℃时,双相钢的腐蚀电位最大、腐蚀电流密度最小,容抗弧半径和钝化膜电阻最大,弥散系数最接近于1,具有最佳的耐蚀性能。
The effect of solution treatment temperature on the microstructure, mechanical properties and corrosion resistance of 00Cr25Ni7Mo4N duplex stainless steel studied by means of optical microscope,scanning electron microscope,tensile testing machine and electrochemical workstation. The results show that the microstructure of the steel is ferrite( α) + austenite( γ) when the hot-rolling and solution treatment temperatures are 1025-1200 ℃. With the increase of solution treatment temperature,the content of α phase in the steel increases and the content of γ phase decreases; at the solution treatment temperature of 1175 ℃,the ratio of α∶γ in the steel is close to 1∶1.Compared with the hot-rolled steel,after solution treatment at different temperatures,the tensile strength,yield strength and Rockwell hardness of the steel decrease in varying degrees,while the elongation after fracture,reduction of area and impact absorbed energy increase in varying degrees. When solution treated at 1175 ℃,the tensile strength and yield strength of the steel are higher,while the elongation after fracture,reduction of area and impact absorbed energy all reach their maximum values. Also when solution treated at 1175 ℃,the corrosion potential of the steel is the most positive,the corrosion current density is the smallest,the capacitive arc radius and passive film resistance are the largest,and the dispersion coefficient is the closest to 1,so the steel has the best corrosion resistance.
The effect of solution treatment temperature on the microstructure, mechanical properties and corrosion resistance of 00Cr25Ni7Mo4N duplex stainless steel studied by means of optical microscope,scanning electron microscope,tensile testing machine and electrochemical workstation. The results show that the microstructure of the steel is ferrite( α) + austenite( γ) when the hot-rolling and solution treatment temperatures are 1025-1200 ℃. With the increase of solution treatment temperature,the content of α phase in the steel increases and the content of γ phase decreases; at the solution treatment temperature of 1175 ℃,the ratio of α∶γ in the steel is close to 1∶1.Compared with the hot-rolled steel,after solution treatment at different temperatures,the tensile strength,yield strength and Rockwell hardness of the steel decrease in varying degrees,while the elongation after fracture,reduction of area and impact absorbed energy increase in varying degrees. When solution treated at 1175 ℃,the tensile strength and yield strength of the steel are higher,while the elongation after fracture,reduction of area and impact absorbed energy all reach their maximum values. Also when solution treated at 1175 ℃,the corrosion potential of the steel is the most positive,the corrosion current density is the smallest,the capacitive arc radius and passive film resistance are the largest,and the dispersion coefficient is the closest to 1,so the steel has the best corrosion resistance.
引文
[1]陈华辉,梁锐.控轧控冷对高强建筑用钢组织与性能的影响[J].金属热处理,2019,44(1):138-142.Chen Huahui,Liang Rui. Effect of controlled rolling and cooling on the structure and properties of high strength building steel[J]. Heat Treatment of Metals,2019,44(1):138-142.
[2]林双平,苗明明,张岩,等.建筑用高强抗震钢筋[J].金属热处理,2012,37(7):102-105.Lin Shuangping,Miao Mingming,Zhang Yan,et al. High-strength aseismic reinforcement steel bar for building[J]. Heat Treatment of Metals,2012,37(7):102-105.
[3]王哨兵,钟尧舜,付少朋. S32205双相不锈钢线材的开发[J].金属世界,2018(6):74-77.Wang Shaobing, Zhong Yaoshun, Fu Shaopeng. S32205 duplex stainless steel wire development[J]. Metal World,2018(6):74-77.
[4]郑建超,潘超,张建涛,等. Mn对2205双相不锈钢耐点蚀性能的影响[J].工程科学学报,2019(2):246-253.Zheng Jianchao,Pan Chao,Zhang Jiantao,et al. Effect of Mn on pitting corrosion resistance of 2205 duplex stainless steel[J]. Journal of Engineering Science,2019(2):246-253.
[5]万章,孔韦海,张强. S22053不锈钢在6%Fe Cl3溶液中的点蚀行为[J].腐蚀与防护,2019,40(1):18-22.Wan Zhang,Kong Weihai,Zhang Qiang. Pitting corrosion behavior of S22053 stainless steel in 6%Fe Cl3solution[J]. Corrosion and Protection,2019,40(1):18-22.
[6]王红,梁盈,陈炜.时效温度对SAF2507双相不锈钢性能及组织的影响[J].热处理技术与装备,2017,38(6):32-34.Wang Hong,Liang Ying,Chen Wei. Effect of aging temperature on properties and structure of SAF2507 duplex stainless steel[J]. Heat Treatment Technology and Equipment,2017,38(6):32-34.
[7]侯冠宇,郭一二,项洪涛,等.时效处理对S32750超级双相不锈钢在低温海水中腐蚀行为的影响[J].材料保护,2018,51(11):46-50.Hou Guanyu,Guo Yier,Xiang Hongtao,et al. Effect of aging treatment on corrosion behavior of S32750 super duplex stainless steel in low temperature seawater[J]. Material Protection,2018,51(11):46-50.
[8]许镇,徐前,方燕,等.固溶温度对2507双相不锈钢时效后组织及性能的影响[J].热加工工艺,2019,48(2):231-233.Xu Zhen,Xu Qian,Fang Yan,et al. Effect of solution temperature on structure and properties of 2507 duplex stainless steel after aging[J].Hot Working Technology,2019,48(2):231-233.
[9]马明,丁桦,唐正友,等.双相不锈钢2205热轧板微观组织及塑性变形的均匀性[J].材料与冶金学报,2018,17(4):254-262.Ma Ming,Ding Hua,Tang Zhengyou,et al. Uniformity of microstructure and plastic deformation of duplex stainless steel 2205 hot rolled plate[J].Journal of Materials and Metallurgy,2018,17(4):254-262.
[10]刘爽,宋志刚,王曼,等.固溶处理温度对超级双相不锈钢UNS S32750的耐点蚀性能与显微组织的影响[J].金属热处理,2018,43(12):126-130.Liu Shuang,Song Zhigang,Wang Man,et al. Effect of solution treatment temperature on pitting corrosion resistance and microstructure of superduplex stainless steel UNS S32750[J]. Heat Treatment of Metals,2018,43(12):126-130.
[11]王钦娟,刘东.铸造SAF2906超级双相不锈钢耐晶间腐蚀性能评价[J].金属热处理,2018,43(12):52-58.Wang Qinjuan, Liu Dong. Evaluation of intergranular corrosion resistance of cast SAF2906 super duplex stainless steel[J]. Heat Treatment of Metals,2018,43(12):52-58.
[12]Liang C H,Wang H,Huang N B. Effects of sulphate-reducing bacteria on corrosion behaviour of 2205 duplex stainless steel[J]. Journal of Iron and Steel Research,International,2014,21(4):444-450.
[13]卜铁伟.淬火温度对马氏体-铁素体双相不锈钢耐蚀性的影响[J].热加工工艺,2018,47(22):214-216.Bu Tiewei. Effect of quenching temperature on corrosion resistance of martensite-ferrite duplex stainless steel[J]. Hot Working Technology,2018,47(22):214-216.
[14]Dec W,Mosiak M,Socha R P,et al. The effect of sulphate-reducing bacteria biofilm on passivity and development of pitting on 2205 duplex stainless steel[J]. Electrochimica Acta,2016,212:225-236.
[15]Sabouri M,Hoseiny H. Passive layer stability of 2205 duplex stainless steel in oilfield-produced water:Potentiostatic critical pitting temperature test and wavelet analysis[J]. Metallurgical and Materials Transactions B,2017,48(4):2104-2113.
[16]Zhang Z,Han D,Jiang Y,et al. Microstructural evolution and pitting resistance of annealed lean duplex stainless steel UNS S32304[J].Nuclear Engineering and Design,2012,243:56-62.
[2]林双平,苗明明,张岩,等.建筑用高强抗震钢筋[J].金属热处理,2012,37(7):102-105.Lin Shuangping,Miao Mingming,Zhang Yan,et al. High-strength aseismic reinforcement steel bar for building[J]. Heat Treatment of Metals,2012,37(7):102-105.
[3]王哨兵,钟尧舜,付少朋. S32205双相不锈钢线材的开发[J].金属世界,2018(6):74-77.Wang Shaobing, Zhong Yaoshun, Fu Shaopeng. S32205 duplex stainless steel wire development[J]. Metal World,2018(6):74-77.
[4]郑建超,潘超,张建涛,等. Mn对2205双相不锈钢耐点蚀性能的影响[J].工程科学学报,2019(2):246-253.Zheng Jianchao,Pan Chao,Zhang Jiantao,et al. Effect of Mn on pitting corrosion resistance of 2205 duplex stainless steel[J]. Journal of Engineering Science,2019(2):246-253.
[5]万章,孔韦海,张强. S22053不锈钢在6%Fe Cl3溶液中的点蚀行为[J].腐蚀与防护,2019,40(1):18-22.Wan Zhang,Kong Weihai,Zhang Qiang. Pitting corrosion behavior of S22053 stainless steel in 6%Fe Cl3solution[J]. Corrosion and Protection,2019,40(1):18-22.
[6]王红,梁盈,陈炜.时效温度对SAF2507双相不锈钢性能及组织的影响[J].热处理技术与装备,2017,38(6):32-34.Wang Hong,Liang Ying,Chen Wei. Effect of aging temperature on properties and structure of SAF2507 duplex stainless steel[J]. Heat Treatment Technology and Equipment,2017,38(6):32-34.
[7]侯冠宇,郭一二,项洪涛,等.时效处理对S32750超级双相不锈钢在低温海水中腐蚀行为的影响[J].材料保护,2018,51(11):46-50.Hou Guanyu,Guo Yier,Xiang Hongtao,et al. Effect of aging treatment on corrosion behavior of S32750 super duplex stainless steel in low temperature seawater[J]. Material Protection,2018,51(11):46-50.
[8]许镇,徐前,方燕,等.固溶温度对2507双相不锈钢时效后组织及性能的影响[J].热加工工艺,2019,48(2):231-233.Xu Zhen,Xu Qian,Fang Yan,et al. Effect of solution temperature on structure and properties of 2507 duplex stainless steel after aging[J].Hot Working Technology,2019,48(2):231-233.
[9]马明,丁桦,唐正友,等.双相不锈钢2205热轧板微观组织及塑性变形的均匀性[J].材料与冶金学报,2018,17(4):254-262.Ma Ming,Ding Hua,Tang Zhengyou,et al. Uniformity of microstructure and plastic deformation of duplex stainless steel 2205 hot rolled plate[J].Journal of Materials and Metallurgy,2018,17(4):254-262.
[10]刘爽,宋志刚,王曼,等.固溶处理温度对超级双相不锈钢UNS S32750的耐点蚀性能与显微组织的影响[J].金属热处理,2018,43(12):126-130.Liu Shuang,Song Zhigang,Wang Man,et al. Effect of solution treatment temperature on pitting corrosion resistance and microstructure of superduplex stainless steel UNS S32750[J]. Heat Treatment of Metals,2018,43(12):126-130.
[11]王钦娟,刘东.铸造SAF2906超级双相不锈钢耐晶间腐蚀性能评价[J].金属热处理,2018,43(12):52-58.Wang Qinjuan, Liu Dong. Evaluation of intergranular corrosion resistance of cast SAF2906 super duplex stainless steel[J]. Heat Treatment of Metals,2018,43(12):52-58.
[12]Liang C H,Wang H,Huang N B. Effects of sulphate-reducing bacteria on corrosion behaviour of 2205 duplex stainless steel[J]. Journal of Iron and Steel Research,International,2014,21(4):444-450.
[13]卜铁伟.淬火温度对马氏体-铁素体双相不锈钢耐蚀性的影响[J].热加工工艺,2018,47(22):214-216.Bu Tiewei. Effect of quenching temperature on corrosion resistance of martensite-ferrite duplex stainless steel[J]. Hot Working Technology,2018,47(22):214-216.
[14]Dec W,Mosiak M,Socha R P,et al. The effect of sulphate-reducing bacteria biofilm on passivity and development of pitting on 2205 duplex stainless steel[J]. Electrochimica Acta,2016,212:225-236.
[15]Sabouri M,Hoseiny H. Passive layer stability of 2205 duplex stainless steel in oilfield-produced water:Potentiostatic critical pitting temperature test and wavelet analysis[J]. Metallurgical and Materials Transactions B,2017,48(4):2104-2113.
[16]Zhang Z,Han D,Jiang Y,et al. Microstructural evolution and pitting resistance of annealed lean duplex stainless steel UNS S32304[J].Nuclear Engineering and Design,2012,243:56-62.