加热温度对S30432奥氏体不锈钢管内壁喷丸层的影响
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摘要
借助扫描电镜及能谱仪等,研究不同热处理温度(740、760、780、800、820、850和1000℃)对S30432不锈钢管内壁喷丸层的影响。结果表明:喷丸层硬度随着热处理温度的提高而逐渐降低。当热处理温度达到810℃时,喷丸层硬度与基体硬度平均差值为100 HV0.5;温度至1000℃时,喷丸层消失。在740~770℃温度范围,喷丸层仍保持良好的向外表面输送Cr元素的能力;在800~850℃温度范围,喷丸层的形变组织不同程度退化,向外表面输送Cr元素的能力降低。为了保证喷丸层组织和抗氧化性能不被破坏,确保喷丸处理的质量,首先应避免对内喷丸钢管进行1000℃以上的固溶处理,其次应保证内喷丸钢管焊后热处理温度不超过780℃。
The effect of heat treatment temperature( 740,760,780,800,820,850 and 1000 ℃) on shot blasting layer of S30432 stainless steel was investigated by means of scanning electron microscope( SEM) and energy dispersive spectrometer( EDS). The results show that the hardness of shot-blasted layer decreases with the increase of temperature. The average hardness difference between the base and the shotpeening layer is 100 HV0. 5 when the heat treatment temperature is 810 ℃,while the shot-peening layer disappears completely at 1000 ℃.The shot-peening layer still keeps good transporting capacity of Cr element to the external surface between 740 ℃ and 770 ℃,while the deformed microstructure and the Cr transporting capacity of shot-blasted layer is degraded in the range of 800-850 ℃. In order to guarantee the microstructure and oxidation resistance of shot peening layer,so that to ensure the shot-blasted quality,the solution treatment above 1000 ℃should be avoided and the post welding heat treatment temperature for the inside shot blasting steel tube should be lower than 780 ℃.
The effect of heat treatment temperature( 740,760,780,800,820,850 and 1000 ℃) on shot blasting layer of S30432 stainless steel was investigated by means of scanning electron microscope( SEM) and energy dispersive spectrometer( EDS). The results show that the hardness of shot-blasted layer decreases with the increase of temperature. The average hardness difference between the base and the shotpeening layer is 100 HV0. 5 when the heat treatment temperature is 810 ℃,while the shot-peening layer disappears completely at 1000 ℃.The shot-peening layer still keeps good transporting capacity of Cr element to the external surface between 740 ℃ and 770 ℃,while the deformed microstructure and the Cr transporting capacity of shot-blasted layer is degraded in the range of 800-850 ℃. In order to guarantee the microstructure and oxidation resistance of shot peening layer,so that to ensure the shot-blasted quality,the solution treatment above 1000 ℃should be avoided and the post welding heat treatment temperature for the inside shot blasting steel tube should be lower than 780 ℃.
引文
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[14]李辛庚,傅敏,何家文.喷丸对TP304H钢高温水蒸气氧化行为的作用[J].材料科学与工艺,2004(3):253-257.Li Xingeng,Fu Min,He Jiawen.Deformation of surface layer by shot blasting on oxidation resistance of TP304H steel at elevated temperature in water vapor[J].Materials Science and Technology,2004(3):
[2]Kikuchi S,Yasutake Y,Komotori J.Effect of fine particle peening on oxidation resistance of austenitic stainless steel[J].Journal of Solid Mechanics and Materials Engineering,2012,6(6):431-439.
[3]李新梅,张忠文,邹勇,等.Super304H钢600℃时效后的组织变化[J].金属热处理,2011,36(8):78-81.Li Xinmei,Zhang Zhongwen,Zou Yong,et al.Microstructure variation in Super304H steel aged at 600℃[J].Heat Treatment of Metals,2011,36(8):78-81.
[4]王伟,黄翔,蔡永江,等.Super304H奥氏体耐热钢服役36891 h后的组织与性能[J].材料热处理学报,2015,36(10):89-94.Wang Wei,Huang Xiang,Cai Yongjiang,et al.Microstructure and properties of Super304H austenitic heat-resistant steel after service for36891 h[J].Transactions of Materials and Heat Treatment,2015,36(10):89-94.
[5]李新梅,张忠文,邹勇,等.T92/Super304H异种钢焊接接头的性能研究[J].材料导报,2011,25(18):99-101.Li Xinmei,Zhang Zhongwen,Zou Yong,et al.Research on properties of the T92/Super 304H dissimilar steel welded joints[J].Materials Review,2011,25(18):99-101.
[6]张祺,王家庆,陈国宏,等.T92/Super304H异种钢焊接接头的组织结构和力学性能[J].中国有色金属学报,2013(2):396-402.Zhang Qi,Wang Jiaqing,Chen Guohong,et al.Microstructures and mechanical properties of T92/Super304H dissimilar steel weld joints[J].The Chinese Journal of Nonferrous Metals,2013(2):396-402.
[7]Sawada K,Kushima H,Kimura K.Z-phase formation during creep and aging in 9-12%Cr heat resistant steels[J].ISIJ International,2006,46(5):769-775.
[8]Kim M Y,Kwak S C,Choi I S,et al.High-temperature tensile and creep deformation of cross-weld specimens of weld joint between T92martensitic and Super304H austenitic steels[J].Materials Characterization,2014,97:161-168.
[9]Cao J,Gong Y,Zhu K,et al.Microstructure and mechanical properties of dissimilar materials joints between T92 martensitic and S304 H austenitic steels[J].Materials and Design,2011,32(5):2763-2770.
[10]Chen G,Zhang Q,Liu J,et al.Microstructures and mechanical properties of T92/Super304H dissimilar steel weld joints after hightemperature ageing[J].Materials and Design,2013,44:469-475.
[11]赵慧传,王彩侠,贾建民,等.变形对奥氏体不锈钢管喷丸效果的影响[J].中国电机工程学报,2012,32(20):126-130.Zhao Huichuan,Wang Caixia,Jia Jianmin,et al.Influences of deformation on shot blasting effect of austenite stainless steel tubes[J].Proceedings of the CSEE,2012,32(20):126-130.
[12]王彩侠,贾建民,赵慧传,等.加热温度对奥氏体不锈钢管内壁喷丸处理效果的影响[J].热力发电,2011(12):87-91.Wang Caixia,Jia Jianmin,Zhao Huichuan,et al.Influences of heating temperature upon shot-blasting treatment on internal surface of austenitic stainless steel tubes[J].Thermal Power Generation,2011(12):87-91.
[13]贾建民,王彩侠,赵慧传,等.国产S30432喷丸管的喷丸形变层组织与硬度对比研究[J].电力建设,2011(4):7-13.Jia Jianmin,Wang Caixia,Zhao Huichuan,et al.The comparison research on microstructure and hardness of the deformed metal layers of China-made shot blasted S30432 tubes[J].Electric Power Construction,2011(4):7-13.
[14]李辛庚,傅敏,何家文.喷丸对TP304H钢高温水蒸气氧化行为的作用[J].材料科学与工艺,2004(3):253-257.Li Xingeng,Fu Min,He Jiawen.Deformation of surface layer by shot blasting on oxidation resistance of TP304H steel at elevated temperature in water vapor[J].Materials Science and Technology,2004(3):