Haynes 230镍基合金无缝管的组织及性能
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摘要
采用VIM+ESR+热挤压工艺制造出Haynes 230镍基合金荒管,经过两道次冷轧+固溶热处理开发出规格为Ф89 mm×12 mm的无缝管,并对其组织及性能进行了分析。结果表明:Haynes 230合金无缝管中存在较多沿纵向弥散均匀分布的细小白色析出相,主要为富W的碳化物,呈近似圆形或椭圆形均匀分布,少量呈带尖角的圆形,最大尺寸可达10μm,面积含量约为2%,此外还有少量灰色相,为富Cr的碳化物。无缝管基体为奥氏体等轴晶,且存在较多孪晶,纵向平均晶粒尺寸约为33. 35μm,晶粒度6. 5级;无缝管具有良好的拉伸性能、冲击韧性和耐晶间腐蚀性能。开发出的Haynes 230合金无缝管的化学成分、显微组织、力学性能及耐腐蚀性能满足其使用要求。
A Haynes 230 nickel-base alloy hollow billet was manufactured by VIM + ESR + hot extrusion process,and a Ф89 mm × 12 mm seamless tube was manufactured by two-pass cold rolling + solution heat treatment,and its microstructure and properties were analyzed. The experimental results show that there are many fine white precipitate phases distributed uniformly along the longitudinal direction in the seamless tube of Haynes 230 alloy. These white precipitate phases are the W-rich carbides distributed in a nearly circular or elliptical shape,a slight amount of them with sharp corners,their largest size is up to 10 μm,and their area content is about 2%. In addition,there is also a small amount of gray precipitate of Cr-rich carbide. The matrix of the seamless tube is austenitic equiaxed grains with many twins. The average grain size in the longitudinal direction is about 33. 35 μm or No. 6. 5 grade. The seamless tube has good tensile properties,impact toughness and intergranular corrosion resistance. The chemical composition, microstructure, mechanical properties and intergranular corrosion resistance of the developed Haynes 230 alloy seamless tube meet the use requirements.
A Haynes 230 nickel-base alloy hollow billet was manufactured by VIM + ESR + hot extrusion process,and a Ф89 mm × 12 mm seamless tube was manufactured by two-pass cold rolling + solution heat treatment,and its microstructure and properties were analyzed. The experimental results show that there are many fine white precipitate phases distributed uniformly along the longitudinal direction in the seamless tube of Haynes 230 alloy. These white precipitate phases are the W-rich carbides distributed in a nearly circular or elliptical shape,a slight amount of them with sharp corners,their largest size is up to 10 μm,and their area content is about 2%. In addition,there is also a small amount of gray precipitate of Cr-rich carbide. The matrix of the seamless tube is austenitic equiaxed grains with many twins. The average grain size in the longitudinal direction is about 33. 35 μm or No. 6. 5 grade. The seamless tube has good tensile properties,impact toughness and intergranular corrosion resistance. The chemical composition, microstructure, mechanical properties and intergranular corrosion resistance of the developed Haynes 230 alloy seamless tube meet the use requirements.
引文
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[18]陈石富,马惠萍,鞠泉,等.稀土元素La对GH230合金1000℃抗氧化性能的影响[J].钢铁研究学报,2009,21(11):45-50.Chen Shifu,Ma Huiping,Ju Quan,et al. Effect of rare earth element lanthanum on oxidation behavior of GH230 at 1000℃in air[J].Journal of Iron and Steel Research,2009,21(11):45-50.
[19]高佩,朱海涛,程晓农,等. 700℃超超临界锅炉用Inconel740H合金的热塑性[J].金属热处理,2017,42(9):124-127.Gao Pei,Zhu Haitao,Cheng Xiaonong,et al. Hot ductility of Inconel740H alloy for 700℃ultra supercritical boilers[J]. Heat Treatment of Metals,2017,42(9):124-127.
[20]陈正宗,刘正东,包汉生.铸态耐热合金CN617热变形行为研究[J].金属热处理,2014,39(11):68-72.Chen Zhengzong,Liu Zhengdong,Bao Hansheng. Hot deformation behavior and processing maps of CN617 nickel-based heat-resistant alloy ingot[J]. Heat Treatment of Metals,2014,39(11):68-72.
[2]Katcher M,Klarstrom D L. A Review of Haynes230and 617alloys for high temperature gas cooled reactors[C]//Materials Science Forum. 2008:511-517.
[3]Lu Y L,Chen L J,Liaw P K,et al. Effects of temperature and hold time on creep-fatigue crack-growth behavior of HAYNES230alloy[J]. Materials Science&Engineering A,2006,429(1):1-10.
[4]胡皓,舒涛. 700℃超超临界机组高温材料试验平台综述[J].中国电业(技术版),2014(10):18-21.
[5]赵远,岳庚新. 700℃超超临界火力发电机组高温压力管道用材研究进展[J].焊管,2016,39(9):26-29.Zhao Yuan, Yue Gengxin. Research progress of high temperature pressure material used for 700℃ultra-supercritical coal-fired power unit[J]. Weld Pipe and Tube,2016,39(9):26-29.
[6]Hashimoto T,Tanaka Y,Hokano M,et al. Latest technology of highly efficient coal-fired thermal power plants and future prospects[C]//International Conference on Network-Based Information Systems. IEEE Computer Society,2011:394-399.
[7]Pataky G J, Sehitoglu H, Maier H J. Creep deformation and mechanisms in Haynes 230 at 800℃and 900℃[J]. Journal of Nuclear Materials,2013,443(1/3):484-490.
[8]Mo Kun,Lv Wei,Tung Hsiao-Ming,et al. Biaxial thermal creep of alloy 617 and alloy 230 for VHTR applications[J]. Journal of Engineering Materials and Technology-Transactions of the ASME,2016,138(3):031015-1-031015-8.
[9]Kim D,Sah I,Jang C. Effects of aging in high temperature helium environments on room temperature tensile properties of nickel-base superalloys[J]. Materials Science&Engineering A,2011,528(3):1713-1720.
[10]Kim D,Sah I,Kim D,et al. High temperature oxidation behavior of alloy 617 and Haynes 230 in impurity-controlled helium environments[J]. Oxidation of Metals,2011,75(1/2):103-119.
[11]Kim D,Sah I,Lee H J,et al. Hydrogen effects on oxidation behaviors of Haynes 230 in high temperature steam environments[J]. Solid State Ionics,2013,243(4):1-7.
[12]Kim D,Kim D,Lee H J,et al. Corrosion characteristics of Ni-base superalloys in high temperature steam with and without hydrogen[J].Journal of Nuclear Materials,2013,441(1/3):612-622.
[13]Mahaffey J,Adam D,Brittan A,et al. Corrosion of alloy Haynes 230in high temperature supercritical carbon dioxide with oxygen impurity additions[J]. Oxidation of Metals,2016,86(5/6):567-580.
[14]刘毅,胡锐,胡敏,等. Haynes230合金铸锭的均匀化工艺研究[J].稀有金属材料与工程,2008,37(7):1285-1290.Liu Yi,Hu Rui,Hu Min,et al. Microsegregation and homogenization treatment of Haynes 230 ingot[J]. Rare Metal Materials and Engineering,2008,37(7):1285-1290.
[15]胡敏,李金山,胡锐,等. Haynes230合金凝固过程中的相变及元素偏析[J].稀有金属材料与工程,2008,37(5):848-850.Hu Min,Li Jinshan,Hu Rui,et al. Phase transformation and element segregation during solidification for as-cast Haynes 230 superalloy[J].Rare Metal Materials and Engineering,2008,37(5):848-850.
[16]彭聪辉,常辉,胡锐,等. Haynes230高温合金的静态再结晶动力学[J].航空材料学报,2011,31(2):8-12.Peng Conghui,Chang Hui,Hu Rui,et al. Static recrystallization kinetics of Haynes 230 superalloy[J]. Journal of Aeronautical Materials,2011,31(2):8-12.
[17]苏晓帆,李金山,胡锐,等.固溶处理对热变形Haynes230奥氏体晶粒长大的影响[J].铸造技术,2011,32(2):193-195.Su Xiaofan, Li Jinshan, Hu Rui, et al. Effect of solution heat treatment on the austenitic grain growth of hot deformed Haynes 230alloy[J]. Foundry Technology,2011,32(2):193-195.
[18]陈石富,马惠萍,鞠泉,等.稀土元素La对GH230合金1000℃抗氧化性能的影响[J].钢铁研究学报,2009,21(11):45-50.Chen Shifu,Ma Huiping,Ju Quan,et al. Effect of rare earth element lanthanum on oxidation behavior of GH230 at 1000℃in air[J].Journal of Iron and Steel Research,2009,21(11):45-50.
[19]高佩,朱海涛,程晓农,等. 700℃超超临界锅炉用Inconel740H合金的热塑性[J].金属热处理,2017,42(9):124-127.Gao Pei,Zhu Haitao,Cheng Xiaonong,et al. Hot ductility of Inconel740H alloy for 700℃ultra supercritical boilers[J]. Heat Treatment of Metals,2017,42(9):124-127.
[20]陈正宗,刘正东,包汉生.铸态耐热合金CN617热变形行为研究[J].金属热处理,2014,39(11):68-72.Chen Zhengzong,Liu Zhengdong,Bao Hansheng. Hot deformation behavior and processing maps of CN617 nickel-based heat-resistant alloy ingot[J]. Heat Treatment of Metals,2014,39(11):68-72.