汽轮机IN783合金螺栓的断裂行为
Fracture Behavior of IN783 Alloy Bolts in Steam Turbine
摘 要
应用于超超临界机组汽轮机再热汽门的IN783合金螺栓频繁发生断裂，断裂形式多样。为研究影响其断裂行为的因素，对该螺栓材料进行了不同应力、温度下的持久断裂试验，并对断裂试样进行了金相检验及断口分析。结果表明：IN783合金螺栓在650℃和600℃时的时效脆性较大，持久塑性很低，试样断裂以沿晶脆性断裂为主，随着断裂时间的延长，裂纹源处氧化特征及断口腐蚀特征越来越明显，断裂形式逐渐转变为沿晶氧化断裂。
断裂
时效脆性
裂纹源
沿晶氧化
In783 alloy bolt
fracture
aging brittleness
crack source
intergranular oxidation
Abstract
In783 alloy bolts used in reheat valve of ultra supercritical steam turbine fractured frequently, and the fracture forms were various. In order to study the influencing factors of the fracture behavior, the rupture fracture test of the bolt material was carried out under different stresses and temperatures, and the fracture samples were examined by metallographic examination and fracture analysis. The results show that the aging brittleness of the bolts was greater at 650℃ and 600℃, and its rupture plasticity was very low. The fracture mode of the samples were mainly intergranular brittle fracture. With the extension of the fracture time, the oxidation characteristics of the crack source and the corrosion characteristics of the fracture surface were more and more obvious, and the fracture mode gradually changed to intergranular oxidation fracture.
中图分类号 TG115.5 DOI 10.11973/lhjy-wl201811001
所属栏目 试验与研究
基金项目
收稿日期 2018/8/1
修改稿日期
网络出版日期
作者单位点击查看
备注孙雄(1983-),男,工程师,主要从事电网、电站设备失效分析及检测方面的研究,18061602018@163.com
引用该论文: SUN Xiong,YANG Chao,YANG Xianbiao. Fracture Behavior of IN783 Alloy Bolts in Steam Turbine[J]. Physical Testing and Chemical Analysis part A:Physical Testing, 2018, 54(11): 785～789
孙雄,杨超,杨贤彪. 汽轮机IN783合金螺栓的断裂行为[J]. 理化检验－物理分册, 2018, 54(11): 785～789
共有人对该论文发表了看法，其中：
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】TUNDERMANN J H. Development of In783 alloy,a low thermal expansion,crack growth resistant superalloy[J]. Acta Metallurgica Sinica (English Letters),1996,12(6):503-507.
【2】YAMAMOTO R,KADOYA Y,KAWAYI H,et al. Alloy design and material properties of Ni-based superalloy with low thermal expansion for steam turbine[J]. Iron & Steel,2004,90(1):37-42.
【3】沈治. INCONEL 783合金的组织与应力弛豫性能研究[D]. 上海:上海交通大学,2010.
【4】彭以超,楼玉民,徐绍平,等. 超超临界机组中压汽门阀盖Alloy783合金螺栓断裂失效分析[J]. 热力发电,2018,47(3):115-122.
【5】姜涛,王建光,张志博,等. 超超临界机组镍基螺栓断裂失效分析[J]. 热力发电,2016,45(1):93-98.
【6】杨超,冯立中,吴红涛,等. 超超临界汽轮机IN783螺栓断裂原因分析[J]. 理化检验(物理分册),2015,51(5):346-349.
【7】束德林. 工程材料力学性能[M]. 北京:机械工业出版社,2003.
【8】韩光炜,冯涤,邓波,等. In783合金的组织和抗氧化性能[J]. 钢铁研究学报,2003,15(7):119-122.
【9】MA L,CHANG K M,MANNAN S K. Oxide-induced crack closure:An explanation for abnormal time-dependent fatigue crack propagation behavior in Inconel alloy 783[J]. Scripta Materialia,2003,48(5):583-588.
【10】李铁藩. 金属晶界在高温氧化中的作用[J]. 中国腐蚀与防护学报,2002,22(3):180-183.
【11】沈治,沈红卫,孙峰,等. IN783合金热处理工艺的热动力学评估及成分设计[J]. 动力工程学报,2010,30(4):287-292.
【12】段辉,甄小辉,吴锐红. 热处理对IN783合金组织和拉伸性能的影响[J]. 热加工工艺,2012,41(2):205-207.
【2】YAMAMOTO R,KADOYA Y,KAWAYI H,et al. Alloy design and material properties of Ni-based superalloy with low thermal expansion for steam turbine[J]. Iron & Steel,2004,90(1):37-42.
【3】沈治. INCONEL 783合金的组织与应力弛豫性能研究[D]. 上海:上海交通大学,2010.
【4】彭以超,楼玉民,徐绍平,等. 超超临界机组中压汽门阀盖Alloy783合金螺栓断裂失效分析[J]. 热力发电,2018,47(3):115-122.
【5】姜涛,王建光,张志博,等. 超超临界机组镍基螺栓断裂失效分析[J]. 热力发电,2016,45(1):93-98.
【6】杨超,冯立中,吴红涛,等. 超超临界汽轮机IN783螺栓断裂原因分析[J]. 理化检验(物理分册),2015,51(5):346-349.
【7】束德林. 工程材料力学性能[M]. 北京:机械工业出版社,2003.
【8】韩光炜,冯涤,邓波,等. In783合金的组织和抗氧化性能[J]. 钢铁研究学报,2003,15(7):119-122.
【9】MA L,CHANG K M,MANNAN S K. Oxide-induced crack closure:An explanation for abnormal time-dependent fatigue crack propagation behavior in Inconel alloy 783[J]. Scripta Materialia,2003,48(5):583-588.
【10】李铁藩. 金属晶界在高温氧化中的作用[J]. 中国腐蚀与防护学报,2002,22(3):180-183.
【11】沈治,沈红卫,孙峰,等. IN783合金热处理工艺的热动力学评估及成分设计[J]. 动力工程学报,2010,30(4):287-292.
【12】段辉,甄小辉,吴锐红. 热处理对IN783合金组织和拉伸性能的影响[J]. 热加工工艺,2012,41(2):205-207.
相关信息
