一种具有极高屈强比的高强钢的室温蠕变特性

doi:10.13251/j.issn.0254-6051.2020.03.006

摘要/Abstract

摘要：

利用MTS万能试验机研究了屈强比为99.7%的高强钢在不同加载应力条件下的室温蠕变行为,并对不同蠕变条件下的组织演变特征进行了分析。结果表明:在低于屈服强度的应力作用下,试验钢表现出明显的室温蠕变,且蠕变曲线呈现出以稳态阶段为主的双阶段室温蠕变特征。从蠕变曲线的拟合结果可知,曲线符合对数规律,并且蠕变速率随着蠕变时间的增加逐渐降低,其可相差两个数量级。在不同的室温蠕变条件下,该高强钢在室温蠕变过程中组织变化不明显,晶粒都以细小晶粒为主,多数为5 μm以下,且晶界都是以15°以下的小角晶界为主,而大角晶界多集中于50°~60°。

关键词: 高强钢, 屈强比, 室温蠕变, 组织, 蠕变速率

Abstract:

The room temperature creep behavior of a high strength steel with yield ratio of 99.7% under different loading stress conditions was studied by using MTS universal testing machine, and the characteristics of microstructure evolution under different creep conditions were analyzed. The results show that under the loading stress lower than the yielding strength, the tested steel shows obvious creep phenomenon at room temperature, and the creep curve shows typical two-stage room temperature creep characteristics based on steady state stage. From the fitting results of the creep curves, it can be found that the curves follow the log law, and the creep rate decreases gradually with the increase of creep time, which may vary by two orders of magnitude. Under different room temperature creep conditions, the change of microstructure of the high strength steel is not obvious in the process of room temperature creep. The grain sizes are very small and most of them are less than 5 μm. Besides, the grain boundary is dominated by the small angular grain boundary below 15°, while the large angle grain boundary is mostly concentrated in the 50°-60° range.

Key words: high strength steel, yield ratio, room temperature creep, microstructure, creep rate

中图分类号:

TG142.1

郭淼, 丁新民, 宁艳亭, 孙未. 一种具有极高屈强比的高强钢的室温蠕变特性[J]. 金属热处理, 2020, 45(3): 25-29.

Guo Miao, Ding Xinming, Ning Yanting, Sun Wei. Room temperature creep characteristics of a high strength steel with extremely high yield ratio[J]. HTM, 2020, 45(3): 25-29.

参考文献

[1]聂德福, 赵杰, 莫涛. X70管线钢的室温蠕变及其对流变应力的影响[J]. 材料工程, 2006(6): 58-61.
Nie Defu, Zhao Jie, Mo Tao. Room temperature creep and its effect on flow stress in X70 pipeline steel[J]. Journal of Materials Engineering, 2006(6): 58-61.
[2]马秋林, 张莉, 徐宏, 等. 工业纯钛TA2室温蠕变第1阶段特性研究[J]. 稀有金属材料与工程, 2007(1): 11-14.
Ma Qiulin, Zhang Li, Xu Hong, et al. Primary creep characteristics of TA2 at room temperature[J]. Rare Metal Materials and Engineering, 2007(1): 11-14.
[3]李芹. LD10铝合金常温态蠕变行为[D]. 大连: 大连理工大学, 2011.
[4]Yamada T, Kawabata K, Sato E, et al. Presences of primary creep in various phase metals and alloys at ambient temperature[J]. Materials Science and Engineering A, 2004, 387-389: 719-722.
[5]陈立杰, 谢里阳, 冮铁强. GH4049镍基高温合金的高温蠕变行为[J]. 中国有色金属学报, 2004, 14(9): 1489-1493.
Chen Lijie, Xie Liyang, Gang Tieqiang. Tensile creep behavior of GH4049 nickle-based superalloy at high temperature[J]. Transactions of Nonferrous Metals Society of China, 2004, 14(9): 1489-1493.
[6]Barkia B, Doquet V, Couzinié J P, et al. Room-temperature creep and stress relaxation in commercial purity titanium-influence of the oxygen and hydrogen contents on incubation phenomena and aging-induced rejuvenation of the creep potential[J]. Materials Science and Engineering A, 2015, 624(21): 79-89.
[7]Jie Z, Tao M, Nie D. The occurrence of room-temperature creep in cracked 304 stainless steel specimens and its effect on crack growth behavior[J]. Materials Science and Engineering A, 2008, 483(1): 572-575.
[8]Gao G Y, Dexter S C. Effect of hydrogen on creep behavior of Ti-6Al-4V alloy at room temperature[J]. Metallurgical Transactions A, 1991, 18(6): 1125-1130.
[9]Oriani R A, Josephic P H. The effects of hydrogen on the room-temperature creep of spheroidized 1040-steel[J]. Acta Metallurgica, 1981, 29(4): 669-674.
[10]Barkia B, Doquet V, Couzinié J P, et al. Room-temperature creep and stress relaxation in titanium: influence of oxygen and hydrogen contents[C]// Proceedings of the 13th World Conference on Titanium. John Wiley and Sons, Ltd, 2016: 701-706.
[11]仲莹莹, 张新明, 邓运来, 等. ZM6合金室温蠕变机理研究[J]. 特种铸造及有色合金, 2009, 29(4): 378-381.
Zhong Yingying, Zhang Xinming, Deng Yunlai, et al. Creep mechanism of Mg-Nd-Zn-Zr (ZM6) alloy of ambient temperature[J]. Special Casting and Nonferrous Alloys, 2009, 29(4): 378-381.
[12]陈吉, 汪伟, 卢磊, 等. 纳米压痕法测量Cu的室温蠕变速率敏感指数[J]. 金属学报, 2001, 37(11): 1179-1183.
Chen Ji, Wang Wei, Lu Lei, et al. Measurement of creep rate sensitivity of copper at room temperature by using nanoindentation[J]. Acta Metallurgica Sinica, 2001, 37(11): 1179-1183.
[13]马秋林, 李占斌, 徐宏, 等. 工业纯钛室温蠕变性能试验[J]. 华东理工大学学报(自然科学版), 2004, 30(6): 702-705.
Ma Qiulin, Li Zhanbin, Xu Hong, et al. Experimental study on the creep performance of titanium at room temperature[J]. Journal of East China University of Science and Technology, 2004, 30(6): 702-705.
[14]岳珠峰, 吕震宙. 双剪切试样在镍基单晶合金蠕变变形损伤和寿命研究中的应用[J]. 金属学报, 2002, 38(8): 809-813.
Yue Zhufeng, Lü Zhenzhou. Application of the double shear specimens in the study of the creep damage and rupture of the nickel-base single crystal superalloys[J]. Acta Metallurgica Sinica, 2002, 38(8): 809-813.
[15]张荣华. 深冷处理对Cu-11.74Al-0.38Ni合金蠕变抗力的影响[J]. 金属热处理, 2014, 39(10): 118-120.
Zhang Ronghua. Effect of cryogenic treatment on creep resistance of Cu-11.74Al-0.38Ni alloy[J]. Heat Treatment of Metals, 2014, 39(10): 118-120.
[16]杨镇, 王志文. 小冲杆蠕变试样中心挠度-蠕变应变关系的有限元分析[J]. 化工机械, 2004, 31(1): 24-27.
Yang Zhen, Wang Zhiwen. Finite element analysis of the relation between the center deflection and the creep strain of a small punch specimen[J]. Chemical Engineering and Machinery, 2004, 31(1): 24-27.
[17]岳珠峰, 胡卫兵, 吕震宙. 双剪切试样用于短纤维金属基复合材料的蠕变响应研究[J]. 金属学报, 2003, 39(1): 104-108.
Yue Zhufeng, Hu Weibin, Lü Zhenzhou. Application of the double shear creep specimens on the fiber-reinforced metal matrix composites[J]. Acta Metallurgica Sinica, 2003, 39(1): 104-108.
[18]陈大明, 康沫狂. 起落架用超高强度钢的屈强比问题[J]. 航空材料学报, 1992, 12(1): 50-56.
Chen Daming, Kang Mokuang. A question about yield to strength ratio of ultra-high strength steel for landing gear[J]. Journal of Aeronautical Materials, 1992, 12(1): 50-56.
[19]李晓红, 樊玉光, 徐学利, 等. X80高屈强比管线钢性能分析与管道安全性预测[J]. 机械科学与技术, 2005, 24(9): 1074-1076.
Li Xiaohong, Fan Yuguang, Xu Xueli, et al. On mechanical characteristics of high yield ratio X80 pipeline steel and the safety forecasting of the pipeline[J]. Mechanical Science and Technology, 2005, 24(9): 1074-1076.
[20]辛希贤, 姚婷珍, 张刊林, 等. 高屈强比管线钢的安全性分析[J]. 焊管, 2006, 29(4): 36-39.
Xin Xixian, Yao Tingzhen, Zhang Kanlin, et al. Analysis on security of pipeline steel with high yield ratio[J]. Welded Pipe and Tube, 2006, 29(4): 36-39.
[21]梁浩宇. 金属材料的高温蠕变特性研究[D]. 太原: 太原理工大学, 2013.
[22]Alden T H. Theory of plastic and viscous deformation[J]. Metallurgical and Materials Transactions A, 1987, 18(6): 811-826.
[23]王廷喜. 弹簧钢的应力松弛行为研究[D]. 成都: 西南交通大学, 2012.
[24]孟龙晖, 杨吟飞, 何宁. 纳米压痕法测量Ti6Al4V钛合金室温蠕变应力指数[J]. 稀有金属材料与工程, 2016, 45(3): 617-622.
Meng Longhui, Yang Yinfei, He Ning. Nanoindentation measurement of creep stress exponent of Ti6Al4V alloy at room temperature[J]. Rare Metal Materials and Engineering, 2016, 45(3): 617-622.
[25]黎永钧, 韩庆辉. 铜及其合金室温蠕变的研究[J]. 西安交通大学学报, 1993(1): 39-44.
Li Yongjun, Han Qinghui. Creep behaviour of copper and its alloy at room temperature[J]. Journal of Xi'an Jiao Tong University, 1993(1): 39-44.
[26]李京波. 输油管道用钢的蠕变和松弛特性研究[D]. 上海: 上海交通大学, 2015.