316L奥氏体不锈钢稳定辊轴头断裂的原因
Reason for Fracture of 316L Austenitic Stainless Steel Shaft Head of Stabilizing Roll
摘 要
某热镀锌生产线上316L奥氏体不锈钢稳定辊轴头在运行时发生断裂，采用化学成分分析、硬度及拉伸性能测试、金相检验等方法对断裂原因进行了分析。结果表明：该轴头组织中存在大量的长条状硫化夹杂物，导致组织不均，材料性能下降，同时轴头的圆周表面加工粗糙，液态锌通过表面缺陷渗入基体内部并腐蚀基体，从而导致轴头在外载荷作用下发生脆性断裂。
稳定辊
轴头
夹杂物
锌腐蚀
316L stainless steel
stabilizing roll
shaft head
inclusion
zinc corrosion
Abstract
316L austenitic stainless steel shaft head of stabilizing roll in a hot galvanizing line fractured during working. The fracture cause was analyzed by methods such as chemical composition analysis, hardness and tensile property testing, and metallographic inspection. The results show that a large number of long-strip sulphur inclusions existed in the structure of the shaft head, leading to inhomogeneity of structure and reduction of the material properties. Meanwhile the circumference surface of the shaft head was pretty rough. Liquid zinc infiltrated inside the substrate through surface defects and corroded the substrate. Finally, the shaft head fractured in brittle mode under external loads.
中图分类号 TG115.2 DOI 10.11973/jxgccl201903016
所属栏目 失效分析
基金项目
收稿日期 2018/1/24
修改稿日期 2019/1/15
网络出版日期
作者单位点击查看
备注史浩(1994-),男,湖北襄阳人,硕士研究生
引用该论文: SHI Hao,WANG Weize. Reason for Fracture of 316L Austenitic Stainless Steel Shaft Head of Stabilizing Roll[J]. Materials for mechancial engineering, 2019, 43(3): 82～86
史浩,王卫泽. 316L奥氏体不锈钢稳定辊轴头断裂的原因[J]. 机械工程材料, 2019, 43(3): 82～86
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参考文献
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【2】王淑梅,戴红旗,刘阳,等. 钝化预处理对316L不锈钢在漂液中电化学腐蚀性能的影响[J]. 南京林业大学学报(自然科学版), 2011, 35(6):91-95.
【3】范强强. 316L奥氏体不锈钢的腐蚀行为[J]. 全面腐蚀控制, 2013, 27(11):39-42.
【4】JIN Z H, GE H H, LIN W W, et al. Corrosion behaviour of 316L stainless steel and anti-corrosion materials in a high acidified chloride solution[J]. Applied Surface Science, 2014, 322:47-56.
【5】贺强. 热镀锌机组沉没辊轴头断裂分析[J]. 理化检验-物理分册, 2005, 41(增刊1):230-233.
【6】边春华,徐科,胡明磊,等. 核电厂蓄电池室排风电机轴断裂失效分析[J]. 全面腐蚀控制, 2015, 29(11):40-42.
【7】MISHRA R, DUTTA M. Effect of steel composition on iron dissolution in molten zinc and development of Fe-Zn phases on steel surface[J]. ISIJ International, 2007, 47(10):1504-1509.
【8】PENG B C, WANG J H, SU X P, et al. Effects of zinc bath temperature on the coatings of hot-dip galvanizing[J]. Surface and Coatings Technology, 2008, 202(9):1785-1788.
【9】王文俊,王艳丽,林均品,等. 锌锅部件锌液腐蚀的研究现状[J]. 钢铁研究学报, 2007, 19(3):1-5.
【10】田国臣,栾加天,臧国彬,等. 凸轮挠曲阀拉杆断裂失效原因分析[J]. 炼油与化工, 2014(3):32-33.
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