13th International Conference on Fracture June 16–21, 2013, Beijing, China -1- Failure Analysis Procedure of Steel Wire Drawing Fracture LIU Lihua, SUN Jie*, WANG Huan Jiangsu Fasten Hopesun Group Co., Ltd., 214434, China * Corresponding author: jason8246@163.com Abstract Failure analysis procedure of steel wire drawing fracture process was introduced, which includes background information collection, visual inspection and low magnification test, microscopic analysis, metallographic examination, etc. The importance of each step on fracture failure analysis results was also explained. In accordance with the stress condition in drawing process of steel wire, the typical characteristics of the mainly drawing fracture failure modes including pencil-point shaped, plane shaped and inclined shaped were investigated. The process of microscopic analysis and metallographic examination were optimized with macro morphology characteristics, and a faster and more precise analytical approach of metallic wire drawing fracture failure was proposed which was of important engineering significance and practical value to improve product competitiveness. Keywords failure analysis, fracture, drawing, SEM, metallographic examination 1. Introduction This is a template to prepare the full paper manuscript for the 13th International Conference on Fracture, which will be held at Beijing, China, June 16–21, 2013. Fracture failure was inevitable during steel wire drawing which was affected by equipment, weather, operation, etc [1]. Many researchers had made great efforts to investigate the causes of fracture failure, the major fracture morphology included pencil-point shaped, plane shaped, and inclined shaped fracture [2]. And microstructure of wire rod, drawing die, lubrication and other factors which lead to fracture were analyzed. An optimized procedure of circle section steel wire fracture failure analysis which was depended on macroscopic fracture morphology was proposed. The importance of every step of failure analysis was emphasized, and failure analysis of the pencil-point shaped, plane shaped, and inclined shaped fracture were introduced respectively. 2. Failure Analysis Procedure The main procedure failure analysis procedure of steel wire drawing fracture was: background information, visual inspection and low magnification test, microscopic analysis, metallographic examination, chemical analysis and mechanical tests if necessary [3]. 2.1. Background Information The object of failure analysis was not only the fracture wire but an integration of wire, equipment, environment and person. Failure analysis should consider the relationships include: fracture wire and normal wire of the same batch, fracture wire and drawing equipment, fracture wire and production environment, fracture and operating person. First of all, make sure the location of fracture wire, number of drawing pass, reduction of fracture pass and other relevant information as much as possible. Generally, fracture wire located in drawing die hole, around the reel, post-straightener, or take-up device. That information was used to judge the stress condition of fracture. Secondly, find out the fracture frequency of the same batch and
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