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Rolling Technology Research Of ER50-6Wire Rod For CO2Gas Shielded Welding

Posted on:2014-05-18Degree:MasterType:Thesis
Country:ChinaCandidate:G Y HuFull Text:PDF
GTID:2181330422455430Subject:Materials engineering
Abstract/Summary:PDF Full Text Request
The main contents of this paper are trial produce of CO2gas shielded arc welding ER50-6alloy wire rod according the characteristics of Xing-Yu steel company high speed wire production line and production experience of other welding wire steel production, and at the same time, the production process was tested and researched. Through small batch production, performance testing and the quality problems happen in the course of production processing had been analyzed, researched and solved, the ER50-6alloy wire rod had been developed successfully at last. The key research results are as followed:(1) It is successful that welding wire steel is produced in high speed wire rod production line. The process parameters are feasible and reasonable.(2) In the production of the ER50-6welding wire, it was taken that1050±20℃opening rolling temperature,900±20℃finishing rolling temperature,860±20℃laying temperature, and stelmor delayed cooling control, the roller speed0.4m/s. the ER50-6welding wire have stable performance and good plasticity.(3) The micro-defects forming in the process of drawing for martensite of welding wire, leaded wire brittle fracture. Controlling laying temperature and rod cooling speed on STELMOR cooling line and avoiding the formation of bainite and martensite is the key measures to ensure drawing property of ER50-6wire rod.(4)It is an effective way to reduce the tensile strength that making the content of C Si、Mn is the lower bound of the composition.(5) For improving drawing property of ER50-6wire rod, performance of the whole was better, and the uniform chemical composition and the stable laying temperature was the most important. Through taking corresponding measures, performance of the whole was improved obviously.(6) ER50-6wire rods produced by Xin-steel company have accurate dimensions, stable chemical composition, stable performance, low strength, high plasticity, good drawing properties and good welding performance. It has achieved the technical supply conditions and user requirements. The ER50-6had been developed successfully that gives the valuable experience for the future development of high grade welding wire rods.
Keywords/Search Tags:CO2gas shielded welding, ER50-6wire rods, Controlled rolling andcontrolled cooling
PDF Full Text Request
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