A flash welding method for hrb600 high-strength hot-rolled steel bar

A welding method and steel bar technology, applied in welding equipment, resistance welding equipment, metal processing equipment, etc., can solve the problems of long welding process, high alloy addition, low strength level, etc., and achieve high strength, high toughness and reliability of welded joints. Safety, saving welding time, and strong applicability
CN111992862BActive Publication Date: 2022-02-18INST OF RES OF IRON & STEEL JIANGSU PROVINCE +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF RES OF IRON & STEEL JIANGSU PROVINCE
Publication Date
2022-02-18

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Abstract

The invention discloses a flash welding method of HRB600 high-strength hot-rolled steel bar, which comprises the following steps: (1) pretreatment of the welding end face of the steel bar to be welded; (2) clamping and fixing the steel bar to be welded and adjusting the welding gap distance and upsetting length; 3) Set the flash welding process parameters that match the specifications of the steel bars to be welded; (4) Start the welding machine, and the steel bars to be welded are sequentially subjected to welding zone induction heating, flash discharge, pressure upsetting, and pressure maintenance to complete the welding; (5) ) air-cooled to room temperature after welding. The invention can realize flash welding of high-carbon equivalent HRB600 high-strength hot-rolled steel bars, and the welding joint is acicular ferrite + polygonal ferrite + pearlite with good strength and toughness, meeting the fast, simple and reliable welding requirements of the construction industry.
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Description

technical field

[0001] The invention belongs to the field of welding technology, and in particular relates to a flash welding method for HRB600 high-strength hot-rolled steel bars. Background technique

[0002] The rapid development of China's economic construction in recent years has made the construction industry put forward higher requirements for hot-rolled steel bars. Using higher-strength HRB600 high-strength steel bars to replace HRB400 steel bars as building steel bars can save steel usage and reduce structural weight, improve building safety, save energy, reduce emissions, and be environmentally friendly. At present, the carbon equivalent Ceq of HRB600 high-strength steel bars is estimated to be ≥0.50, which belongs to the difficult-to-weld steel bar; at the same time, due to the good strength and plasticity of the base metal, the welded joint needs higher strength and toughness. For this kind of high-strength and difficult-to-weld steel bars, the construction site...

Claims

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