电焊机2025，Vol.55Issue(11)：64-71,81,9.DOI:10.7512/j.issn.1001-2303.2025.11.09
工艺参数对22MnB5钢MAG焊接头成形及性能影响研究
Effect of Process Parameters on Weld Formation and Mechanical Properties of MAG Welded Joints for 22MnB5 Steel
摘要
Abstract
This study employs metal active gas(MAG)welding to join 3 mm thick 22MnB5 steel plates,systematically in-vestigating the effects of welding current,welding voltage,and welding speed on weld formation and mechanical properties.The results demonstrate that when the welding current increases from 120 A to 160 A,the weld seam shape transitions from a V-shape to an X-shape,while the heat affected zone(HAZ)width gradually expands.An increase in welding voltage from 17 V to 21 V causes the weld seam to widen progressively from 5.5 mm to 6.6 mm.A decrease in welding speed from 450 mm/min to 250 mm/min results in noticeable increases in both the front and backside weld widths.The optimal welding pro-cess parameters—a welding current of 130 A,a welding voltage of 18 V,and a welding speed of 400 mm/min—produce fully penetrated joints with a narrow HAZ and weld seam,exhibiting favorable formation quality.Microstructural analysis reveals that the weld seam consists of granular bainite and acicular ferrite.Tensile testing indicates that fracture occurs in the weld seam,with a tensile strength of 789 MPa.关键词
22MnB5钢/MAG焊/微观组织/力学性能/焊接工艺Key words
22MnB5 steel/microstructure/mechanical properties/welding process/MAG welding分类
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韩团结,王铎,张新戈,夏昌兴,赵振洲,阮守新,路洪洲,冯毅,王文权..工艺参数对22MnB5钢MAG焊接头成形及性能影响研究[J].电焊机,2025,55(11):64-71,81,9.基金项目
吉林省长春市重大科技专项(20240301007ZD) （20240301007ZD）
