2氣體?;ず?熱輸入,顯微組織,拉伸性能 Q460 steel,CO2 gas shielded arc welding,heat input,microstructure,tensile property ,馮祥利,王磊,劉楊"> - 弗罗西诺内美院学费|弗罗西诺内住房
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焊接材料及熱輸入對Q460鋼厚板焊接接頭拉伸性能的影響
          
Effect of Welding Material and Heat Input on Tensile Property of Welded Joint of Q460 Steel Thick Plate

摘    要
在不同熱輸入(12.6,16.4,19.5 kJ·cm-1)下分別對Q460低合金高強鋼厚板進行實心焊絲和藥芯焊絲CO2氣體?;ず?,研究了焊絲和熱輸入對接頭顯微組織及拉伸性能的影響。結果表明:隨熱輸入增加,2種接頭焊縫中柱狀晶區的針狀鐵素體比例降低,大尺寸晶界鐵素體增多;實心焊絲焊接接頭焊縫區的硬度隨熱輸入增加變化不大,藥芯焊絲焊接接頭的顯著降低;實心焊絲焊接接頭的屈服強度和抗拉強度與母材的相當,斷后伸長率明顯小于母材的,且斷后伸長率隨熱輸入的增加而降低;藥芯焊絲焊接接頭在低熱輸入下的強度與母材的相當,熱輸入的增加使抗拉強度損失顯著,但對屈服強度和斷后伸長率影響很小。
標    簽 Q460鋼   CO2氣體?;ず?/a>   顯微組織   拉伸性能   Q460 steel   CO2 gas shielded arc welding   heat input   microstructure   tensile property  
 
Abstract
Low-alloy high-strength steel Q460 thick plates were welded by CO2 gas shielded arc welding with solid wire and flux-cored wire at different heat inputs (12.6, 16.4, 19.5 kJ·cm-1). The effects of welding wire and heat input on the microstructure and tensile properties of the joint were investigated. The results show that the proportion of acicular ferrite in columnar grain zone in weld zone of the two joints decreased and the grain boundary ferrite of large size increased with the increase of heat input. The hardness of weld zone of the joint welded with solid wire changed little with the increase of heat input,but that of the joint welded with flux-cored wire decreased significantly. The yield strength and ultimate tensile strength of the joint welded with solid wire were similar to those of base metal whereas the elongation was lower than that of base metal; the elongation decreased with the increase of heat input. The strenth of the joint welded with flux-cored wire was equivalent to that of the base metal at lower heat input. The increase of heat input obviously reduced the tensile strength, but affected the yield strength and elongation slightly.

中圖分類號 TG457.11 TG111.91   DOI 10.11973/jxgccl201903001

 
  中國光學期刊網論文下載說明


所屬欄目 試驗研究

基金項目 國家自然科學基金資助項目(51571052,51371044);遼寧省自然科學基金資助項目(2014020034)

收稿日期 2018/1/16

修改稿日期 2019/1/9

網絡出版日期

作者單位點擊查看

備注馮祥利(1972-),男,河北唐山人,博士研究生

引用該論文: FENG Xiangli,WANG Lei,LIU Yang. Effect of Welding Material and Heat Input on Tensile Property of Welded Joint of Q460 Steel Thick Plate[J]. Materials for mechancial engineering, 2019, 43(3): 1~6
馮祥利,王磊,劉楊. 焊接材料及熱輸入對Q460鋼厚板焊接接頭拉伸性能的影響[J]. 機械工程材料, 2019, 43(3): 1~6


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