兵器材料科学与工程
兵器材料科學與工程
병기재료과학여공정
Ordnance Material Science and Engineering
2013年
3期
66-67,68
,共3页
AZ31B%镁合金%TIG%微观组织%剪切强度
AZ31B%鎂閤金%TIG%微觀組織%剪切彊度
AZ31B%미합금%TIG%미관조직%전절강도
AZ31B%magnesium alloy%TIG%microstructure%shear strength
采用交流TIG焊对2.0 mm厚的变形镁合金AZ31B薄板进行焊接试验，利用扫描电镜、能谱分析、剪切试验对焊接接头的显微组织、元素分布、断口形貌、接头强度等进行分析。结果表明，焊缝区镁元素存在一定的氧化烧损，焊缝剪切强度为21 MPa，剪切强度值较低，焊缝接头断口有明显的河流花样，呈现脆性准解理断裂形式。
採用交流TIG銲對2.0 mm厚的變形鎂閤金AZ31B薄闆進行銲接試驗，利用掃描電鏡、能譜分析、剪切試驗對銲接接頭的顯微組織、元素分佈、斷口形貌、接頭彊度等進行分析。結果錶明，銲縫區鎂元素存在一定的氧化燒損，銲縫剪切彊度為21 MPa，剪切彊度值較低，銲縫接頭斷口有明顯的河流花樣，呈現脆性準解理斷裂形式。
채용교류TIG한대2.0 mm후적변형미합금AZ31B박판진행한접시험，이용소묘전경、능보분석、전절시험대한접접두적현미조직、원소분포、단구형모、접두강도등진행분석。결과표명，한봉구미원소존재일정적양화소손，한봉전절강도위21 MPa，전절강도치교저，한봉접두단구유명현적하류화양，정현취성준해리단렬형식。
The AC TIG welding test of magnesium alloy AZ31B plates with the thickness of 2.0 mm was carried out. The microstructure,element distribution,fracture morphology,joint strength were investigated by scanning electron microscope, energy spectrum analysis,shear test of welded joint. The results show that magnesium element in welded zone has certain oxidation loss,the shear strength of welded joint is as low as 21 MPa. The fracture surface is brittle quasi?cleavage fracture, which is characterized by river pattern.
