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
5期
100-102
,共3页
杨武林%陈东高%王有祁%刘燕林%马志华%明珠%王法科
楊武林%陳東高%王有祁%劉燕林%馬誌華%明珠%王法科
양무림%진동고%왕유기%류연림%마지화%명주%왕법과
高氮奥氏体不锈钢%熔化极惰性气体保护焊%微观组织%显微硬度%力学特性
高氮奧氏體不鏽鋼%鎔化極惰性氣體保護銲%微觀組織%顯微硬度%力學特性
고담오씨체불수강%용화겁타성기체보호한%미관조직%현미경도%역학특성
high nitrogen austenite stainless steel%metal inert-gas arc welding%microstructure%microhardness%mechanical properties
采用双丝熔化极惰性气体保护焊接（双丝MIG）方法，对厚20、40 mm的高氮奥氏体不锈钢板进行了焊接。研究了焊接接头的组织、硬度、力学特性及断口形貌。结果表明：高氮奥氏体不锈钢双丝MIG焊接热影响区和焊缝的组织为奥氏体+少量δ-铁素体，显微硬度明显低于母材；20 mm厚板双丝MIG焊接接头抗拉强度和韧性优于40 mm厚板；拉伸和冲击断口形貌为明显的韧窝。
採用雙絲鎔化極惰性氣體保護銲接（雙絲MIG）方法，對厚20、40 mm的高氮奧氏體不鏽鋼闆進行瞭銲接。研究瞭銲接接頭的組織、硬度、力學特性及斷口形貌。結果錶明：高氮奧氏體不鏽鋼雙絲MIG銲接熱影響區和銲縫的組織為奧氏體+少量δ-鐵素體，顯微硬度明顯低于母材；20 mm厚闆雙絲MIG銲接接頭抗拉彊度和韌性優于40 mm厚闆；拉伸和遲擊斷口形貌為明顯的韌窩。
채용쌍사용화겁타성기체보호한접（쌍사MIG）방법，대후20、40 mm적고담오씨체불수강판진행료한접。연구료한접접두적조직、경도、역학특성급단구형모。결과표명：고담오씨체불수강쌍사MIG한접열영향구화한봉적조직위오씨체+소량δ-철소체，현미경도명현저우모재；20 mm후판쌍사MIG한접접두항랍강도화인성우우40 mm후판；랍신화충격단구형모위명현적인와。
High nitrogen austenite stainless steel plates with thickness of 20 mm and 40 mm were welded by metal inert-gas arc welding, respectively. Microstructure, hardness, mechanical properties and fractography of welded joints were studied. Experiment results indicate that the microstructure of heat affected zone and welded joint is austenite and δ-ferrite,and the microhardness is significantly lower than that of base metal. The tensile strength and toughness of welded joints of 20 mm thick plates are higher than those of 40 mm thick plates. Fractographies of tensile and impact samples are dimple.
