机械制造文摘-焊接分册
機械製造文摘-銲接分冊
궤계제조문적-한접분책
JIXIE ZHIZAO WENZHAI (HANJIE FENCE)
2015年
3期
17-23
,共7页
熔合区裂纹%异种钢焊缝%奥氏体与非奥氏体钢%低氢工艺%马氏体
鎔閤區裂紋%異種鋼銲縫%奧氏體與非奧氏體鋼%低氫工藝%馬氏體
용합구렬문%이충강한봉%오씨체여비오씨체강%저경공예%마씨체
fusion zone crack%dissimilar steel weld%austenite and non-austenitic steel%low hydrogen process%martensite
采用斜Y形缺口裂纹等试验方法，探讨了异种钢焊缝中熔合区裂纹与低氢工艺的关系。结果表明，在奥氏体与非奥氏体异种钢焊缝中，发现了一种沿熔合线分布的氢致冷裂纹。当冷裂纹的三要素集中于异种钢焊缝熔合区时，该区域则成为接头的薄弱环节，极易形成裂纹。在影响因素中，熔合区组织特性是裂纹产生的必要条件，应力水平和氢的分布特征则是充分条件。低氢工艺的选用原则即“合于使用”原则。焊接工艺与裂纹之关系，实质上反映的是焊缝中氢和应力与裂纹间的关系。
採用斜Y形缺口裂紋等試驗方法，探討瞭異種鋼銲縫中鎔閤區裂紋與低氫工藝的關繫。結果錶明，在奧氏體與非奧氏體異種鋼銲縫中，髮現瞭一種沿鎔閤線分佈的氫緻冷裂紋。噹冷裂紋的三要素集中于異種鋼銲縫鎔閤區時，該區域則成為接頭的薄弱環節，極易形成裂紋。在影響因素中，鎔閤區組織特性是裂紋產生的必要條件，應力水平和氫的分佈特徵則是充分條件。低氫工藝的選用原則即“閤于使用”原則。銲接工藝與裂紋之關繫，實質上反映的是銲縫中氫和應力與裂紋間的關繫。
채용사Y형결구렬문등시험방법，탐토료이충강한봉중용합구렬문여저경공예적관계。결과표명，재오씨체여비오씨체이충강한봉중，발현료일충연용합선분포적경치랭렬문。당랭렬문적삼요소집중우이충강한봉용합구시，해구역칙성위접두적박약배절，겁역형성렬문。재영향인소중，용합구조직특성시렬문산생적필요조건，응력수평화경적분포특정칙시충분조건。저경공예적선용원칙즉“합우사용”원칙。한접공예여렬문지관계，실질상반영적시한봉중경화응력여렬문간적관계。
The relationship between fusion zone crack and low hydrogen process in dissimilar steel welds was discussed by using slit type cracking test methods etc.The results show that the hydrogen induced cold cracking along the fusion line in the austenite and non-austenitic dissimilar steel welds is found.The area has become the weak link of the joint when the cold crack three factors are focused on the fusion zone of dissimilar steel welds, so it is very easy to form cracks on the area.The microstructure characteristics of fusion zone are the necessary condition of the cracks to form in the influencing factors, the stress level and distribution of hydrogen are suffi-cient condition.The principle for selecting low hydrogen process is principle of “fitness for purpose”.The rela-tionship between the welding process and crack essentially reflects the relationships between hydrogen, stress and crack in weld metal.
