东方汽轮机
東方汽輪機
동방기륜궤
DONGFANG TURBINE
2014年
2期
59-64
,共6页
张邦强%高振桓%聂丽萍%巩秀芳
張邦彊%高振桓%聶麗萍%鞏秀芳
장방강%고진환%섭려평%공수방
IV 型裂纹%焊接接头%临界区%铁素体耐热钢
IV 型裂紋%銲接接頭%臨界區%鐵素體耐熱鋼
IV 형렬문%한접접두%림계구%철소체내열강
IV cracking%welded joint%intercritical heat affected zone%ferritic steel
文章研究了620℃超超临界机组9%Cr-Mo-Co-B 钢(CB2)焊接接头的持久性能，焊接接头采用 SMAW 方法进行焊接，焊材分别选用 MTS 5Co1和 MTS-616。持久性能实验表明焊接接头的持久强度低于母材，断裂位置发生在焊接接头的热影响区临界区(ICHAZ)，为典型的 IV 型裂纹。文章采用光学显微镜 OM 及扫描电镜 SEM 观察焊接接头的微观组织及析出相，通过对析出相的分析研究了9%Cr-Mo-Co-B 钢焊接接头的性能退化机制的成因。
文章研究瞭620℃超超臨界機組9%Cr-Mo-Co-B 鋼(CB2)銲接接頭的持久性能，銲接接頭採用 SMAW 方法進行銲接，銲材分彆選用 MTS 5Co1和 MTS-616。持久性能實驗錶明銲接接頭的持久彊度低于母材，斷裂位置髮生在銲接接頭的熱影響區臨界區(ICHAZ)，為典型的 IV 型裂紋。文章採用光學顯微鏡 OM 及掃描電鏡 SEM 觀察銲接接頭的微觀組織及析齣相，通過對析齣相的分析研究瞭9%Cr-Mo-Co-B 鋼銲接接頭的性能退化機製的成因。
문장연구료620℃초초림계궤조9%Cr-Mo-Co-B 강(CB2)한접접두적지구성능，한접접두채용 SMAW 방법진행한접，한재분별선용 MTS 5Co1화 MTS-616。지구성능실험표명한접접두적지구강도저우모재，단렬위치발생재한접접두적열영향구림계구(ICHAZ)，위전형적 IV 형렬문。문장채용광학현미경 OM 급소묘전경 SEM 관찰한접접두적미관조직급석출상，통과대석출상적분석연구료9%Cr-Mo-Co-B 강한접접두적성능퇴화궤제적성인。
The creep rupture property of welded joint of advanced 9%Cr-Mo-Co-B steel (CB2)used for 620 ℃ USC steam turbine was studied. The welded joint was prepared by shielded metal arc welding(SMAW)with matching electrodes of MTS 5Co1 and MTS-616 respectively. The result indicated that the creep strength of welded joint was weaker than that of the base material. The fracture usually occured in the intercritical heat affected zone (HAZ)of the welded joint and demonstrated a typical IV cracking. The mi-crostructure of the welded joint was investigated by using optical microscopy OM and scanning electron microscopy (SEM). The degradation mechanism of welded joint of the 9%Cr-Mo-Co-B steel was explored by analysing phases of precipitates.
