热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2014年
5期
75-78,86
,共5页
任延明%刘福广%李太江%王彩侠%李巍%邓先刚%罗祥%王东
任延明%劉福廣%李太江%王綵俠%李巍%鄧先剛%囉祥%王東
임연명%류복엄%리태강%왕채협%리외%산선강%라상%왕동
汽轮机叶片%20Cr13 马氏体耐热钢%焊接接头%热影响区粗晶区%Ni基焊材
汽輪機葉片%20Cr13 馬氏體耐熱鋼%銲接接頭%熱影響區粗晶區%Ni基銲材
기륜궤협편%20Cr13 마씨체내열강%한접접두%열영향구조정구%Ni기한재
steam turbine blade%20Cr13 martensitic heat resistant steel%welded joints%coarse re-gion of HAZ%Ni base filling metal
对Ni基焊材的20Cr13马氏体耐热钢焊态异种钢接头的组织与力学性能进行了试验研究，分析了此类焊接接头的薄弱部位，提出了工艺改进措施。试验结果表明，焊态异种钢接头的抗拉强度可以达到母材的90％以上，热影响区粗晶区是此类接头的薄弱部位；采用多层多道的小规范焊接工艺并补加焊接回火焊道，可以使20Cr13钢热影响区粗晶区的性能得到改善。
對Ni基銲材的20Cr13馬氏體耐熱鋼銲態異種鋼接頭的組織與力學性能進行瞭試驗研究，分析瞭此類銲接接頭的薄弱部位，提齣瞭工藝改進措施。試驗結果錶明，銲態異種鋼接頭的抗拉彊度可以達到母材的90％以上，熱影響區粗晶區是此類接頭的薄弱部位；採用多層多道的小規範銲接工藝併補加銲接迴火銲道，可以使20Cr13鋼熱影響區粗晶區的性能得到改善。
대Ni기한재적20Cr13마씨체내열강한태이충강접두적조직여역학성능진행료시험연구，분석료차류한접접두적박약부위，제출료공예개진조시。시험결과표명，한태이충강접두적항랍강도가이체도모재적90％이상，열영향구조정구시차류접두적박약부위；채용다층다도적소규범한접공예병보가한접회화한도，가이사20Cr13강열영향구조정구적성능득도개선。
Experimental study on microstructure and mechanical properties of dissimilar steel wel-ded joints of 20Cr13 martensitic heat-resistant steel for steam turbine blade without PWHT were conducted.Moreover,the weak parts of these kinds of j oints were analyzed and process improve-ment measures were proposed.The results show that,the tensile strength of 20Cr13 steel welded joints using Ni base filler metal without PWHT can reach over 90% of parent metal's and coarse grain HAZ are weak zone of the welded joints.Multi-pass welding process of low welding heat input and temper bead should be used with the purpose of coarse grain regions'brittlement reduction.
