新型奥氏体耐热钢HR3C焊接工艺及接头性能研究进展

新型奥氏体耐热钢HR3C焊接工艺及接头性能研究进展 Research development on welding process and joint properties of new austenitic heat-resistant steel HR3C 张骏 ZHANG Jun 1 first-author 中国大唐集团科学技术研究院有限公司西北电力试验研究院 中国大唐集团科学技术研究院有限公司西北电力试验研究院 China Datang Corporation Science and Technological Research Institute Northwest Power Technology Research Institute China Datang Corporation Science and Technological Research Institute Northwest Power Technology Research Institute 新型奥氏体耐热钢HR3C研发的焊材有配套焊材YT-HR3C和替代Ni基焊材（ERNiCrCoMo-1、ERNiCr-3和ERNiCrMo-3等）,为了防止焊接过程中产生热裂纹,需要严格控制焊接工艺,重点是控制层间温度小于等于100℃。在不同温度下随着时效时间的进行,焊接接头的焊缝组织未发生变化,为单一奥氏体组织（γ相）,而析出相Cr 23 C 6 、CrFe 7 C 0.45 、（Cr,Fe） 7 C 3 、CrNbN和富Cu相的数量、形态和分布发生变化,其中Cr 23 C 6 的大量析出导致接头冲击功急剧下降,表现出时效脆化现象。针对HR3C的焊材、焊接工艺和焊接接头性能的研究进展进行综述。 Welding consumables developed for the new austenitic heat-resistant steel HR3C include YT-HR3C and Ni-based consumables,the Ni-based consumables include ERNiCrCoMo-1,ERNiCr-3 and ERNiCrMo-3. It needs to strictly control the welding process in order to prevent thermal cracks during welding,the key is to control the interlayer temperature of welding ≤100 ℃,with aging time at different temperatures,the weld structure of the welded joint have no change,is single austenite structure（γ phase）,but the number,morphology and distribution of precipitated phases Cr 23 C 6 ,CrFe 7 C 0.45 ,（Cr,Fe）7C 3 ,CrNbN and Cu-rich phases change,a large amount of precipitation of Cr 23 C 6 leads to a sharp decline in the impact energy of the joint,behave aging embrittlement.This article mainly reviews the research development on welding consumables,welding processes and weld joint performance of HR3C. 奥氏体耐热钢 HR3C 焊接 时效脆化 austenitic heat-resistant steel HR3C welding aging embrittlement TG457.11 2022-03-08 3 50