摘要
采用TIG弧堆焊方法,在Q235基体上制备了以铁基高温合金GH2135为基础成分的堆焊覆层。分析了覆层的显微组织、回火抗力和高温抗氧化性能。结果表明,该覆层的显微组织主要由树枝晶γ-Fe(Cr、Ni等)固溶体及晶间α-Fe组成,金属间化合物弥散析出,晶界有少量特殊碳化物,晶粒较细小;与H13钢不同,正交组覆层的硬度随回火温度的升高而增大,700℃高温回火后,正交组中1A覆层的硬度(346 HV0.1)最大。较基础配方覆层10J、H13钢,1A涂层硬度分别提高约50、82 HV0.1,而11K覆层硬度(349 HV0.1)又高于1A覆层,回火抗力最优;11K覆层的抗高温氧化性能优异,其在600、700℃氧化试验的单位面积氧化增重仅为H13钢的1/8、1/3。
The overlaying coatings with the basic composition of iron-based superalloy GH2135 were prepared on Q235 steel substrate by TIG overlaying. The microstructure, tempering resistance and high temperature oxidation resistance of the coatings were studied. The results show that that the microstructure of the coating is composed of dendrites γ-Fe （Cr, Ni, etc.） solid solution and intergranular α-Fe. The intermetallic compound precipitates, and a few special carbides appear in grain boundaries. Unlike H 13 steel, the hardness of the orthogonal group layer increases with the increase of tempering temperature. After 700℃ high temperature tempering, the hardness （346 HV0.1） of 1A coating is largest in the orthogonal group. Compared with the basic formula cladding 10 J and H13 steel, the 1A coating＇s hardness increases respectively about 50 and 82 HV0.1.11K coating＇s hardness （349 HV0.1） is higher than that of I A coating,then the tempering resistance is optimum. The 11 K coating shows the excellent high temperature oxidation resistance, and its oxidation mass per unit area is merely 1/8, 1/3 of ill3 steel at 600 and 700℃ oxidation experiments, respectively.
出处
《热加工工艺》
CSCD
北大核心
2016年第8期1-6,共6页
Hot Working Technology
基金
国家自然科学基金项目(51475346)
佛山市顺德区经济和科技促进局技术创新专项资金项目(2012CX040)
关键词
TIG弧堆焊
铁基高温合金
显微组织
回火抗力
抗高温氧化性
TIG overlayin
iron-based superalloy
microstructur
temperingresistanc
high temperature oxidation resistance
