堆焊法提高球墨铸铁表面硬度  

Surface Hardness Improvement of Nodular Cast Iron by Surfacing Method

作　　者：张虹[1] 张炜星[2] 

机构地区：[1]秦皇岛职业技术学院机电工程系,河北秦皇岛066100 [2]天津中德应用技术大学资产管理处,天津300350

出　　处：《铸造技术》2017年第8期1953-1954,1964,共3页Foundry Technology

摘　　要：采用堆焊技术提高球墨铸铁的表面硬度。结果表明:利用一种低碳多元合金焊条可在球墨铸铁表面形成一定厚度的熔合层,通过调整焊接工艺参数,可在熔合层组织中获得针状马氏体和残余奥氏体,有效地提高了球墨铸铁的表面硬度,且焊接开裂倾向较小。Surfacing welding technology was proposed to improve the surface hardness of nodular cast iron. The results show that a certain thickness of the fusion layer on the surface of nodular cast iron can be formed by using a low carbon multielement alloy electrode. The martensite and retained austenite in the fusion layer can be obtained by adjusting the welding process parameters, effectively improving the surface hardness of ductile iron, and decreasing the welding cracking tend.

关 键 词：球墨铸铁 堆焊技术 熔合层 硬度 

分 类 号：TG143.5[一般工业技术—材料科学与工程]