摘要
分析了 ＴＩＧ碳化钨复合合金堆焊过程中，碳化钨颗粒的蚀损机理．台架实验结果表明，热绝缘剂对碳化钨硬质相的热防护作用主要发生在堆焊过程的焊条熔化阶段：是消融隔热作用，即包裹于碳化钨颗粒周围的热绝缘剂的分解吸热作用，降低了碳化钨颗粒在电弧高温环境中的本体温度；
Corrosion mechanism of tungsten carbide particles in wear-resistant composite metal for tungsten-inert gas arc welding (TIG) has been discussed. The bench test to simulate the mode of metal transfer in electric arc bead welding process was carried out also. The experiment results show that the function of heat insulator to elevate tungsten carbide heat endurance can be considered as the following: firstly, the pyrolysis of the heat insulator coating the tungsten carbide particles absorbs a great deal of heat quantity, so arresting the temperature change of particle bodies and dropping the superhear degree of molten drop, i.e. ablation thermal insulation; secondly, as a decomposition remnant of organic polymers, the carbon reduced the dissolution speed of tungsten carbide particles in the iron-based melt because of solute atom concentration heightened.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第12期1276-1280,共5页
Acta Metallurgica Sinica
基金
国家自然科学基金资助项目 59874022
关键词
碳化钨
内热防护技术
热绝缘剂
TIG焊
堆焊
TIG bead welding
tungsten carbide
inner heat insulation technology
heat insulator
