喷焊修复工艺 1.喷焊材料选择一般情况下,机床导轨面的材料为HT20～40灰铸铁。为使修复后的导轨面便于再加工,选用了“粉103铁”。该粉末是一种低硬度的镍-铁-硅-硼合金,自熔性好,线膨胀系数接近于铸铁。这种自熔合金不但熔点低,而且还能与其它金属氧化物一起,熔融成硼硅酸盐,保护喷焊层。在喷焊过程中,由于粒子相互渗溶,喷焊层与母材互相扩散,形成一个 Spray welding repair process 1. Spray welding material selection Under normal circumstances, the machine guide rail surface material HT20 ~ 40 gray cast iron. In order to facilitate the re-processing of the rail surface after rework, use the “powder 103 iron.” The powder is a low hardness nickel-iron-silicon-boron alloy, good self-flux, linear expansion coefficient close to cast iron. This self-fluxing alloy not only low melting point, but also with other metal oxides, fused into borosilicate, to protect the spray coating. In the spray process, due to the mutual infiltration of particles, spray coating and base metal diffusion to each other to form a