... or as customizedQuality assurance:Ultrasonic Test Remark:electric furnace+LF+VD, ESR is availableAplication of ... , locomotive, ship making, oil, chemical engineering, electric power, automobile, coal feeder, aviation, space flight ... production and national key construction.Processing flow: Electric arc furnace meltingrefining furnacevacuum treatment furnacecast ingotsteel ingot annealheatinghigh- ...