PP-R427是低氫鈉型藥皮含Cr2.5%-Mo1%-WVNb的耐熱鋼焊條。直流反接,短弧操作,適合全位置焊接。焊前焊件需預(yù)熱300~400℃,并保持該層間溫度。焊后需經(jīng)高溫回火處理。
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