一批GCr15钢的轴承座,由于箱式可控气氛多用炉的辐射管短路,温度大幅度的超过工艺设定值,致使一炉轴承座组织过热,其组织已全部转变为针状马氏体+碳化物+少量残留奥氏体。根据JB/T 1255—2001《高碳铬轴承钢滚动轴承零件热处理技术条件》判断[1],此批产品严重过热。为避免过多的经济损 A group of GCr15 steel bearing seat, due to box controllable atmosphere multi-purpose furnace radiant tube short circuit, the temperature significantly exceeds the process set value, resulting in a furnace bearing seat tissue overheating, the organization has all been transformed into acicular martensite + Carbide + a small amount of retained austenite. According to JB / T 1255-2001 “high carbon chromium bearing steel rolling bearing parts heat treatment technology” judgment [1], this batch of product serious overheating. To avoid excessive economic damage