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铬轴承钢中的碳化物相偏析必须采取从锭到坯,又以坯到材的两次高温固溶(锻轧)并随之强制淬入沸水,在水中冷到500—600℃时出水强韧化才能达到改善的目的。为确保钢中碳化物分布均匀,锻轧固溶温度不得低于1220℃。初冷淬水时水温不低于70℃,钢在沸水中振动冷却使钢表面或楞角刚出现黑色(平面中心暗红色)即行出水空冷以获得索氏体组织。然后球化退火,可有效地改善钢材碳化物相.
Carbide phase segregation of chromium bearing steel must take from ingot to billet, and billet to the two high-temperature solution (forging) and forced quenching into boiling water, cold water to 500-600 ℃ when the water is strong Toughening can achieve the purpose of improvement. In order to ensure the uniform distribution of carbides in the steel, the temperature of forging and rolling solution should not be lower than 1220 ℃. Initial cold quenching water temperature not lower than 70 ℃, steel in boiling water vibration cooling so that the surface of steel or corrugated angle just appeared black (plane center dark red) that is out of water air-cooled to obtain sorbite. Then ball annealing, can effectively improve the steel carbide phase.