【摘要】 研究了不同前处理组织的亚温淬火对35CrNiMoA钢组织和性能的影响。试验表明:亚温淬火前,予处理组织为退火或正火态时,铁素体呈块状分布;予处理组织为淬火或调质态时,铁素体呈条状分布。对上术组织的机械性能和断裂行为作了测定,并在等强度或等冲击韧性(α_k)条件下与常规调质处理进行比较。得出:亚温处理的强韧化效果不仅取决于铁素体的量,而且主要取决于它的分布形态。经亚温淬火后,铁素体呈条状分布并且控制它的量在10%左右时,能获得最佳的强韧化效果。更多还原

【Abstract】 In this paper effet of subtemperature quenching withdifferent pretreatment structures on microstructure and mrchanicalproperties of 35CrNiMo A steel has been investigated.Experiments showedthat while annealed or normalized pretreatment is used before subtemper-ature quenching, a block ferrite structure can be obtained, and while as-quenched or tempered steel is used, a strip ferrite structure can be obtained. The mechanical properties and fracture bahavior of the above structurehave also been ascertained and Compared with the normal tempered steelwhile the strength or impact toughness α_k remained essentially unchanged.the results showed that the strength-toughness effect of sub temperaturequencting is dependent not only on the percentage of ferrite phase in steel.but also mainly on its shape, and that the best strength-toughness effectby sub temperature quenching is to shape the microstructure of ferriteinto strip structure and to controll its quantity around 10%.更多还原