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研究了感应加热淬火工艺参数对轮毂轴承法兰内圈淬火硬化层和组织的影响。结果表明,随着感应加热总能量的提升,淬硬区宏观轮廓逐渐增大,淬硬层深度加深;内圈淬硬区表层及次表层正常组织为细针马氏体+板条马氏体,淬火加热总能量过高会导致表层过热而形成粗针马氏体,甚至过烧;过渡区正常组织为细针马氏体及少量的铁素体+屈氏体,淬火加热总能量过低会导致过渡区形成大量的屈氏体组织,同时残留铁素体量也会增多。感应淬火加热功率180 k W,加热时间5.4 s为最佳的工艺参数。
The influence of induction hardening process parameters on the hardened layer and microstructure of the inner ring of hub bearing flange was studied. The results show that with the increase of the total energy of induction heating, the macroscopic profile of hardened zone gradually increases and the depth of hardened layer deepens. The normal and superficial layers of the inner and outer hardened zone are fine needle martensite + lath martensite , Quenching the total heating energy will lead to overheating the surface to form a thick needle martensite, or even over-burning; transition zone normal fine needle martensite and a small amount of ferrite + troostite, quenching the total energy is too low Will lead to the formation of a large number of transitional troostite tissue, while the amount of residual ferrite will increase. Induction hardening heating power 180 k W, heating time 5.4 s is the best process parameters.