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机车滑板表面要求淬火硬化,有些工厂采用高频加热淬火,曾因出现过一些缺陷而导致废品或返修,经过适当措施后,生产已基本满足需要.本厂用仿苏式??3～60型的双振荡管式高频设备,相继地得出了淬火层的硬度、深度、金相组织和电气参数之间的某些关系. 一、硬化层深度表面淬火硬化层深度由高频发生器的频率决定.为充分发挥高频加热的优越性,电流的热渗透度应等于淬火硬化层深度的2～3倍,即能获得最佳加热层,为此设备的频率应满足以下关系:
Locomotive skateboard surface quench hardening requirements, some factories use high-frequency heating quenching, there have been some defects and lead to scrap or rework, after appropriate measures, the production has been basically meet the needs of the factory with imitation Soviet-type ?? 3 ~ 60 Of the double-oscillation tube high-frequency equipment, successively obtained the hardened layer hardness, depth, metallographic structure and electrical parameters of some relationship between a hardened depth of surface hardened hardened layer by the high-frequency generator Frequency. To give full play to the advantages of high frequency heating, the current thermal permeability should be equal to the depth of quench hardened layer 2 to 3 times, which can get the best heating layer, for which the frequency of the device should meet the following relationship: