论文部分内容阅读
我厂原先采用平面螺旋形感应器高频加 热淬火的方法来提高气门小头端面的硬度, 质量一直很不稳定。后来参考有关资料,在 平面螺旋形感应器上浇注导磁体进行高频加 热淬火,效果显著。 一、浇注导磁体感应器原理 在感应器上浇注一层磁性指标很高的导 磁体(需要用来加热的部位不浇注),以改 变磁场强度的分布,迫使磁力线集中分布, 让较多的电流偏聚在接近于工作的加热表 面。由于该处产生较大的感应电流,因而加 热速度快,克服了气门小头外圆和中心部位 加热配合不好的缺点,保证了硬度和硬化层 深度的统一。
Our factory originally used high-frequency planar spiral inductor quenching method to improve the hardness of valve head face, the quality has always been very unstable. Later reference to the relevant information, in the plane spiral inductor on the casting of high-frequency induction hardening heat, the effect is significant. First, the casting principle of inductors Pouring inductors on the sensor layer of high magnetic permeability of the magnet (need to heat the parts do not pour) to change the distribution of magnetic field strength, forcing the magnetic lines concentrated distribution, so that more current Polygons close to the work of the heating surface. As a result of a large induction current, so the heating speed, to overcome the small valve head and the central part of the poor heating and heating disadvantages, to ensure the unity of the hardness and depth of the hardened layer.