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我厂采用一台阳极面积为30000cm~2、电容量60A的辉光离子渗氮炉,对38CrMoAl钢气缸套内孔(φ150×278mm)进行渗氮,开始时渗氮层深浅不一和硬度不匀,综合研究有关资料,改进炉内结构,解决了这个技术难题,取得了较好的结果。 1.改进炉内结构在原来炉内装置的基础上进行了以下三处改进(见下图): (1) 增接进氨喷头原来炉子从钟罩顶部接入通径为9mm的直管引入氨气,这种结构使氨气呈单柱状流入炉内,容易引起炉内温度不均。因此,我们设计制造了一个不锈钢的莲蓬头式多孔进氨喷头,与原直通管焊接在一起,由于喷头有70个φ1.0mm小孔,使氨气成多线状进入,易于扩散成雾状,便于电离,同时喷射面积较大,流速
I plant using an anode area of 30000cm ~ 2, capacitance 60A glow ion nitriding furnace, 38CrMoAl steel cylinder liner bore (φ150 × 278mm) nitriding, the beginning of the nitriding layer of varying depth and hardness is not Uniform, comprehensive study of the relevant information to improve the furnace structure to solve this technical problems, and achieved good results. 1. To improve the structure of the furnace In the original furnace device on the basis of the following three improvements (see below): (1) add the ammonia nozzle The original furnace from the top of the bell access straight pipe diameter of 9mm Ammonia, this structure allows ammonia into a single columnar flow into the furnace, easily lead to uneven temperature furnace. Therefore, we design and manufacture a stainless steel shower head porous ammonia nozzle, welded together with the original straight pipe, the nozzle has 70 φ1.0mm holes, ammonia into a multi-linear access, easy to spread into a mist, Easy ionization, while spraying a larger area, the flow rate