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首先談談在我們所設計的热处理車間中采用时主要工艺。所設計車間的基础是現代的先进热处理工艺,如:高頻率电加热淬火、气体渗碳、表面强化处理、用噴丸代替噴砂等。高頻率电加热淬火的应用范圍愈来愈广。以大同机車厂为例,除襯套,軸銷等小零件外,像活塞杆、滑板、月牙板等滲碳件已改用了高頻率淬火,每台机車高頻率热处理件的重量达2.6吨,占全部热处理件重量的60％。显然,高頻率电加热淬火与老的工艺(渗碳和全部淬火)相比,有很多优点。以上这些零件大都是采用連續方法淬火,因而不要求發电机有很大的功率,所以投資亦不很大。由于有可能准确地控制高頻电加热淬火規范,所以便可得出稳定的变形尺寸,繼而定出合适的磨加工余量和降低加工劳动量。
Let’s talk about the main process when we use the heat treatment plant we designed. The basis of the designed workshop is a modern advanced heat treatment process, such as: high-frequency electric heating quenching, gas carburizing, surface strengthening treatment, and shot blasting instead of sandblasting. The application of high frequency electric heating quenching is becoming wider and wider. Taking Datong Motor Vehicle Factory as an example, in addition to the small parts such as bushings and shaft pins, the carburized parts such as piston rods, slide plates, and crescent plates have been replaced with high-frequency quenching, and the weight of heat-treating parts per locomotive is high. 2.6 tons, accounting for 60% of the weight of all heat treated parts. Obviously, high frequency electric heating quenching has many advantages over the old process (carburizing and full quenching). Most of these parts are quenched using a continuous process, so the generator is not required to have a lot of power, so the investment is not very large. Since it is possible to accurately control high-frequency electric heating quenching specifications, it is possible to obtain a stable deformation size, and then set a suitable grinding allowance and reduce the amount of processing labor.