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在焊接时,正确地应用预热,后热的焊后热处理工艺,有助于焊接质量的提高。过去在这方面大都采用的是传统的、耗能大的工频加热、火焰加热或花较大投资制造的大型加热炉进行焊前预热和焊后热处理。现介绍一种新颖的电加热器,该电加热器共有三种型式,现分别简介如下。 JL 型履带式加热器:JL型履带式加热器是由耐高温优质镍铬电阻丝和高级陶瓷绝缘器件,按特殊工艺要求编结而成(见图1),这是一种在
In the welding, the correct application of preheating, post-heat heat treatment after welding, contribute to the improvement of welding quality. In the past mostly used in this area is the traditional, energy-consuming large frequency heating, flame heating or spend large investment in the manufacture of large furnace preheat and post-weld heat treatment. Now introduced a novel electric heater, the electric heater there are three types, are introduced as follows respectively. JL-type crawler heaters: JL-type crawler heaters are high-quality high-quality nickel-chromium resistance wire and high-grade ceramic insulation devices, compiled according to special requirements (see Figure 1), which is a