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大型容器如氧气转炉的应力消除一直成为问题,如不易提供足以容纳整个转炉的大型热处理炉,将转炉移至大型加热炉(假如能够设置),又随之产生了在制造和加热炉场地的吊装困难,以及在陆地上运输大型容器的价格昂贵。因此通常将大型容器预制成数件尽量小而轻的构件,置于普通热处理炉中处理,然后运至最终目的地装配。其接缝处及焊接件采用电阻局部热处理。现HBC Barge公司与Cooperheat公司共同开发出替代这种费时
Stress relief in large vessels such as oxygen furnaces has been a problem, as it is not easy to provide a large heat-treatment furnace enough to hold the entire converter, move the converter to a large furnace, if one can be installed, Difficulties and the cost of shipping large containers on land are expensive. It is therefore common practice to prefabricate large containers into pieces that are as small and lightweight as possible, placed in a normal heat treatment furnace and shipped to the final destination for assembly. The joints and welding parts using local resistance heat treatment. Now HBC Barge and Cooperheat co-developed to replace this time-consuming