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随着机械产品向“大型化”发展,在化工、炼油及原子能压力容器的设计和制造中出现了新的特点,如普遍采用低合金高强度钢、容器容量参数提高、容器壁厚增大、焊接工艺的改进等。目前,国内外高压容器以锻焊复合结构为多,容器壁厚在70～300毫米范围内。而适应此厚度的焊接方法仍以电渣焊、埋弧自动焊、窄间隙气保护焊、氩弧焊、手工电弧焊等为主。但是,根据国内生产压力容器的能力不同,所选用的焊接方法也不同。我厂对承制的一批省内外厚壁高压容器的环缝焊
With the development of “large-scale” mechanical products, new features have emerged in the design and manufacture of chemical, refining and nuclear pressure vessels. For example, low-alloy high-strength steel is generally used, the capacity of the container is increased, the wall thickness of the container is increased, Improve the welding process. At present, the pressure vessel at home and abroad to forging welded composite structure as much as the container wall thickness in the range of 70 to 300 mm. And adapt to the thickness of the welding method is still electroslag welding, submerged arc welding, narrow gap gas shielded welding, argon arc welding, hand arc welding, etc. based. However, depending on the capacity of the domestic production of pressure vessels, the welding method used is also different. I plant on the system of a number of provincial and municipal thick-walled high-pressure container ring seam welding