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首页> 外国专利> METHOD OF ARC WELDING OF WELDOLET FROM AUSTENITE STEELS TO PIPELINE FROM LOW-CARBON AND LOW-ALLOY STEELS

METHOD OF ARC WELDING OF WELDOLET FROM AUSTENITE STEELS TO PIPELINE FROM LOW-CARBON AND LOW-ALLOY STEELS

机译：低碳钢和低合金钢从奥氏体钢到管道的电弧焊方法

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FIELD: electricity.;SUBSTANCE: technological hole is made in the said pipe, the edges for welding are cut and preheating of the edges is carried out. The surfacing layer is then applied to the surface of the cutting of the weldolet edges with a thickness of 3 to 5 mm. Interfacial layer is overplayed over the surfacing layer with a width not exceeding the width of the surfacing layer and a thickness of 4 to 7 mm. The filling and facing layers of the welded rolls are applied with the formation of a welded belt with a total width of at least 3 pipe walls thicknesses and cooling of the welded joint by applying a heat-insulating belt. At the same time, when applying a surfacing layer, ARMCO iron is used. When applying the interfacial layer, metal with chromium content of at least 20% and nickel of at least 40% and a relative elongation of at least 25% is used. When the filler and facing layers of welded rollers are applied, metal with chromium and nickel content not lower than their content in the metal of the weldolet and between the superimposed welded rollers the interlayer temperature is maintained between the superimposed welded rollers in the temperature range from 50 to 100 °C.;EFFECT: invention makes it possible to increase the bearing capacity and life of pipelines.;5 cl, 1 dwg,1 tbl, 1 ex
机译：领域：电力;实质：在所述管中制造工艺孔，切割用于焊接的边缘，并对边缘进行预热。然后将铺面层以3至5毫米的厚度施加到小孔边缘切割的表面。界面层在表面层上被覆盖，其宽度不超过表面层的宽度并且厚度为4至7mm。通过形成总宽度至少为3的管壁厚度的焊接带来施加焊接辊的填充层和面对层，并且通过施加隔热带来冷却焊接接头。同时，在应用堆焊层时，使用ARMCO铁。当施加界面层时，使用铬含量至少为20％，镍含量至少为40％且相对伸长率至少为25％的金属。当使用焊接辊的填充层和饰面层时，铬和镍含量不低于其在焊缝金属中的含量，并且在叠加的焊接辊之间，层间温度保持在叠加的焊接辊之间的温度范围为50至100°C .;效果：本发明可以提高管道的承载能力和使用寿命; 5 cl，1 dwg，1 tbl，1 ex

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