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calidad de tubos sin costura laminados en caliente

Noticias de la compañía

calidad de tubos sin costura laminados en caliente
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¿Cómo comprobar la calidad de los tubos sin costura laminados en caliente?

Fecha:2022-05-25Vista:437Etiquetas:calidad de tubos sin costura laminados en caliente

How to test the quality of hot rolled seamless steel pipe?


1. High quality inspection of permeable layer and core. Check whether the strength of the surface and the core meets the technical standards, whether the gradient direction of the intensity conversion from the surface to the interior is effective, and whether the surface strength is consistent;

2. Check the shape change and crack of the hot-rolled seamless pipe. The seamless steel pipe that has been cut after nitriding, heat treatment and quenching can be produced and processed immediately if the shape variable is within the specified range. For deformation deviations, straightening should be performed. Cracked seamless steel pipes are usually broken and resolved immediately.


seamless steel pipe


3. Raw material inspection of hot-rolled seamless pipe. In addition to the composition analysis, it is also necessary to check the defects of the strip mechanism, non-metallic materials, impurities, cracks and other mechanisms;
4. Check the distribution and grade identification of metallographic structure;

5. Permeation layer quality inspection. Including carburized layer depth value, carburized layer carbon concentration value, cementite distribution, retained martensite, austenite morphology and its grade identification, etc.


  
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