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Q345B低合金高强结构钢已经广泛应用于车辆、船舶、压力容器等,由于其具有良好的综合力学性能,低温性能和焊接性良好,Q345B无缝钢管也已经在油田管道工程中得以推广。而在冬季低温条件下施工,焊接质量是保证施工质量的关键因素。结合低合金高强度结构钢的综合性能及冬季施工的条件,采取该技术措施可以保证Q345B无缝钢管冬季焊接质量。
Q345B low-alloy high-strength structural steel has been widely used in vehicles, ships, pressure vessels, etc., because of its good mechanical properties, low temperature performance and good weldability, Q345B seamless steel pipe has also been promoted in the oil pipeline project. In the winter low temperature construction, welding quality is to ensure the construction quality of the key factors. Combined with the comprehensive performance of low-alloy high-strength structural steel and winter construction conditions, the technical measures can be taken to ensure the Q345B seamless steel pipe winter welding quality.