Method of improving quality of welding wire steel casting blank

Abstract

The invention relates to the field of welding wire steel, in particular to a method of improving the quality of a welding wire steel casting blank. A BZJ60-Ti gas shield welding wire is mainly used for welding high-quality carbon steel and low-alloy high-strength steel, has the requirement for the tensile strength of weld metal and has the good toughness. Meanwhile, the welding wire is required for less spatter, arc stability, good weld seam formability and the like in the welding process, that is to say, the requirements can be met just by strictly controlling chemical components of steel andpurifying the steel. The BZJ60-Ti welding wire steel comprises the chemical components: by mass, 0.06-0.10% of C, 0.60-0.90% of Si, 1.50-1.80% of Mn, less than or equal to 0.025% of P, less than or equal to 0.020% of S, 0.02-0.06% of V, 0.08-0.13% of Ti, 0.0025-0.005% of B, 0.35-0.55% of Cr, less than or equal to 0.0015% of Ca, less than or equal to 0.004% of O, less than or equal to 0.006% of N,and the balance Fe. The aspects of titanium content control, pourability control, calcium content control and the like are optimized during the production process of the welding wire steel BZJ60-Ti.The problems existing in the quality of the casting blank and weld sparkle flying are solved. The product quality is improved. The requirements of clients are met finally.

Description

technical field [0001] The invention relates to the field of welding wire steel, in particular to a method for improving the quality of welding wire steel billets. Background technique [0002] The biggest feature of welding wire steel is that it must ensure the weld quality, mechanical properties and drawing process performance requirements of welding wire welding, no pores, and small spatter, so there are strict requirements on the chemical composition of the steel. At the same time, in order to ensure the uniform performance of the welding wire, serious composition segregation is not allowed, so it is necessary to ensure that the welding wire steel has a high metallurgical quality. [0003] BZJ60-Ti hot-rolled wire rod belongs to low-carbon steel. The reason for using low-carbon steel is that the hot-rolled wire rod has good plasticity when the carbon content is low, and the wire drawing is easier. On the other hand, it can reduce the CO content of the reducing gas and re...

AI Technical Summary

Problems solved by technology

Some products produced by the steelworks have some problems, such as: BZJ60-Ti welding wire steel has high titanium content, which affects the pourability of molten steel, and flocculation occurs during pouring; and its titanium recovery rate is unstable, forming a large number of Titanium oxide in

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