Composite cored wire comprising solid calcium metal, silicon iron and magnesium-rare earth alloy containing multiple elements

Abstract

The invention relates to an alloy cored wire, in particular to a composite cored wire comprising solid calcium metal, silicon iron and magnesium-rare earth alloy containing multiple elements. The outer layer of the cored wire is a common steel belt with the thickness of 0.3-0.5 mm. A core layer comprises a rare earth-magnesium alloy powder layer, an intermediate protective layer and a solid calcium metal wire. The solid calcium metal wire is wrapped by the intermediate protective layer. The intermediate protective layer is wrapped by the rare earth-magnesium alloy powder layer. The rare earth-magnesium alloy powder layer comprises silicon iron powder and rare earth-magnesium alloy powder. The mass ratio of the solid calcium metal wire to the silicon iron powder to the rare earth-magnesium alloy powder is 1:1-2:1-5. The granularity of the silicon iron powder and the rare earth-magnesium alloy powder is smaller than 3 mm. By means of the way that the cored wire is added into microalloyed steel, the calcium and magnesium treating process is stable, the high absorption rate is obtained, and existing problems are well solved. In addition, the composite cored wire has the advantages that storage time is longer and the yield is more stable, and has remarkable economic benefits.

Description

technical field [0001] The invention relates to an alloy powder cored wire. Background technique [0002] my country's steel industry is at its peak in history. In the next few years, it is estimated that my country's annual steel output will reach 1.8 billion tons, and the cored wire market will reach more than 5 billion yuan. According to the statistics of the World Iron and Steel Association, in 2011, the total steel output of all countries in the world reached 1.6 billion tons, an increase of 15%; while China ranked first in the world with an output of 700 million tons. In addition, with the continuous advancement of science and technology, various projects Structural design tends to be high-parameter, lightweight and large-scale. The performance of steel materials requires higher strength and better toughness. Core-spun wire feeding processing technology plays an indispensable and important role in this. [0003] Obtaining products with higher purity and higher uniform...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a composite cored wire of solid metal calcium, ferrosilicon and magnesium rare earth alloy containing various elements, which can be added to microalloyed steel by adopting the method of cored wire to make calcium and magnesium treatment The process is stable and has a high absorption rate, so that the current problems are better solved