Preparation method of steel for flux-cored wire

A technology of flux-cored welding wire and impurity elements, which is applied in the steel rolling process and metallurgy field, can solve the problems of low tensile strength and low tensile strength, and achieve the effects of stable elongation performance, good drawing performance and high elongation

Pending Publication Date: 2021-05-07
BAOTOU IRON & STEEL GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The product produced according to this invention has good elongation performance, but its tensile strength is low, and the low tensile strength increases the risk of breaking and broken wires during the drawing process

Method used

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  • Preparation method of steel for flux-cored wire
  • Preparation method of steel for flux-cored wire
  • Preparation method of steel for flux-cored wire

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Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0025] Embodiments 1 to 3: The manufacturing method of steel for flux-cored welding wire is carried out in the following steps.

[0026] (1) The chemical composition of the steel coil in each embodiment is shown in Table 1, wherein the balance is Fe and unavoidable impurity elements.

[0027] Table 1: the chemical composition (Wt%) of each embodiment product

[0028]

[0029] (2) According to the composition ratio in Table 1, through processes such as molten iron desulfurization, converter smelting, LF refining, etc., and then through the CSP continuous casting and rolling process, cast into slabs with a thickness of 57mm, the slabs of the above embodiments are sequentially Heating, CSP hot rolling, cold flow cooling, coiling, pickling, cold rolling, bell annealing, tempering and other processes are carried out. The control parameters of each process are shown in Table 2.

[0030] Table 2: Product process parameters of each embodiment

[0031]

[0032] (3) The properti...

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Abstract

The invention discloses a preparation method of steel for a flux-cored wire. According to the preparation method, the low-carbon component design is adopted, on the premise that solution strengthening elements are not increased, the content range of all elements is strictly controlled, the content of inclusions in the smelting and casting process is controlled, the steel quality is pure, meanwhile, the initial rolling temperature, the final rolling temperature and the coiling temperature in the rolling process are controlled, the total rolling reduction rate and rolling reduction of acid rolling, cover recrystallization annealing is used, and flattening rolling is carried out to obtain the cold-rolled steel strip with excellent tensile property.

Description

technical field [0001] The invention relates to the technical field of metallurgy and steel rolling, in particular to a preparation method of steel for flux-cored welding wire. Background technique [0002] As a new generation of high-efficiency and high-performance welding materials, flux cored wire is very popular in various industries. At present, the sheath of flux-cored welding wire is mostly made of cold-rolled steel strip after drawing. Due to the different uses of the flux-cored wire, the material of the cold-rolled steel strip used in the sheath is not the same, and the sheath made of different materials has its own characteristics. pros and cons. [0003] The search found that the authorized Chinese patent application with publication number CN 102676913 A discloses cold-rolled strip steel for flux-cored welding wire and its manufacturing method. Carbon composition design, lower manufacturing cost in smelting process Carbon composition design is significantly hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/26C21D6/00C21D8/02C21D9/52C22C33/04C22C38/02C22C38/04C22C38/06
CPCC21D1/26C21D6/005C21D6/008C21D8/0221C21D9/52C22C33/04C22C38/02C22C38/04C22C38/002C22C38/06
Inventor 尚秀廷陆斌詹卢刚薛越刘哲张秀青杜智俊孙长玉张文博刘秀英贾瑞杰任海峰冯艳霞宋立全郭志
Owner BAOTOU IRON & STEEL GRP
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