Active solder for welding ferritic stainless steel with fined grains and preparation method of active solder

A technology of active flux and grain refinement, applied in welding equipment, welding medium, welding/cutting medium/material, etc., can solve problems such as coarse grains, and achieve the effect of grain refinement, low cost and improved strength

Active Publication Date: 2013-12-04
HUBEI HONGLU STEEL STRUCTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is exactly in order to overcome the problem that grain is coarse in the heat-affected zone of ferritic stainless steel welded joint and welding seam, provide a kind of active flux that is used for ferritic stainless steel welding fine grain and preparation method thereof, the present invention Based on Cr 2 o 3 、TiO 2 , SiO 2 , CaF 2 , NaF, Ni, TiFe, Zr eight kinds of powder as the basic components of the active flux specially used for ferritic stainless steel welding, can refine the weld grains during welding, improve the mechanical properties of the weld and resistance to intergranular corrosion ability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A kind of active flux that is used for ferritic stainless steel welding refined grain of the present embodiment is made up of the component of following mass percentage content: Cr 2 o 3 : 8.77%, TiO 2 : 5.27%, SiO 2 : 6.53%, CaF 2 : 53.03%, NaF: 14.60%, Ni: 5.50%, TiFe: 5.50%, Zr: 0.80%.

[0024] When preparing, first accurately weigh the analytical reagents of each component according to the formula ratio of active flux, and mix the components evenly; then mix all the components with ball milling steel balls and put them into the grinding tank of the planetary ball mill. The active flux is easily soluble in acid and ethanol, so here we can only choose the dry grinding method; place the grinding pot on the rotating grinding disc, set the speed of the ball mill to 220 rpm, and the grinding pot rotates with the grinding disc at the same time, and grind for 10 hours , to obtain uniform and fine active flux powder, the active flux powder particle size is 0.08 ~ 0.1mm, ...

Embodiment 2

[0027] A kind of active flux that is used for ferritic stainless steel welding refined grain of the present embodiment is made up of the component of following mass percentage content: Cr 2 o 3 : 9.77%, TiO 2 : 6.27%, SiO 2 : 7.53%, CaF 2 : 49.63%, NaF: 16.60%, Ni: 4.50%, TiFe: 4.50%, Zr: 1.20%.

[0028] The preparation method and usage method are the same as in Example 1.

Embodiment 3

[0030] A kind of active flux that is used for ferritic stainless steel welding refined grain of the present embodiment is made up of the component of following mass percentage content: Cr 2 o 3 : 9.27%, TiO 2 : 5.77%, SiO 2 : 7.03%, CaF 2 : 51.33%, NaF: 15.60%, Ni: 5.00%, TiFe: 5.00%, Zr: 1.00%.

[0031] The preparation method and usage method are the same as in Example 1.

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Abstract

The invention belongs to the field of welding materials, and discloses an active solder for welding ferritic stainless steel with fined grains and a preparation method of the active solder. The active solder is formed by the following components of 8.77-9.77 mass percentage of Cr2O3, 5.27-6.27 mass percentage of TiO2, 6.53-7.53 mass percentage of SiO2, 49.33-53.33 mass percentage of CaF2, 14.60-16.60 mass percentage of NaF, 4.50-5.50 mass percentage of Ni, 4.50-5.50 mass percentage of TiFe and 0.80-1.20 mass percentage of Zr. By using the active solder disclosed by the invention, the fined grains at the welding seam of the ferritic stainless steel can be obviously fined, the mechanical properties of the welding seams can be improved, the intergranular corrosion-resistant capacity of the welding seams can be improved and the cost is low.

Description

technical field [0001] The invention belongs to the field of welding materials, in particular to an active flux used for ferritic stainless steel welding to refine grains and a preparation method thereof, which can significantly refine the grains of ferritic stainless steel welds and improve the strength of welds , hardness and plasticity, and improve the intergranular corrosion resistance of the weld. Background technique [0002] Since the British Henry Brearley (Harry Brearley) developed stainless steel at the beginning of the 20th century, stainless steel has developed rapidly due to its good corrosion resistance, beautiful appearance and many other advantages. Up to now, five types of stainless steel have been formed, namely: Martensitic stainless steel, ferritic stainless steel, austenitic stainless steel, duplex stainless steel, precipitation hardening stainless steel. Among them, austenitic stainless steel has always occupied a dominant position due to its excellent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/362
Inventor 刘顺洪易镇权利
Owner HUBEI HONGLU STEEL STRUCTURE
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