Sintered flux for stainless steel

A technology of sintering flux and stainless steel, which is applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc.

Inactive Publication Date: 2009-11-25
THE LINCOLN ELECTRIC HELI ZHENGZHOU WELDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the above background. By adding a small amount of fluorinated rare earth elements and adjusting the flux formula, the present invention solves the problems of crystal lines in the middle of the stainless steel submerged arc welding

Method used

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  • Sintered flux for stainless steel
  • Sintered flux for stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composition of flux formulation 1 is shown in Table 1.

[0023] Table 1 Flux Composition of Formulation 1

[0024] edit

No

SiO 2

MnO

MgO

Al 2 O 3

CaF 2

TiO 2

iron

combine

gold

CaCO 3

Na 3 AlF 6

Fluorine

change

thin

soil

match

square 1

3

5

5

35

39

3

2

4

2

2

[0025] The mechanical properties of the deposited metal shall be tested in accordance with the provisions of GB17854-1999. The base metal is 1Cr18Ni9Ti stainless steel structural steel, the specification is 650mm×150mm×8mm, the welding wire is H0Cr21Ni10 welding wire, the specification is 3.2mm, the current is 380~400A, the arc vol...

Embodiment 2

[0029] The composition of flux formulation 2 is shown in Table 3.

[0030] Table 3 Flux Composition of Recipe 2

[0031]

edit

No

SiO 2

MnO

MgO

Al 2 O 3

CaF 2

TiO 2

iron

combine

gold

CaCO 3

Na 3 AlF 6

Fluorine

change

thin

soil

match

square 2

5

3

4.5

30

45

2

1.5

2

4

3

[0032] The hot wall hydrogenation reactor is the core equipment of the petroleum hydrogenation unit. The base material is 2.25Cr1Mo steel, and the inner wall surfacing layer is 00Cr20Ni10Nb stainless steel. The mechanical properties of the material will deteriorate under high temperature and high ...

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PUM

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Abstract

The present invention provides a sintered flux for stainless steel. The slag system of the flux is CaF2-Al2O3. The invention is characterized in that the oxidability and the sensibility of the gas hole are small. The stainless steel structure and the stainless steel overlaying welding can be welded when the sintered flux is matched with the corresponding welding stick. The invention is characterized in that the sintered flux comprises the following components: more than 40% by weight of calcium fluoride (CaF2), and furthermore the summation of the calcium fluoride and aluminum oxide (CaF2+Al2O3) is larger than or equal to 70% by weight; other components as follows: smaller than or equal to 5% by weight of CaCO3, 1-3% by weight of CrO3, smaller than 4% by weight of NaAlF6, 1-3% by weight of rare earth fluoride, 3-10% by weight of SiO2, 3-10% by weight of MnO, 1-3% by weight of TiO2, 5-10% by weight of MgO, and 1-3% of iron alloy; and bonding agent of sodium potassium silicate.

Description

technical field [0001] The invention is a sintered flux for stainless steel submerged arc welding, which is suitable for welding and surfacing welding of various stainless steels in combination with corresponding welding wires. Background technique [0002] At present, the welding of stainless steel usually adopts melting flux, such as HJ150, HJ151, HJ172, HJ260, etc. HJ150 and HJ151 are medium-silicon weak oxidation fluxes. Due to the high content of alloying elements in stainless steel, they still have a large oxidation effect, which is easy to cause a decrease in the resistance to intergranular corrosion and hot cracking. HJ260 is a high-silicon flux, and its oxidizing property is stronger than the first two. HJ172 is a low-silicon and low-manganese neutral flux, with little oxidation, but low resistance to porosity, and it is easy to generate pores in the weld. The sintering temperature of the sintered flux is lower than that of the smelted flux, and some components ca...

Claims

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Application Information

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IPC IPC(8): B23K35/362
Inventor 张红卫王根士郑彦红
Owner THE LINCOLN ELECTRIC HELI ZHENGZHOU WELDING MATERIALS
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