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High alkalinity, low activity, superlow hydrogen sintering type solder

A low-activity, ultra-low hydrogen technology, applied in the direction of welding medium, welding equipment, welding/cutting medium/material, etc., to achieve the effect of improving low-temperature toughness, reducing diffusible hydrogen, and improving moisture absorption resistance

Inactive Publication Date: 2008-03-12
LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some of the above-mentioned fluxes have added carbonate, the excessively high sintering temperature makes the carbonate hardly remain in the finished flux

Method used

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  • High alkalinity, low activity, superlow hydrogen sintering type solder
  • High alkalinity, low activity, superlow hydrogen sintering type solder
  • High alkalinity, low activity, superlow hydrogen sintering type solder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] Propose embodiment of the present invention as follows:

[0029] The specific chemical composition of the embodiment is shown in Table 1, two kinds of 10NiCrMoTi welding wires and one kind of 05Ni3Mn2MoTi welding wires are used for welding. The steel plate welded by 10NiCrMoTi welding wire is 16mm thick 11MCrMoV steel plate, and the steel plate welded by 05Ni3Mn2MoTi welding wire is 24mm thick 10CrNi3MoV steel plate. The chemical composition of the two welding wires is shown in Table 2. The chemical composition and mechanical properties of the weld metal were measured after welding. Listed in Table 5.

[0030] The flux chemical composition (wt%) of the embodiment of table 1

[0031] category

MgO

CaF 2

al 2 o 3

SiO 2

CaCO 3

BaCO 3

Na 2 o

Li 2 CO 3

R E f

Example A

30

18

21

10

7

8

3

2

1

Example B

33

14

17

13

9 ...

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Abstract

The sintered welding flux with high alkalinity, low activity and ultralow hydrogen content consists of MgO 28-33 wt%, CaF2 12-20 wt%, Al2O3 16-22 wt%, SiO2 8-15 wt%, CaCO3 5-10 wt%, BaCO3 5-10 wt%, Na2O 2-4 wt%, Li2CO31-4 wt% and ReF 2-6 wt%. It has high grain strength, moisture absorbing resistance and S and P content meeting the requirement of relevant national standard, diffusion hydrogen content lower than 5 ml / 100 g. It is fitted with 10NiCrMoTi welding wire and 05Ni3Mn2MoTi welding wire for low temperature no-preheating welding in ship yard and can result in excellent joint mechanical performance. It has excellent technological performance, smooth weld seam, good spreading, smooth transition to the base material and good slag eliminating performance.

Description

Technical field [0001] The invention belongs to flux for welding technology, and relates to a high-alkalinity, low-activity, ultra-low-hydrogen sintered flux, which is mainly used for submerged arc welding of low-alloy high-strength steel. Background technique [0002] Approval number CN87102741B "High Alkalinity Sintered Flux" introduces a sintered flux for welding low-alloy high-strength steel, especially thick-walled steel, using BaO-MgO-CaF 2 -Al 2 o 3 Slag system and Na 2 AlF 6 and Li 2 O and other sintering agents, mainly by adding the above-mentioned sintering agents to improve the moisture absorption resistance of the flux; [0003] Publication number CN86102751A "ultra-low hydrogen high alkalinity sintered flux" introduces a sintered flux mainly used for welding low-alloy high-strength steel, especially thick-walled steel, and adopts MgO-CaO-Al 2 o 3 -CaF 2 Slag system, flux alkalinity 2.3~2.6, the main feature is that the weld metal does not increase Si, do...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/362
Inventor 姚润钢孔红雨刘刚周浩
Owner LUOYANG SHUANGRUI SPECIAL ALLOY MATERIALS
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