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Iron-based powder alloy and argon arc surfacing technology utilizing same

An iron-based powder and alloy technology, applied in arc welding equipment, welding medium, welding equipment and other directions, can solve the problems of decreased surfacing welding quality, easy oxidation of alloy powder, difficult engineering application, etc., to reduce labor intensity and reduce equipment investment. , the effect of simple process

Inactive Publication Date: 2014-09-24
SHANDONG JIANZHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Argon arc surfacing technology has been studied by domestic scholars in recent years, but all of them are based on the basic research of argon arc surfacing layer, such as the structure and performance analysis of argon arc surfacing layer, and the argon arc surfacing process is always limited to the alloy The powder is coated on the surface of the surfacing metal with water glass as a binder, and then it is dried and then used for argon arc surfacing. This process brings difficulties in practical engineering applications. The powder is easily oxidized by high-temperature baking at the surfacing temperature, which reduces the quality of the surfacing welding

Method used

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  • Iron-based powder alloy and argon arc surfacing technology utilizing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of iron base powder alloy, its main component is: the mol ratio of its component is: Fe-V: Fe-B: C=1.0: 0.05: 1.0; Wherein, Fe-V composition is wt% to be 65% V, 2.0% Al, 0.5% Si, 0.01% C, the rest of Fe; the Fe-B composition is 25% B, 0.5% Al, 1.0% Si, 0.01% C, 0.5% Mn, and the rest of Fe by weight.

[0025] The above-mentioned iron-based powder alloy is applied to the argon arc surfacing technology, and the specific steps are as follows:

[0026] (1), configure Fe-V, Fe-B, graphite-iron-based powder alloy, the composition mol ratio is: Fe-V: Fe-B: C = 1.0: 0.05: 1.0;

[0027] (2), mix the powder evenly with water glass, and press it on the mould;

[0028] (3), dry naturally for 5 hours, take out the thin slice and dry it at 60°C for 2 hours at low temperature;

[0029] (4), select Q235 (low carbon steel), Q345 (low alloy steel) materials for surfacing;

[0030] (5), natural cooling after welding.

Embodiment 2

[0032] A kind of iron base powder alloy, its main component is: the mol ratio of its component is: Fe-V: Fe-B: C=1.0: 0.08: 0.5; Wherein, Fe-V composition is wt% is 75% V, 1.0% Al, 1.0% Si, 0.05% C, Fe balance; Fe-B composition is 20% B, 1.0% Al, 0.5% Si, 0.1% C, 0.3% Mn, Fe balance.

[0033] The above-mentioned iron-based powder alloy is applied to the argon arc surfacing technology, and the specific steps are as follows:

[0034] (1), configure Fe-V, Fe-B, graphite-iron-based powder alloy, the composition mol ratio is: Fe-V: Fe-B: C = 1.0: 0.08: 0.5;

[0035] (2), mix the powder evenly with water glass, and press it on the mould;

[0036](3), dry naturally for 5 hours, take out the thin slice and dry it at a low temperature of 120°C for 1.5 hours;

[0037] (4), select Q235 (low carbon steel), Q345 (low alloy steel) materials for surfacing;

[0038] (5), natural cooling after welding.

Embodiment 3

[0040] A kind of iron base powder alloy, its main component is: the mol ratio of its component is: Fe-V: Fe-B: C=1.0: 0.1: 0.8; Wherein, Fe-V composition is wt% to be 70% V, 1.5% Al, 0.2% Si, 0.1% C, Fe balance; Fe-B composition is 22.5% B, 1.5% Al, 0.1% Si, 0.05% C, 0.1% Mn, Fe balance.

[0041] The above-mentioned iron-based powder alloy is applied to the argon arc surfacing technology, and the specific steps are as follows:

[0042] (1), configure Fe-V, Fe-B, graphite-iron-based powder alloy, the composition mol ratio is: Fe-V: Fe-B: C = 1.0: 0.1: 0.8;

[0043] (2), mix the powder evenly with water glass, and press it on the mould;

[0044] (3) Dry naturally for 5 hours, take out the thin slice and dry it at 90°C for 1 hour at low temperature;

[0045] (4), select Q235 (low carbon steel), Q345 (low alloy steel) materials for surfacing;

[0046] (5), natural cooling after welding.

[0047] The average surface hardness of the argon arc surfacing welding layer measured by ...

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Abstract

The invention relates to the field of material welding, in particular to an iron-based powder alloy and an argon arc surfacing technology utilizing the same. The argon arc surfacing technology is characterized in that Fe-V, Fe-B and powdered graphite are made into sheets, and an argon tungsten-arc welding machine is used for realizing surfacing on low carbon steel or low alloy steel. The formation of weld seams is excellent without pores, included slag and cracks, and the dilution rate of a transition layer is small, therefore, the argon arc surfacing technology can be effectively used in a repair technology for parts such as moulds, gears, shaft ends and the like. An argon arc welding clad layer of Fe-V, Fe-B and powdered graphite has fine grain size, disperse distribution of compounds and molten surface hardness up to 60 HRC.

Description

technical field [0001] The invention relates to the field of material welding, in particular to an iron-based powder alloy and an argon arc surfacing technology using the alloy. Background technique [0002] Mechanical parts usually fail in the form of corrosion and wear during use, resulting in deviations in the surface dimensions of the workpiece, seriously affecting the normal operation of the machine, and many production lines are forced to stop production to replace new parts, which not only reduces production efficiency, but also manufacturing The cost is also greatly increased. For example, fans, steam turbines, compressors, flue gas turbines, etc., which have a high failure rate in the petrochemical industry, are fan blades, steam turbine high-speed rotors, support tile journals, partitions, compressor rotor impellers, blades, journals, and smoke machines. Blades and discs are the main parts, and the main failure modes are gas erosion and corrosion; in the metallurg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/30B23K9/04B23K9/16
Inventor 罗辉张元彬霍玉双刘鹏景财年杨凤琦黄柏颖孙壵李朝龙任辛未
Owner SHANDONG JIANZHU UNIV
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