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Composite powder doped with active agent and application method thereof

A technology of composite powder and active agent, which is applied in the field of composite powder doped with active agent, can solve the problems of composite powder surfacing alloy performance control and optimization restrictions, and the constraints of the preset amount of composite powder, so as to reduce free hydrogen The source, the addition amount is stable and controllable, and the effect of long storage time

Active Publication Date: 2022-01-28
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the influence of the arc shape and heat production, in order to ensure good overall fusion of the surfacing alloy layer, the preset amount of composite powder particles is relatively restricted, and the powder filling rate (filling powder rate = melting weight of composite powder particles / (composite powder particles Melting weight + solid wire melting weight)) is generally below 0.45, which limits the performance control and optimization of composite powder surfacing alloys

Method used

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  • Composite powder doped with active agent and application method thereof
  • Composite powder doped with active agent and application method thereof
  • Composite powder doped with active agent and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Before weighing the components, first pass the powder components such as high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, boron carbide, ferromolybdenum, and reduced iron powder through a 60-mesh sieve, and then pass the marble powder, fluorite powder, ultra-fine The powder component of graphite is passed through a 300-mesh sieve. The composition ratio (percentage by weight) of the powder components contained in the composite powder is: 70% of high-carbon ferrochrome, 5% of ferro-titanium, 4% of ferrosilicon, 3% of flake graphite, 3% of ultrafine graphite, and 2% of boron carbide. %, ferromolybdenum 2%, marble powder 1%, fluorite powder 1%, reduced iron powder 9%.

[0044] Weigh high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, ultra-fine graphite, boron carbide, ferromolybdenum, marble powder, calcium fluoride powder and reduced iron powder according to the proportioning requirements of the powder components contained in the a...

Embodiment 2

[0057] Before weighing the components, first pass the powder components such as high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, boron carbide, ferromolybdenum, and reduced iron powder through a 60-mesh sieve, and then pass the marble powder, fluorite powder, ultra-fine The powder components of graphite were passed through a 300-mesh sieve, and then weighed. The composition ratio (percentage by weight) of the powder components contained in the composite powder is: 65% of high-carbon ferrochrome, 4% of ferro-titanium, 3% of ferrosilicon, 4% of flake graphite, 2% of ultrafine graphite, and 3% of boron carbide. %, ferromolybdenum 2%, marble powder 2%, fluorite powder 0.5%, reduced iron powder 14.5%.

[0058] Weigh high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, ultra-fine graphite, boron carbide, ferromolybdenum, marble powder, fluorite powder and reduced iron powder according to the proportioning requirements of the powder components ...

Embodiment 3

[0064]Before weighing the components, first pass the powder components such as high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, boron carbide, ferromolybdenum, and reduced iron powder through a 60-mesh sieve, and then pass the marble powder, fluorite powder, ultra-fine The powder components of graphite were passed through a 300-mesh sieve, and then weighed. The composition ratio (percentage by weight) of the powder components contained in the composite powder is: 60% high-carbon ferrochrome, 6% ferro-titanium, 4% ferrosilicon, 4% flake graphite, 2.5% ultra-fine graphite, 3% boron carbide %, ferromolybdenum 3%, marble powder 1.5%, fluorite powder 0.8%, reduced iron powder 15.2%.

[0065] Weigh high-carbon ferrochrome, ferro-titanium, ferrosilicon, flake graphite, ultra-fine graphite, boron carbide, ferromolybdenum, marble powder, fluorite powder and reduced iron powder according to the proportioning requirements of the powder components contained in the co...

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Abstract

A composite powder doped with an active agent and an application method thereof. Low-temperature sintering and powder screening to form composite powder with a particle size of 5 to 15 meshes, and the composite powder and solid welding wire are used as surfacing materials to carry out self-protected open-arc surfacing, so that the active agent contained in the composite powder enters the The surfacing weld pool and arc column space play the role of purifying the weld metal, stabilizing the arc and improving the fluidity of the weld pool, and making the arc stable and lasting on the composite powder; The powder and solid wire surfacing alloys are well fused with the substrate, and the final powder filling rate is as high as 0.50 to 0.56 and primary (Fe, Cr, Mo) 7 C 3 The volume fraction of surfacing alloys is as high as 70 to 80%. The surfacing alloy is a typical hypereutectic structure, which fully meets practical requirements, and can be used for surfacing wear-resistant alloy layers for parts under abrasive wear conditions, such as the wear-resistant layer on the inner wall of a concrete conveying pipe.

Description

technical field [0001] The invention belongs to the technical field of wear-resistant surfacing, and in particular relates to a composite powder doped with an active agent and an application method thereof. Background technique [0002] In recent years, in order to improve the weld penetration of tungsten argon arc welding (TIG), the activated TIG technology, namely A-TIG, is proposed. This technology mainly applies the active agent containing certain material components to the weldment before welding In the base metal welding area, the welding penetration depth is greatly increased under normal specifications, which can not only improve the strength of the welded joint, but also reduce the number of weld layers, and reduce the thermal impact on the base metal, so the thermal deformation of the workpiece is small, and the overall relatively good implementation effect. [0003] The general theory is that: the active agent decomposes under the high temperature of the arc, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/22B23K35/12B23K35/40
CPCB23K35/22B23K35/0255B23K35/40
Inventor 龚建勋刘超黄洪江艾孝文刘书同
Owner XIANGTAN UNIV
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