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Composite steel plate preparation method based on thermit reaction

An aluminothermic reaction and composite steel plate technology, applied in the field of wear-resistant materials, can solve problems such as high cost and unsatisfactory overall mechanical properties, achieve high production efficiency, avoid alloy layer cracking, and improve composition uniformity

Active Publication Date: 2019-05-31
ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the workpiece is made of an overall wear-resistant alloy or corrosion-resistant material, not only the cost is high, but also the overall mechanical properties often cannot meet the requirements.

Method used

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  • Composite steel plate preparation method based on thermit reaction
  • Composite steel plate preparation method based on thermit reaction
  • Composite steel plate preparation method based on thermit reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The wear-resistant alloy block weighs 1kg, and its composition is vanadium (V) 3%, chromium (Cr) 18%, molybdenum (Mo) 1%, and the rest is iron:

[0035] 1) The particle size of aluminum powder is 50 mesh, and the density of iron oxide powder is 60 mesh. According to the aluminum thermal reaction equation Fe 2 o 3 +2Al=Al 2 o 3 +2Fe+ΔQ (exothermic) to prepare thermite, the weight percentage of Fe in the wear-resistant alloy is 78%, the required weight of aluminum powder is 3760.07g, the weight of iron oxide powder is 1114.29kg; the weight of vanadium wire is 30g, and the diameter is selected 0.5mm, choose 20 mesh; chrome wire weight 180g, choose 0.5mm diameter, choose 20 mesh; molybdenum wire weight 30g, choose 0.2mm diameter, choose 10 mesh.

[0036] 2) Vanadium pure metal mesh 1, chromium pure metal mesh 2, molybdenum pure metal mesh 3, Q235 steel plate substrate with round holes and blind holes, high-purity graphite cavity 5, compact 6, thermite flux 7, and magnesi...

Embodiment 2

[0042] The wear-resistant alloy block weighs 1kg, and its composition is vanadium (V) 4%, chromium (Cr) 17%, molybdenum (Mo) 1%, and the rest is iron:

[0043] 1) The particle size of aluminum powder is 50 mesh, and the density of iron oxide powder is 60 mesh. According to the aluminum thermal reaction equation Fe 2 o 3 +2Al=Al 2 o 3 +2Fe+ΔQ (exothermic) to prepare thermite, the weight percentage of Fe in the wear-resistant alloy is 78%, the weight of aluminum powder required is 3760.07g, the weight of iron oxide powder is 1114.29kg; the weight of vanadium wire is 40g, and the diameter is selected 0.4mm, choose 30 mesh; chrome wire weight 170g, choose 0.3mm diameter, choose 20 mesh; molybdenum wire weight 10g, choose 0.2mm diameter, choose 10 mesh.

[0044] 2) Vanadium pure metal mesh 1, chromium pure metal mesh 2, molybdenum pure metal mesh 3, Q235 steel plate substrate with square holes, high-purity graphite cavity 5, briquetting block 6, thermite flux 7, and magnesium le...

Embodiment 3

[0050] The wear-resistant alloy block weighs 1kg, and its composition is vanadium (V) 3%, chromium (Cr) 17%, molybdenum (Mo) 2%, and the rest is iron:

[0051] 1) The particle size of aluminum powder is 60 mesh, and the density of iron oxide powder is 60 mesh. According to the aluminum thermal reaction equation Fe 2 o 3 +2Al=Al 2 o 3 +2Fe+ΔQ (exothermic) to prepare thermite, the weight percentage of Fe in the wear-resistant alloy is 78%, the required weight of aluminum powder is 3760.07g, the weight of iron oxide powder is 1114.29kg; the weight of vanadium wire is 30g, and the diameter is selected 0.3mm, choose 20 mesh; chrome wire weight 170g, choose 0.2mm diameter, choose 10 mesh; molybdenum wire weight 20g, choose 0.3mm diameter, choose 20 mesh.

[0052] 2) Vanadium pure metal mesh 1, chromium pure metal mesh 2, molybdenum pure metal mesh 3, Q235 steel plate substrate with triangular holes, high-purity graphite cavity 5, compact 6, thermite flux 7, and magnesium lead wir...

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Abstract

The invention provides a composite steel plate preparation method based on a thermit reaction. A preparation device comprises a thermit welding agent consisting of iron oxide powder and aluminum powder, a metal net woven by magnesium leads and such pure metal wires as vanadium, chromium and molybdenum, a high-purity graphite mold cavity and a pressing block. In the preparation process, firstly, the magnesium leads are ignited to trigger the thermit reaction; under the scour effect of high-temperature molten iron, high-density molybdenum is continuously dissolved and sunk, and low-density chromium and vanadium are continuously dissolved and ascended until the mold cavity is uniformly filled; under the effect of heat conduction, the thermit reaction near mold holes is synchronously triggered; wear-resistance alloy blocks uniformly staggered and with uniform components are formed through cooling; and composite wear resisting plates can be formed by turning and grinding. Compared with a composite wear resisting plate prepared by a traditional overlaying method, the composite wear resisting plate has the advantages of uniform alloy components, high production efficiency and no crack inlarge-area wear resisting alloy layers; and when the wear resistance and the impact resistance are achieved, the welding performance of the composite wear resisting plate also can be met.

Description

technical field [0001] The invention belongs to the field of wear-resistant materials, and in particular relates to a method for preparing a composite steel plate based on an aluminothermic reaction. Background technique [0002] Partial surfaces of certain workpieces in engineering equipment are often required to have high wear resistance and corrosion resistance. If the workpiece is made of an overall wear-resistant alloy or corrosion-resistant material, not only the cost is high, but also the overall mechanical properties often cannot meet the requirements. The commonly used solution is usually to use welding technology to surfacing a layer of wear-resistant or corrosion-resistant metal or alloy on the working surface of the workpiece. [0003] As an important branch of surface engineering, surfacing welding refers to the cladding of alloy materials with certain performance on the surface of the base metal by means of heat sources. , high temperature resistance and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K23/00B23K31/02B23P15/00
Inventor 龙伟民董博文朱坤董显路全彬黄俊兰于奇黄森
Owner ZHENGZHOU RES INST OF MECHANICAL ENG CO LTD
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