Wear resistant surfacing alloy containing ceramic phase with molybdenum and chromium elements and production technology thereof

A ceramic phase and alloy technology, applied in the field of material science, can solve problems such as expensive alloy elements, increase production costs, and complex processes, and achieve the effects of simplifying the preparation method, increasing bonding strength, and reducing costs

Inactive Publication Date: 2014-05-07
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that the alloying elements are more expensive and the cost is high.
[0007] It can be seen from the above that although they all have good wear resistance and crack resistance, most of the published wear-resistant surfacing alloy materials add a large amount of expensive alloy elements, or directly add ceramic phases with high microhardness, or prepare All kinds of welding rods with complicated process, which ...

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  • Wear resistant surfacing alloy containing ceramic phase with molybdenum and chromium elements and production technology thereof
  • Wear resistant surfacing alloy containing ceramic phase with molybdenum and chromium elements and production technology thereof
  • Wear resistant surfacing alloy containing ceramic phase with molybdenum and chromium elements and production technology thereof

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Effect test

Embodiment 1

[0030] The wear-resistant surfacing alloy of the ceramic phase containing Mo and Cr elements, according to the mass percentage of elements, Cr30%, Mo3%, Ni0.5%, C6%, the balance is iron element and other inevitable impurities.

[0031] The above alloy system is used for plasma surfacing, and the hardness of the surfacing layer reaches 56-60HRC. The MMU-5G material end face high-temperature friction and wear tester is used for the pin wear test. The wear test parameters: speed 200r / min, test force 300N, wear time 5min, the test temperature is 500°C. The wear amount of the surfacing layer is 0.3317g, and the microstructure of the surfacing alloy is shown in figure 1 .

Embodiment 2

[0033] The wear-resistant surfacing alloy of the ceramic phase containing Mo and Cr elements, according to the mass percentage of elements, Cr25%, Mo4%, Ni0.8%, C7%, and the balance is iron and other inevitable impurities.

[0034] The above-mentioned alloy materials are used for plasma surfacing, and the hardness of the surfacing layer reaches 50-58HRC. The MMU-5G material end face high-temperature friction and wear testing machine is used for the pin wear test. The wear test parameters: speed 200r / min, test force 300N, wear The time is 5 minutes, and the test temperature is 500°C. The wear amount of the surfacing layer is 0.3929g, and the microstructure of the surfacing alloy is shown in figure 2 .

Embodiment 3

[0036] The wear-resistant surfacing alloy of the ceramic phase containing Mo and Cr elements, according to the mass percentage of elements, Cr20%, Mo5%, Ni1%, C8%, the balance is iron element and other inevitable impurities.

[0037]The above-mentioned alloy materials are used for plasma surfacing, and the hardness of the surfacing layer is 50-55HRC. The MMU-5G material end face high-temperature friction and wear testing machine is used for the pin wear test. The wear test parameters are rotation frequency 200r / min, test force 300N, The wear time is 5min, and the test temperature is 500°C. The wear amount of the surfacing layer is 0.2919g, and the microstructure of the surfacing alloy is shown in Fig. 3.

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Abstract

The invention discloses a wear resistant surfacing alloy containing ceramic phase with molybdenum and chromium elements and a production technology thereof. The wear resistant surfacing alloy containing the ceramic phase with the molybdenum and chromium elements is characterized in that alloy composition comprises 15 to 30 % of chromium, 3 to 12 % of molybdenum, 0.5 to 1 % of nickel, 6 to 10 % of carbon and the remaining is ferrum and unavoidable impurities. The production technology of the wear resistant surfacing alloy containing the ceramic phase with the molybdenum and chromium elements comprises mechanically mixing ferrochrome powder, molybdenum powder, nickel powder, graphite and reduced iron powder; uniformly mixing through a dry type ball mill of a ball grinder; coating the powder on a carbon steel plate after the powder is cooled; uniformly mixing into a coating layer with the thickness of 4 mm through water glass; standing under room temperature; drying in a drying oven; enabling the temperature to be cooled to the room temperature in the drying oven; performing ion surfacing. The production technology of the wear resistant surfacing alloy containing the ceramic phase with the molybdenum and chromium elements has the advantages of being simple in technological process, less in added alloy variety and low in cost and enabling hard phase of obtained alloy surfacing layer to be good in bonding performance with base materials, not easy to fall off, high in rigidity and wear resistance, obvious in adhesive wear resistant effect compared with other iron-based surfacing wear resistant alloy.

Description

technical field [0001] The invention relates to a wear-resistant surfacing alloy and a preparation process thereof, in particular to a wear-resistant surfacing alloy containing ceramic phases of Mo and Cr elements and a preparation process thereof, belonging to the field of material science. Background technique [0002] Wear is one of the most important reasons for material loss. How to improve the wear resistance of materials has always been a hot research topic for scientists. With the rapid development of automobiles, aviation and high-speed railways, the speed requirements for vehicles have been continuously increased, and higher requirements must be put forward for the stability and life of the braking system. Brake pads, as the core components of the braking system, are not effective. In other words, it can be seen that the optimization of the alloy system of wear-resistant materials for brake pads and the simplification and perfection of the preparation process have ...

Claims

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Application Information

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IPC IPC(8): B23K35/30B23K10/02C22C38/56
CPCB23K10/027B23K35/308C22C38/56
Inventor 刘政军吴德广苏允海
Owner SHENYANG POLYTECHNIC UNIV
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