A wear-resistant surfacing alloy containing ceramic phases of mo and cr elements and its preparation process

A ceramic phase and alloy technology, applied in the field of material science, can solve the problems of increasing production costs, precious alloy elements, and non-appearance, and achieve the effects of increasing bonding strength, simplifying preparation methods, and improving fluidity

Inactive Publication Date: 2016-04-06
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 increases the production cost
At the same time, after consulting relevant literature, it is known that the application field of wear-resistant materials for automobile brake pads is limited to directly adding hard phases and forming them through high-temperature sintering and pressing, which is too expensive.
However, there has not been an example of in-situ autogenous formation of a ceramic hard phase as a brake pad skeleton to resist wear.

Method used

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  • A wear-resistant surfacing alloy containing ceramic phases of mo and cr elements and its preparation process
  • A wear-resistant surfacing alloy containing ceramic phases of mo and cr elements and its preparation process
  • A wear-resistant surfacing alloy containing ceramic phases of mo and cr elements and its preparation process

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Experimental program
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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

A wear-resistant surfacing alloy containing ceramic phases of Mo and Cr elements and its preparation process are characterized in that: the alloy composition is Cr15-30%, Mo3-12%, Ni0.5-1%, C6-10%, The balance is Fe and unavoidable impurities; the preparation process is to mechanically mix ferrochromium powder, molybdenum powder, nickel powder, graphite and reduced iron powder, and then use a ball mill to dry-type ball mill to mix evenly, and coat the powder on carbon after cooling. On the steel plate, and then uniformly mixed with water glass to form a coating layer with a thickness of 4mm; stand at room temperature, dry in a drying furnace, cool to room temperature in the furnace, and perform plasma surfacing. The preparation process of the present invention is simple, there are few kinds of alloys to be added, and the cost is low. Compared with other iron-based surfacing wear-resistant alloys, it has a significant effect on resisting adhesive wear.

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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Patent Type & Authority Patents(China)
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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