Hardfacing alloy containing silicon and chromium composite ceramic phases and manufacturing process thereof
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A composite ceramic and alloy technology, applied in the field of material science, can solve the problems of complex preparation process of surfacing alloy, expensive alloy elements, increase production cost, etc., and achieve the effects of improved bonding, simple preparation method and increased production cost.
Active Publication Date: 2014-04-23
辽宁谱瑞科技有限公司
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Although the amount of alloying elements added in the present invention is reduced to some extent, its application range is mainly in oil wells and petrochemical equipment, and its preparation process is relatively complicated, and the cost increases
[0006] In summary, although a series of inventions have good wear resistance, the announced wear-resistant surfacing alloy materials or the addition of a large number of alloy elements, or the addition of expensive alloy elements, or the preparation process of the surfacing alloy Complicated, these will increase the production cost
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Embodiment 1
[0024] A wear-resistant surfacing alloy containing Si and Cr composite ceramic phase. According to the mass percentage of elements, Cr 20%, Si 0.5%, Ni 1%, C 6%, and the balance is iron element and other inevitable impurities.
[0025] The above alloy system and preparation method are used for plasma surfacing welding. The hardness of the surfacing layer is 55-62HRC. 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 300r / min, test force 200N , the wear time is 3min, the wear amount of the surfacing layer is 0.0011g, and the microstructure of the surfacing alloy is shown in figure 1 .
Embodiment 2
[0027] A wear-resistant surfacing alloy containing Si and Cr composite ceramic phase. According to the mass percentage of elements, Cr 15%, Si 2%, Ni 1%, C 8%, and the balance is iron element and other inevitable impurities.
[0028] The above-mentioned alloy materials are used for plasma surfacing welding. The hardness of the surfacing layer is 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 are rotation frequency 300r / min and test force 200N. The wear time is 3 minutes, the wear amount of the surfacing layer is 0.0012g, and the microstructure of the surfacing alloy is shown in figure 2 .
Embodiment 3
[0030] A wear-resistant surfacing alloy containing Si and Cr composite ceramic phase. According to the mass percentage of elements, Cr 10%, Si 3%, Ni 3%, C 8%, and the balance is iron element and other inevitable impurities.
[0031] The above-mentioned alloy materials are used for plasma surfacing welding. 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 300r / min and test force 200N. The wear time is 3 minutes, the wear amount of the surfacing layer is 0.0019g, and the microstructure of the surfacing alloy is shown in image 3 .
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Abstract
The invention provides a hardfacing alloy containing silicon and chromium composite ceramic phases and a manufacturing process thereof. The hardfacing alloy is characterized that ingredients of the hardfacing alloy comprises 10-20 percent of chromium, 0.5-5 percent of silicon, 1-4 percent of nickel, 5-10 percent of carbon, balance ferrum and inevitable impurities. The manufacturing process of the hardfacing alloy includes the first step of carrying out calculation and mechanical mixing on ferrochromium powder, molybdenum powder, nickel powder, graphite and reduced iron powder according to element mass percent, mixing all the powder evenly in a dry-type ball milling mode through a ball grinding mill to enable the granularity of the powder to reach 60-160 meshes, and taking out the powder, the second step of drying the powder in a drying oven for one to two hours and then enabling the temperature in the oven to cool down to the indoor temperature, and the third step of adding the powder into a powder feeder and then carrying out plasma arc surfacing on the powder to form a hardfacing layer. The manufacturing process is easy to operate, the kinds of the additive alloys are fewer, and the obtained hardfacing alloy is low in cost, good in binding performance between the hardfacing layer hard phases and base materials and not prone to falling off, and has the advantages of high hardness, high abrasion resistance and high temperature oxidation resistance.
Description
technical field [0001] The invention is applied in the field of material science, and in particular relates to a wear-resistant surfacing alloy containing Si and Cr composite ceramic phases and a preparation process thereof. Background technique [0002] With the great development of the global industry, there has been a shortage of resources worldwide, and saving resources has become more and more important. As one of the most important reasons for material loss, abrasion consumes a lot of resources. Therefore, how to improve the wear resistance of materials has become a topic of worldwide concern. As the guarantee of automobile safety, the braking system has always been the focus of research and attention. Due to the rapid increase in the speed of vehicles, the safety, stability and service life of the braking system are required to be higher. As the heart of the brake system, the wear resistance and high temperature oxidation resistance of the brake pads must be improve...
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