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A kind of cemented carbide anti-skid nail core for automobile tire and preparation method thereof

A technology of cemented carbide and automobile tires, which is applied in the field of powder metallurgy, can solve the problems of being unable to meet the requirements of light weight and low cobalt, and low impact resistance, so as to achieve good impact resistance and reduce the consumption of alloy materials , high economical effect

Active Publication Date: 2020-12-11
ZHUZHOU MINGRI CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its density is as high as 13.6~13.9g / cm 3 , the cobalt content is 9.5-10.5%, which cannot meet the requirements of "light weight" and "low cobalt"
Chinese patent CN 107460389 B discloses a material for preparing a non-slip nail core, which uses WC and TiCN as hard phases, so the density is only 6.9-7.9g / cm 3 , which meets the requirement of "lightweight", but its cobalt content is generally around 10%, which cannot meet the requirement of "low cobalt"
Moreover, the impact resistance of this material is low, and there will be a quality risk of being easily broken when producing "miniature" anti-skid nail cores

Method used

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  • A kind of cemented carbide anti-skid nail core for automobile tire and preparation method thereof
  • A kind of cemented carbide anti-skid nail core for automobile tire and preparation method thereof
  • A kind of cemented carbide anti-skid nail core for automobile tire and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh according to the distribution ratio of each raw material component in Table 1, wherein the Fischer particle size of WC powder is 1.5 μm, Cr 3 C 2 The Fischer particle size of the powder is 1.5 μm, the Fischer particle size of the cobalt powder is 1.3 μm, the Fischer particle size of the nickel powder is 1.3 μm, the iron powder is carbonyl iron powder with a Fischer particle size of 2.0 μm and -200 mesh reduced iron powder, ( Ti, W) C has a Fischer particle size of 2.5 μm.

[0032] S1. Weigh according to the distribution ratio of each raw material component in Table 1, and then add ethanol with a concentration of 96wt% according to the volume mass ratio of ethanol to raw material component of 240ml / kg for ball milling, the ball milling speed is 36r / min, and the time is 48h , and then dry and granulate to obtain the mixture;

[0033] S2, put the mixed material obtained in S1 into a mold, and press it under a pressure of 200MPa to obtain a non-slip nail core compac...

Embodiment 2

[0037] The difference from Example 1 is that the ingredients are weighed according to the ratio of each raw material component in Example 2 in Table 1, and other conditions are the same. Such as figure 2 As shown, it is a 1500 times metallographic photograph of the hard alloy anti-skid stud core prepared in this embodiment, wherein the grain size of the α phase is 1.0 microns, and the grain size of the γ phase is 2.0 microns, and its structure is similar to that of ordinary YT hard alloys . The performance test results of the obtained cemented carbide anti-skid nail core finished product are shown in Table 2.

Embodiment 3

[0039] The difference from Example 1 is that the ingredients are weighed according to the ratio of each raw material component in Example 3 in Table 1, and other conditions are the same. Such as image 3 As shown, it is a 1500 times metallographic photograph of the hard alloy anti-skid stud core prepared in this embodiment, wherein the grain size of the α phase is 1.0 microns, and the grain size of the γ phase is 2.0 microns, and its structure is similar to that of ordinary YT hard alloys . The performance test results of the obtained cemented carbide anti-skid nail core finished product are shown in Table 2.

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Abstract

The invention discloses a hard alloy anti-skid rivet core for an automobile tire and a preparation method thereof. The hard alloy anti-skid rivet core is prepared from the following raw material components of, in percentage by mass, 1.5 to 4.0% of Co, 1.5 to 4.0% of Ni, 9.0 to 13.0% of Fe, 0.5 to 2.0% of Cr<2>C<3>, 10 to 40% of (Ti, W) C, 0.05 to 0.3% of carbon black and the balance of WC. According to the hard alloy anti-skid rivet core for the automobile tire and the preparation method thereof, the technical requirements of the hard alloy anti-skid rivet core can meet the requirements that the hardness is larger than or equal to HV<10>1350, the bending strength is larger than or equal to 1700 N / mm < 2 >, the density is smaller than or equal to 12.5 g / cm < 3 >, the RS value is 70 to 105,the cobalt content is smaller than or equal to 4%, and the market requirements of "heteromorphism", "miniaturization", "lightweight" and "low cobalt" can be met.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, and in particular relates to a hard alloy anti-skid nail core for automobile tires and a preparation method thereof. Background technique [0002] When driving in ice and snow, if ordinary tires are still used, it will cause huge safety hazards due to vehicle skidding. Therefore, in some countries in Europe, it is stipulated that winter tires with studs must be used in winter. The nail core used in the anti-skid stud is made of hard alloy material. When the car is running at high speed, the anti-skid nail core on the tire will collide with the ground, which requires the nail core to have sufficient impact resistance to avoid breaking. During the use of the tire, the wear speed of the anti-skid stud core and the wear speed of the tire rubber are basically synchronized, so that the anti-skid effect of the anti-skid stud can be realized, which requires the anti-skid stud core to have suitable wear ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08C22C29/06C22C1/05B22F3/24
CPCB22F3/24B22F2003/247B22F2998/10C22C1/051C22C29/067C22C29/08B22F9/04B22F3/02B22F3/1007
Inventor 袁四明
Owner ZHUZHOU MINGRI CEMENTED CARBIDE