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A kind of chromium-based high-temperature wear-resistant alloy and its preparation method

A high-temperature wear-resistant alloy and alloy technology, applied in the field of chromium-based high-temperature wear-resistant alloy and its preparation, can solve the problems of insufficient high-temperature wear resistance, insufficient service temperature range, insufficient processing performance, etc., and achieve high service temperature and excellent resistance to wear. Wear performance, the effect of excellent high temperature mechanical properties

Active Publication Date: 2018-02-27
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These materials have problems such as low high-temperature strength, insufficient service temperature range, insufficient high-temperature wear resistance, and insufficient processing performance.
There is still a lack of high-strength wear-resistant alloys used in environments up to 1000 °C

Method used

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  • A kind of chromium-based high-temperature wear-resistant alloy and its preparation method
  • A kind of chromium-based high-temperature wear-resistant alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A chromium-based high-temperature wear-resistant alloy Cr 70 Nb 4 Ta 4 Mo 8 W 2 Cu 12 The preparation steps are as follows:

[0020] 1) According to the mass ratio of Cr:Nb:Ta:Mo:W:Cu=70:4:4:8:2:12, weigh Cr powder with a purity of 99% and a particle size of less than 0.076mm, with a purity of 99.5% and a particle size of less than 0.044mm Nb powder, Ta powder, Mo powder and W powder, and Cu powder with a purity of 99% and a particle size of less than 0.076mm; the weighing accuracy is 0.01g. Put the above powder into a high-energy ball mill for ball milling, the ball milling time is 4 hours, and the ball-to-material ratio is 4:1. Then put the mixed powder into a graphite mold with a compressive strength greater than 70MPa, and the nominal diameter of the inner cavity of the graphite mold is 25mm.

[0021] 2) Put the graphite mold with the raw materials in step 1) into a spark plasma sintering furnace for sintering, the main process parameters are: vacuum degree l...

Embodiment 2

[0027] A chromium-based high-temperature wear-resistant alloy Cr 50 Nb 6 W 16 Cu 28 The preparation steps are as follows:

[0028] 1) According to the mass ratio Cr:Nb:W:Cu=50:6:16:28, weigh Cr powder with a purity of 99% and a particle size of less than 0.076mm, and Nb powder and W powder with a purity of 99.5% and a particle size of less than 0.044mm And Cu powder with a purity of 99% and a particle size of less than 0.076mm; the weighing accuracy is 0.01g. Put the above powder into a high-energy ball mill for ball milling, the ball milling time is 5 hours, and the ball-to-material ratio is 6:1. Then put the mixed powder into a graphite mold with a compressive strength greater than 70MPa, and the nominal diameter of the inner cavity of the graphite mold is 25mm.

[0029] 2) Put the graphite mold with raw materials in step 1) into a spark plasma sintering furnace for sintering, the main process parameters are: vacuum degree less than 10Pa, heating rate 100°C / min, sinteri...

Embodiment 3

[0035] A chromium-based high-temperature wear-resistant alloy Cr 65 Nb 6 Mo 10 W 4 Cu 15 The preparation steps are as follows:

[0036] 1) According to the mass ratio Cr:Nb:Mo:W:Cu=65:6:10:4:15, weigh Cr powder with a purity of 99% and a particle size of less than 0.076mm, and Nb with a purity of 99.5% and a particle size of less than 0.044mm Powder and W powder and Cu powder with a purity of 99% and a particle size of less than 0.076mm; the weighing accuracy is 0.01g. Put the above powder into a high-energy ball mill for ball milling, the ball milling time is 6 hours, and the ball-to-material ratio is 5:1. Then put the mixed powder into a graphite mold with a compressive strength greater than 70MPa, and the nominal diameter of the inner cavity of the graphite mold is 25mm.

[0037] 2) Put the graphite mold with the raw materials in step 1) into a spark plasma sintering furnace for sintering, the main process parameters are: vacuum degree less than 10Pa, heating rate 100...

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Abstract

The invention discloses chromium-based high-temperature abrasion-resistant alloy. According to the chromium-based high-temperature abrasion-resistant alloy, high-melting-point metal Cr serves as a base body, and low-melting-point metal Cu and refractory metal Nb, Ta, W and Mo serve as alloying and strengthening elements; the mass percent of the Cu element in the alloy is 5%-30%; the total mass percent of at least one of the refractory metal Nb and the refractory metal Ta is not larger than 10%; the total mass percent of at least one of the refractory metal W and the refractory metal Mo is not larger than 16%; and the balance of the alloy is Cr. The chromium-based high-temperature abrasion-resistant alloy is good in mechanical property and abrasion resistance at the temperature of 800 DEG C-1100 DEG C, low in friction coefficient at the same time and capable of being used for high-temperature abrasion-resistant components in aerospace, nuclear power plants, sophisticated weapons and other high-technology fields. The invention further discloses a preparation method of the chromium-based high-temperature abrasion-resistant alloy.

Description

technical field [0001] The invention relates to a chromium-based high-temperature wear-resistant alloy and a preparation method thereof. Background technique [0002] Superalloys are widely used in high-tech fields such as aerospace, nuclear power plants and sophisticated weapons. The service temperature greatly affects the various properties of the alloy. The alloy with excellent wear resistance at high temperature (about 1000°C) is one of the key materials for reliable, stable and long-life operation of major equipment in the high-tech field. In terms of high-temperature wear-resistant materials, nickel-based composites, intermetallic compound-based composites and ceramic-based composites are widely reported at present. Chinese patent CN103540780B discloses a preparation method of a high-strength nickel-based high-temperature self-lubricating composite material, which has low friction and wear characteristics at room temperature to 900°C. Chinese patent CN103540821B disc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C27/06C22C30/02C22C1/04B22F3/105
CPCB22F3/1007B22F3/105B22F2999/00C22C1/045C22C27/06C22C30/02B22F2201/20
Inventor 韩杰胜孟军虎苏博
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI