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High-chromium wear-resistant steel ball and preparation method thereof

A technology of wear-resistant steel and high chromium, which is applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve the problems of brittle cracking, reduced toughness of steel balls, and reduced service life of steel balls, so as to increase toughness and increase mechanical properties , Increase the effect of hardenability

Inactive Publication Date: 2016-12-07
ANHUI RUITAI NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wear resistance of steel balls is often improved by increasing the chromium content in steel balls, but higher chromium content will reduce the toughness of steel balls, make them brittle, and reduce the service life of steel balls. Therefore, the research and development of wear-resistant Steel balls with a balance of sex and toughness are urgently needed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A high chromium wear-resistant steel ball, the weight percentage of each component is as follows: C: 1%; Si: 0.7%; Mn: 1.2%; Cr: 14%; Ni: 0.03%; Mo: 0.12%; W: 0.1%; Al: 0.1%; Cu: 0.1%; B: 0.004%; Ti: 0.02%; Nb: 0.3%; V: 0.15%; P: 0.02%; S: 0.01%;

[0018] Among them, Nb+10.3(C / Cr)=1.04%.

[0019] The preparation method of the above-mentioned high chromium wear-resistant steel ball comprises the following steps:

[0020] S1. Smelting and casting: smelting scrap steel, adding carbon, silicon, manganese, chromium, nickel, molybdenum, tungsten, aluminum, copper, boron, titanium, niobium and vanadium to adjust the composition to meet the above range, and casting out of the furnace. The temperature of casting out of the furnace is 1600 ℃, air cooling to obtain spherical castings;

[0021] S2. Heat treatment: Take the spherical casting obtained in S1, heat up to 550°C, keep it warm for 2 hours, raise the temperature to 850°C at a rate of 5°C / min, keep it warm for 20 minutes,...

Embodiment 2

[0023] A high chromium wear-resistant steel ball, the weight percentage of each component is as follows: C: 1.5%; Si: 0.5%; Mn: 1.4%; Cr: 12%; Ni: 0.05%; Mo: 0.1%; W: 0.3%; Al: 0.08%; Cu: 0.2%; B: 0.003%; Ti: 0.03%; Nb: 0.2%; V: 0.2%; P: 0.015%; S: 0.008%;

[0024] Among them, Nb+10.3(C / Cr)=1.49%.

[0025] The preparation method of the above-mentioned high chromium wear-resistant steel ball comprises the following steps:

[0026] S1. Smelting and casting: smelting scrap steel, adding carbon, silicon, manganese, chromium, nickel, molybdenum, tungsten, aluminum, copper, boron, titanium, niobium, vanadium to adjust the composition to meet the above range, and casting out of the furnace. The temperature of casting out of the furnace is 1500 ℃, air cooling to obtain spherical castings;

[0027] S2. Heat treatment: Take the spherical casting obtained in S1, heat up to 650°C, keep it warm for 1 hour, raise the temperature to 800°C at a rate of 7°C / min, keep it warm for 30 minutes, ...

Embodiment 3

[0029] A high chromium wear-resistant steel ball, the weight percentage of each component is as follows: C: 1.1%; Si: 0.65%; Mn: 1.25%; Cr: 13.5%; Ni: 0.035%; Mo: 0.115%; W: 0.15%; Al: 0.095%; Cu: 0.12%; B: 0.0038%; Ti: 0.022%; Nb: 0.27%; V: 0.17%; P: 0.013%; S: 0.006%;

[0030] Among them, Nb+10.3(C / Cr)=1.11%.

[0031] The preparation method of the above-mentioned high chromium wear-resistant steel ball comprises the following steps:

[0032] S1. Smelting and casting: smelting scrap steel, adding carbon, silicon, manganese, chromium, nickel, molybdenum, tungsten, aluminum, copper, boron, titanium, niobium and vanadium to adjust the composition to meet the above range, and casting out of the furnace. The temperature of casting out of the furnace is 1580 ℃, air cooling to obtain spherical castings;

[0033] S2. Heat treatment: Take the spherical casting obtained in S1, raise the temperature to 570°C, keep it warm for 1.8h, raise the temperature to 840°C at a rate of 5.5°C / min...

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Abstract

The invention discloses a high-chromium wear-resistant steel ball. The high-chromium wear-resistant steel ball comprises, by weight percentage, 1-1.5% of C, 0.5-0.7% of Si, 1.2-1.4% of Mn, 12-14% of Cr, 0.03-0.05% of Ni, 0.1-0.12% of Mo, 0.1-0.3% of W, 0.08-0.1% of Al, 0.1-0.2% of Cu, 0.003-0.004% of B, 0.02-0.03% of Ti, 0.2-0.3% of Nb, 0.15-0.2% of V, not larger than 0.2% of P, not larger than 0.01% of S and the balance Fe, wherein the expression of Nb+10.3(C / Cr)<1.55% is met. The invention further discloses a preparation method of the high-chromium wear-resistant steel ball. The high-chromium wear-resistant steel ball and the preparation method have the beneficial effects that wear resistance is good and toughness is high.

Description

technical field [0001] The invention relates to the technical field of grinding machinery, in particular to a high-chromium wear-resistant steel ball and a preparation method thereof. Background technique [0002] Wear-resistant steel balls have been widely used in metallurgy, mineral processing, building materials, chemical industry, electric power and other industrial production. At present, the wear resistance of steel balls is often improved by increasing the chromium content in steel balls, but higher chromium content will reduce the toughness of steel balls, make them brittle, and reduce the service life of steel balls. Therefore, the research and development of wear-resistant A steel ball with a balance of sex and toughness has become a top priority. Contents of the invention [0003] Based on the technical problems in the background technology, the present invention proposes a high-chromium wear-resistant steel ball and a preparation method thereof. The present in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/44C22C38/06C22C38/42C22C38/54C22C38/50C22C38/48C22C38/46C21D9/36C21D1/18
CPCC22C38/44C21D1/18C21D9/36C22C38/06C22C38/42C22C38/46C22C38/48C22C38/50C22C38/54
Inventor 唐荣朱冬祥阮和平赵娜娜吴玢
Owner ANHUI RUITAI NEW MATERIALS TECH
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