阅读说明：本技术 一种具有高耐磨耐蚀性的球磨机用耐磨钢球 (Wear-resistant steel ball with high wear resistance and corrosion resistance for ball mill ) 是由 段劲松 于 2019-11-12 设计创作，主要内容包括：本发明公开了一种球磨机用耐磨钢球,包括以下重量百分比的原料：C：0.8～1.8％、Cr：1～5％、Mo：1.2～1.5％、V：1.2～1.5％、Mn：0.8～1.5％、Cu：2.2～2.7％、P：0.01～0.04％、S：0.01～0.04％、Nb：0.05～0.2％、SiC：3～5％、熔炼添加剂0.1～0.3％、余量为Fe。本发明提出的一种球磨机用耐磨钢球,配方合理,保证了耐磨钢球的研磨性能,控制了生产成本,大大的提高了耐磨钢球的硬度、耐腐蚀性和耐磨性,其制备方法简单,制备成本低,所得耐磨钢球用于球磨机研磨,耗损量小,使用寿命长,性价比高,值得推广。(The invention discloses a wear-resistant steel ball for a ball mill, which comprises the following raw materials in percentage by weight: c: 0.8-1.8%, Cr: 1-5%, Mo: 1.2-1.5%, V: 1.2-1.5%, Mn: 0.8 to 1.5%, Cu: 2.2-2.7%, P: 0.01-0.04%, S: 0.01 to 0.04%, Nb: 0.05-0.2%, SiC: 3-5%, 0.1-0.3% of smelting additive and the balance of Fe. The wear-resistant steel ball for the ball mill, provided by the invention, is reasonable in formula, ensures the grinding performance of the wear-resistant steel ball, controls the production cost, greatly improves the hardness, corrosion resistance and wear resistance of the wear-resistant steel ball, is simple in preparation method and low in preparation cost, is used for grinding in the ball mill, is small in loss amount, long in service life and high in cost performance, and is worthy of popularization.)

1. A wear-resistant steel ball with high wear resistance and corrosion resistance for a ball mill comprises the following raw materials in percentage by weight: 1.2-1.5% of Mo, 1.2-1.5% of V, 2.2-2.7% of Cu, 0.01-0.04% of P, 0.01-0.04% of S, 3-5% of SiC, 0.1-0.3% of smelting additive and the balance of Fe; the method is characterized in that: the material also comprises the following raw materials in percentage by weight: 0.004-0.01% of B, 0.8-1.2% of C, 12-16% of Cr, 1.0-3.0% of Mn and 0.1-0.2% of Nb;

the method for manufacturing the wear-resistant steel ball for the ball mill with high wear resistance and corrosion resistance comprises the following steps:

s1: smelting, pouring, casting and forming the raw materials of the components in percentage by weight, and cleaning to obtain a casting;

s2: preserving the heat of the casting obtained in the step A1 at 500 ℃ for 1 hour, heating at 700 ℃ for 1 hour and heating at 950 ℃ for 4 hours according to the traditional process, and then performing water quenching;

s3: and (3) heating the water-quenched casting to 300 ℃ for tempering treatment, preserving heat for 2 hours, moving the casting into a slow cooling pit, and slowly cooling to room temperature to obtain a wear-resistant steel ball finished product.

2. The steel ball with high wear resistance and corrosion resistance for the ball mill as claimed in claim 1, which is characterized by comprising the following raw materials in percentage by weight: 0.007 to 0.01 percent of B, 1 to 1.5 percent of C, 14 to 16 percent of Cr, 1.3 to 1.4 percent of Mo, 1.3 to 1.4 percent of V, 1.0 to 3.0 percent of Mn, 2.4 to 2.6 percent of Cu, 0.02 to 0.03 percent of P, 0.02 to 0.03 percent of S, 0.05 to 0.2 percent of Nb, 3 to 5 percent of SiC, 0.15 to 0.25 percent of smelting additive and the balance of Fe.

3. The steel ball with high wear resistance and corrosion resistance for the ball mill as claimed in claim 1, which is characterized by comprising the following raw materials in percentage by weight: 1.4% of Mo, 1.3% of V, 2.5% of Cu, 0.02% of P, 0.03% of S, 4% of SiC, 0.007% of B, 1.2% of C, 14% of Cr, 3.0% of Mn, 0.15% of Nb, 0.2% of smelting additive and the balance of Fe.

4. The steel ball with high wear resistance and corrosion resistance for ball mills according to claim 1, wherein the SiC is micron-sized silicon carbide whisker or nano-sized silicon carbide whisker.

5. The steel ball with high wear resistance and corrosion resistance for ball mills according to claim 1, wherein the melting additive is a composition of CaO, Na2O, Al2O3, SiO2 and TiO2 in a mass ratio of 1.5-2.2: 1.8-2: 1-1.2: 0.3-0.5.

6. The method for preparing the wear-resistant steel ball for the ball mill according to any one of claims 1 to 1, wherein in the step S1, CaO, Na2O, Al2O3, SiO2 and TiO2 are added into an ultra-fine grinding machine according to the mass ratio of 1.5-2.2: 1.8-2: 1-1.2: 0.3-0.5, and are fully ground for 3 times, and the grinding time is 15-25 min each time, so that the smelting additive is obtained.

7. The method for preparing a wear-resistant steel ball for a ball mill as set forth in claim 6, characterized in that: and (4) adding the alloy powder obtained in the step (S1) and SiC in percentage by weight into a powder mixer, mixing at a high speed of 750-950 r/min for 1-2 h, injecting into a steel ball die, and stamping by utilizing an upper stamping die and a lower stamping die to obtain a steel ball blank.

8. The method for preparing the wear-resistant steel ball for the ball mill according to claim 1, wherein the post-treatment mode of the wear-resistant steel ball obtained in the step S3 is as follows: the method applies Haokang energy and utilizes the composite energy of activation energy and impact energy to grind the surface of the metal part without grinding agent.

Technical Field

The invention relates to the technical field of alloy materials, in particular to a wear-resistant steel ball with high wear resistance and corrosion resistance for a ball mill.

Background

The wear-resistant steel ball is also called as a wear-resistant medium for a grinder, is a consumable, is mainly used for grinding materials to enable the materials to be ground more finely so as to reach the use standard, is mainly used in the fields of mines, power plants, cement plants, steel plants, silicon sand plants, coal chemical industry and the like, has the annual consumption of steel balls of 3000-5000 ten thousand tons all over the world, has the consumption of steel balls of 300-500 ten thousand tons in China, and is a country with large consumption of steel balls. The working conditions of the wear-resistant steel balls for the ball mill are very complex, and the wear-resistant steel balls bear huge impact force, stress and friction force in the high-speed running process. In addition, the steel ball is also corroded by other impurities such as lubricating oil and the like in the working process, so that the steel ball has higher requirements on the comprehensive performance of the wear-resistant steel ball. In the prior art, the wear-resistant steel balls for the ball mill mainly comprise carbon steel balls and high-chromium steel balls, wherein the wear resistance of the carbon steel balls cannot meet the grinding requirement, the service life is short, and the loss amount is large; while the high-chromium steel balls have better wear resistance, the cost is too high, the integral cost ratio is low, and the practicability is not high. Based on the statement, the invention provides a wear-resistant steel ball for a ball mill and a preparation method thereof.

Disclosure of Invention

The invention aims to solve the defects in the prior art, and provides a wear-resistant steel ball with high wear resistance and corrosion resistance for a ball mill.

In order to achieve the purpose, the invention adopts the following technical scheme: a wear-resistant steel ball with high wear resistance and corrosion resistance for a ball mill comprises the following raw materials in percentage by weight: 1.2-1.5% of Mo, 1.2-1.5% of V, 2.2-2.7% of Cu, 0.01-0.04% of P, 0.01-0.04% of S, 3-5% of SiC, 0.1-0.3% of smelting additive and the balance of Fe; wherein, the material also comprises the following raw materials by weight percentage: 0.004-0.01% of B, 0.8-1.2% of C, 12-16% of Cr, 1.0-3.0% of Mn and 0.1-0.2% of Nb;

the method for manufacturing the wear-resistant steel ball for the ball mill with high wear resistance and corrosion resistance comprises the following steps:

s1: smelting, pouring, casting and forming the raw materials of the components in percentage by weight, and cleaning to obtain a casting;

s2: preserving the heat of the casting obtained in the step A1 at 500 ℃ for 1 hour, heating at 700 ℃ for 1 hour and heating at 950 ℃ for 4 hours according to the traditional process, and then performing water quenching;

s3: and (3) heating the water-quenched casting to 300 ℃ for tempering treatment, preserving heat for 2 hours, moving the casting into a slow cooling pit, and slowly cooling to room temperature to obtain a wear-resistant steel ball finished product.

Preferably, the feed comprises the following raw materials in percentage by weight: 0.007 to 0.01 percent of B, 1 to 1.5 percent of C, 14 to 16 percent of Cr, 1.3 to 1.4 percent of Mo, 1.3 to 1.4 percent of V, 1.0 to 3.0 percent of Mn, 2.4 to 2.6 percent of Cu, 0.02 to 0.03 percent of P, 0.02 to 0.03 percent of S, 0.05 to 0.2 percent of Nb, 3 to 5 percent of SiC, 0.15 to 0.25 percent of smelting additive and the balance of Fe.

Preferably, the feed comprises the following raw materials in percentage by weight: 1.4% of Mo, 1.3% of V, 2.5% of Cu, 0.02% of P, 0.03% of S, 4% of SiC, 0.007% of B, 1.2% of C, 14% of Cr, 3.0% of Mn, 0.15% of Nb, 0.2% of smelting additive and the balance of Fe.

Preferably, the SiC is micron-scale silicon carbide whisker or nano-scale silicon carbide whisker.

Preferably, the smelting additive is a composition of CaO, Na2O, Al2O3, SiO2 and TiO2 in a mass ratio of 1.5-2.2: 1.8-2: 1-1.2: 0.3-0.5;

preferably, in the step S1, CaO, Na2O, Al2O3, SiO2 and TiO2 are added into a superfine grinding machine according to the mass ratio of 1.5-2.2: 1.8-2: 1-1.2: 0.3-0.5, and are fully ground for 3 times, wherein the grinding time is 15-25 min each time, and the smelting additive is obtained.

Preferably, the alloy powder obtained in the step S1 and the SiC with the weight percentage are added into a powder mixer together, mixed at a high speed of 750-950 r/min for 1-2 h, injected into a steel ball die, and punched by an upper punch die and a lower punch die to form a steel ball blank.

Preferably, the post-processing method of the wear-resistant steel ball obtained in the step S3 is as follows: the method applies Haokang energy and utilizes the composite energy of activation energy and impact energy to grind the surface of the metal part without grinding agent.

Has the advantages that: compared with the prior art, the invention has the beneficial effects that: the contents of C, Cr, Mo, V, P and S are strictly controlled, the grinding performance of the wear-resistant steel ball is ensured, the production cost is controlled, the hardness, the corrosion resistance and the wear resistance of the wear-resistant steel ball are greatly improved by adding micron-scale or nano-scale SiC whiskers in the formula.

Drawings

FIG. 1 shows a heat treatment process of high chromium steel in a wear-resistant steel ball for a ball mill with high wear resistance and corrosion resistance.

FIG. 2 is a table showing the change of mechanical properties of the ball mill steel ball with high wear resistance and corrosion resistance after boron element is added.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.