阅读说明：本技术 高铬合金铸球的处理工艺 (Treatment process of high-chromium alloy cast ball ) 是由 朱文星 朱万军 于 2018-07-26 设计创作，主要内容包括：本发明属于铸件制造领域,具体涉及一种高铬合金铸球的处理工艺,包括下述步骤：1)原料熔炼；2)浇注,脱氧后集渣浇注,浇注温度为1100-1200摄氏度；浇注后铸件充分凝固25-35min；3)退火,冷却后的铸件进行打磨加工后加热到1000-1200℃,保温10-15min；4)淬火,将铸造件加热至780-830℃进行淬火；淬火时间为7-8h,之后自然冷却；5)回火,温度为260-280℃。本申请得到的高铬合金铸球的处理工艺的硬度高,HPC能够达到74以上,同时,冲击韧性强,冲击值达到20J/cm2。(The invention belongs to the field of casting manufacturing, and particularly relates to a treatment process of a high-chromium alloy cast ball, which comprises the following steps: 1) smelting raw materials; 2) pouring, namely performing slag collection and pouring after deoxidation, wherein the pouring temperature is 1100-1200 ℃; fully solidifying the cast for 25-35min after pouring; 3) annealing, polishing the cooled casting, heating to 1000-1200 ℃, and preserving heat for 10-15 min; 4) quenching, namely heating the casting to 780-830 ℃ for quenching; the quenching time is 7-8h, and then the steel plate is naturally cooled; 5) the tempering temperature is 260-280 ℃. The high-chromium alloy cast ball obtained by the method has high hardness, HPC (high performance computing) can reach over 74, and meanwhile, the high-chromium alloy cast ball has strong impact toughness and an impact value of 20J/cm 2.)

1. The treatment process of the high-chromium alloy cast ball is characterized by comprising the following steps of:

1) smelting raw materials: the raw materials comprise the following components: 2.0-3.3% of C, 0.3-1.2% of Si, 1.3-2.6% of Mn, 10-13% of Cr, 0.3-1.0% of Mo, 0.25-0.50% of Cu, less than or equal to 0.1% of s, less than or equal to 0.1% of P, 0.1-0.3% of Ce, 1-3% of graphene and the balance of Fe; smelting the metal except the graphene and Ce in the raw materials, wherein the temperature of the alloy water is 1400-1500 ℃, adding the graphene and Ce into the deoxidized alloy water, continuously smelting for 10-20mins, and secondarily deoxidizing; 2) pouring, namely performing slag collection and pouring after deoxidation, wherein the pouring temperature is 1100-1200 ℃; fully solidifying the cast for 25-35min after pouring; 3) annealing, polishing the cooled casting, heating to 1000-1200 ℃, and preserving heat for 10-15 min; 4) quenching, namely heating the casting to 780-830 ℃ for quenching; the quenching time is 7-8h, and then the steel plate is naturally cooled; 5) the tempering temperature is 260-280 ℃.

2. The process of claim 1, wherein the alloy in step 1) comprises the following components: 2.8% of C, 0.8% of Si, 2.0% of Mn, 12% of Cr, 0.5% of Mo, 0.35% of Cu, less than or equal to 0.1% of s, 2% of graphene, less than or equal to 0.1% of P, 0.2% of Ce, 3% -6% of graphene and the balance of Fe.

3. The process of claim 1, comprising the steps of: vacuum melting is carried out in the melting process in the step 1), the vacuum pressure is 1.6-2.8Pa, and the melting time is 35-50 min.

Technical Field

The invention belongs to the field of casting manufacturing, and particularly relates to a treatment process of a high-chromium alloy cast ball.

Background

The wear-resistant material is reformed and opened for more than 30 years, vast scientific and technological workers in China are combined with production practice, and various novel wear-resistant materials are developed according to the specific working conditions and domestic resource conditions of equipment wear in China. Mainly divided into modified high manganese steel, medium manganese steel and ultrahigh manganese steel series; high, medium and low carbon wear resistant alloy steel series; chromium series wear-resistant white cast iron series; manganese series and boron series wear-resistant white cast iron and martensite and bainite wear-resistant nodular cast iron; bimetal composite wear-resistant materials produced by different methods; surface-treated wear-resistant materials, and the like.

Wherein, the high-chromium cast iron is a third-generation wear-resistant material developed after common white cast iron and nickel hard cast iron. Because of the characteristics of the self-organization of the high-chromium cast iron, the high-chromium cast iron has the performances of higher toughness, high-temperature strength, heat resistance, wear resistance and the like compared with the common cast iron. High-chromium cast iron has been honored as the most excellent wear-resistant material of the present generation and is increasingly widely used.

Disclosure of Invention

The invention aims to provide a treatment process of a high-chromium alloy cast ball.

In order to achieve the purpose, the invention adopts the following technical scheme:

a treatment process of a high-chromium alloy cast ball comprises the following steps:

1) smelting raw materials: the raw materials comprise the following components: 2.0-3.3% of C, 0.3-1.2% of Si, 1.3-2.6% of Mn, 10-13% of Cr, 0.3-1.0% of Mo, 0.25-0.50% of Cu, less than or equal to 0.1% of s, less than or equal to 0.1% of P, 0.1-0.3% of Ce, 1-3% of graphene and the balance of Fe; smelting the metal except the graphene and Ce in the raw materials, wherein the temperature of the alloy water is 1400-1500 ℃, adding the graphene and Ce into the deoxidized alloy water, and continuously smelting for 10-20mins for deoxidation; 2) pouring, namely performing slag collection and pouring after deoxidation, wherein the pouring temperature is 1100-1200 ℃; fully solidifying the cast for 25-35min after pouring; 3) annealing, polishing the cooled casting, heating to 1000-1200 ℃, and preserving heat for 10-15 min; 4) quenching, namely heating the casting to 780-830 ℃ for quenching; the quenching time is 7-8h, and then the steel plate is naturally cooled; 5) the tempering temperature is 260-280 ℃.

The alloy in the step 1) comprises the following components: 2.8% of C, 0.8% of Si, 2.0% of Mn, 12% of Cr, 0.5% of Mo, 0.35% of Cu, less than or equal to 0.1% of s, 2% of graphene, less than or equal to 0.1% of P, 0.2% of Ce and the balance of Fe.

The method comprises the following steps: vacuum melting is carried out in the melting process in the step 1), the vacuum pressure is 1.6-2.8Pa, and the melting time is 35-50 min.

Compared with the prior art, the invention has the beneficial effects that:

according to the method, through reasonable proportioning of the high-chromium alloy, graphene is added, the graphene can be diffused along with alloy water, when the high-chromium alloy is tempered at a low temperature, transformation of carbides and coarsening of carburization problems can be inhibited, the yield strength is improved, the alloy can obtain better toughness and toughness, meanwhile, the strength and corrosion resistance of the alloy can be improved by adding the graphene, the tensile strength and impact toughness of the alloy are enhanced by adding Si, the number of martensite can be increased by increasing the content of Mn, and the wear resistance of a casting is improved; the addition of Cu can separate out fine particles in the cooling process, and the strength of the casting is improved. Ce is rare earth element, can form high-melting-point rare earth oxide, sulfide or compound oxysulfide with O and S in steel, play the role of reducing O and S, and Ce can be slightly soluble in the matrix, refines martensite in the heat treatment process, improves the strength, toughness and wear resistance of the alloy, and in the application, through reducing the tempering temperature, can inhibit the transformation of carbide, reduce the precipitation of carbide, and improve the stability of the residual austenite. The high-chromium alloy cast ball obtained by the method has high hardness, HPC (high performance computing) can reach over 74, and meanwhile, the high-chromium alloy cast ball has strong impact toughness and an impact value of 20J/cm 2.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the following preferred embodiments.