Unlock instant, AI-driven research and patent intelligence for your innovation.

Nanometer rare earth chromium alloy cast grinding ball and production method thereof

A technology for casting grinding balls and nano rare earths, which is applied in the field of metal grinding media, can solve the problems of increasing the manufacturing cost of grinding ball products, difficult to master the micro-alloying technology, and large oil fume on the production site, so as to solve the problems of environmental pollution and hidden safety hazards, The effect of grain refinement and lower operating costs

Active Publication Date: 2016-08-24
安徽省凤形新材料科技有限公司
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the above methods still have certain limitations in popularization in production practice. First, although the amount of chromium used has been reduced, a small amount of rare and precious metals such as niobium, molybdenum, nickel, titanium, vanadium, and copper still need to be added to increase The manufacturing cost of grinding ball products is reduced; the second is that the microalloying technology is difficult to master, otherwise the loss of alloying elements will be large during the smelting process
The third is that most of them are quenched with oil medium, the production site has a lot of fumes, serious pollution, and there are many safety hazards

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nanometer rare earth chromium alloy cast grinding ball and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Nano rare earth chromium alloy cast grinding ball with a diameter of Ø30mm, its chemical composition is as follows:

[0046] Carbon (C): 3.2%, Silicon (Si): 1.2%, Manganese (Mn): 1.5%,

[0047] Chromium (Cr): 4.5%, Phosphorus (P): 0.08%, Sulfur (S): 0.07%,

[0048] Nano-composite rare earth powder modifier (Re): 0.15%,

[0049] Iron (Fe): 89.3%.

[0050] Its manufacturing process is as follows:

[0051] The main raw and auxiliary materials used are scrap steel, alloy and recarburizer. According to the above formula, the scrap steel is first melted in an intermediate frequency induction furnace, and the temperature is raised to 1480-1520°C, and recarburizer, chromium (Cr), silicon (Si) and manganese are added. (Mn) alloy to achieve the required chemical composition. Then insert the metal melting tube equipped with the composite rare earth nano-powder modifier into the bottom of the ladle. After the metal melting tube is melted, the composite rare-earth nano-powder is...

Embodiment 2

[0056] The chemical composition of nano rare earth chromium alloy casting grinding ball with a diameter of 60mm is as follows:

[0057] Carbon (C): 3.0%, Silicon (Si): 0.82%, Manganese (Mn): 1.2%,

[0058] Chromium (Cr): 7.1%, Phosphorus (P): 0.06%, Sulfur (S): 0.06%;

[0059] Nano-composite rare earth powder modifier (Re): 0.22%

[0060] Iron (Fe): 87.54%.

[0061] Its manufacturing process is as follows:

[0062] The main raw and auxiliary materials used are scrap steel, alloys and recarburizers. According to the above formula, the scrap steel is first melted in an intermediate frequency induction furnace, and the temperature is raised to 1470-1520°C, and chromium (Cr), silicon (Si), and manganese (Mn) alloys are added. And carburant, to achieve the required chemical composition. Then insert the metal melting tube equipped with composite rare earth nano-powder modifier into the bottom of the ladle. After the metal melting tube is melted, the nano-powder is evenly diffuse...

Embodiment 3

[0067] The chemical composition of nano-rare earth alloy cast grinding balls with a diameter of Ø90mm is as follows:

[0068] Carbon (C): 2.8%, Silicon (Si): 1.0%, Manganese (Mn): 1.2%,

[0069] Chromium (Cr): 10.5%, Phosphorus (P): 0.08%, Sulfur (S): 0.08%;

[0070] Compound rare earth modifier (Re): 0.27%,

[0071] Iron (Fe): 84.07%.

[0072] Its manufacturing process is as follows:

[0073] The main raw and auxiliary materials used are scrap steel, alloys and recarburizers. According to the above formula, the scrap steel is first melted in an intermediate frequency induction furnace, and the temperature is raised to 1480-1520°C, and chromium (Cr), silicon (Si), and manganese (Mn) alloys are added. And carburant, to achieve the required chemical composition. Then insert the metal melting tube equipped with composite rare earth nano-powder modifier into the bottom of the ladle. After the metal melting tube is melted, the nano-powder is evenly diffused into the molten iron...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Heart hardnessaaaaaaaaaa
Heart hardnessaaaaaaaaaa
Heart hardnessaaaaaaaaaa
Login to View More

Abstract

The invention relates to a nanometer rare earth chromium alloy cast grinding ball. Production of the nanometer rare earth chromium alloy cast grinding ball comprises the operation steps of steel scrap pretreatment, clean smelting, constant-temperature automatic casting, water-soluble medium quenching, low-temperature tempering, throwing aging treatment and mechanical property detection. Grains of the nanometer rare earth chromium alloy cast grinding ball are refined, the structure is compact and even, hardness HRC reaches 63 to 65, the impact energy absorption value is larger than 4 J / cm<2>, and the breakage rate is smaller than 0.2%. Composite rare earth nanometer micropowder is adopted as a modification modificator, the forming number and speed of crystal nucleuses during molten iron condensation are remarkably increased, as-cast grain refinement and structure compactness of the grinding ball are achieved, and the hardenability and obdurability of the cast ball are improved; and copolymer (PAG) quenching liquid of polyoxyethylene and polypropylene oxide is adopted, the heat treatment cost is reduced, and meanwhile the problems of environment pollution and potential safety hazards in the heat treatment production field are solved fundamentally.

Description

technical field [0001] The invention relates to a metal grinding medium widely used in powder engineering in metallurgical mines, thermal power energy, building materials, cement, engineering machinery and other industries, in particular to a nano rare earth alloy casting grinding ball and a production method thereof. Background technique [0002] As a grinding medium, cast grinding balls are widely used in powder engineering in industries such as mining metallurgy, energy thermal power, non-metal processing, building materials, cement, coal-water slurry and magnetic materials. Due to the need to meet the requirements of different equipment and different working conditions in various industries, there are many materials and heat treatment methods for grinding balls, and the diameter specifications also range from Ø6mm to Ø150mm or even larger diameters. [0003] Chromium alloy casting grinding ball is a new generation of high-efficiency grinding ball developed following forg...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C22C37/06C22C37/10C21D5/00C21D1/18C21D9/36
CPCC21D1/18C21D5/00C21D9/36C22C37/06C22C37/10Y02P10/20
Inventor 陈晓沈茂林冯继林胡朝辉刘达直俞海清储贵安倪照辉
Owner 安徽省凤形新材料科技有限公司