Wear-resistant cast steel and preparation method thereof

A technology of cast steel and raw materials, which is applied in the field of wear-resistant cast steel and its preparation, can solve the problems of poor wear resistance, low production efficiency, and low coal throughput, achieve excellent strength and toughness coordination, reduce production costs, and improve overall performance Effect

Inactive Publication Date: 2019-10-25
山东能源重装集团乾泰精密机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] As the key link in the manufacture of scraper conveyors, the middle trough is now mostly used to weld multiple parts such as channel side steel and middle plate into components. Problems such as low coal volume and low production efficiency
[0004] At present, commonly used wear-resistant materials include high-manganese steel, high-chromium cast iron and non-manganese wear-resistant cast steel. High-manganese steel has high toughness, but poor wear resistance; high-chromium cast iron has good wear resistance but low t

Method used

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  • Wear-resistant cast steel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A wear-resistant cast steel, comprising the following raw materials in mass percentage: C 0.26%, Cr 1.0%, Si 0.2%, Mn 1.0%, B 0.005%, S 0.019%, P 0.017%, Mo 0.2%, Ni 1.0% , rare earth 0.03%, and the balance is Fe.

[0041] Follow the steps below:

[0042] 1. Raw material smelting: put the raw material in an intermediate frequency induction furnace for smelting, the melting temperature is 1620°C, and keep for 5 minutes;

[0043] 2. Ladle: Ladle the melted raw materials, and add 0.1% aluminum alloy to the bottom of the ladle;

[0044] 3. Pouring molding: in step 2, the temperature of the mixture in the ladle is lowered to 1580°C, and then casting is performed to obtain a casting;

[0045] 4. Heat treatment:

[0046] Perform pretreatment on the castings obtained in step 3, the temperature is 800 ° C, air cooling after 4 hours of heat preservation, the casting quenching heating temperature is 900 ° C, oil quenching after 4 hours of heat preservation, tempering at 350 ° C...

Embodiment 2

[0048] A wear-resistant cast steel, comprising the following raw materials in mass percentage: C 0.33%, Cr 1.3%, Si 0.5%, Mn 1.3%, B 0.006%, S 0.035%, P 0.035%, Mo 0.3%, Ni 1.5% , Rare earth 0.06%, the balance is Fe.

[0049] Follow the steps below:

[0050] 1. Raw material smelting: put the raw material in an intermediate frequency induction furnace for smelting, the temperature of the smelting raw material is 1635°C, and keep for 7.5 minutes;

[0051] 2. Ladle: Ladle the melted raw materials, and add 0.15% aluminum alloy to the bottom of the ladle;

[0052] 3. Pouring molding: in step 2, the temperature of the mixture in the ladle is lowered to 1590°C for pouring and molding to obtain a casting;

[0053] 4. Heat treatment:

[0054]Perform pretreatment on the castings obtained in step 3, the temperature is 850 ° C, air cooling after 5 hours of heat preservation, the casting quenching heating temperature is 950 ° C, oil quenching after 5 hours of heat preservation, temperin...

Embodiment 3

[0056] A wear-resistant cast steel, comprising the following raw materials in mass percentage: C 0.29%, Cr 1.19%, Si 0.45%, Mn 1.18%, B 0.001%, S 0.001%, P 0.005%, Mo 0.27%, Ni 1.25% , Rare earth 0.045%, the balance is Fe.

[0057] Follow the steps below:

[0058] 1: Raw material smelting: put the raw material in an intermediate frequency induction furnace for smelting, the temperature of the smelting raw material is 1650°C, and keep it for 10 minutes;

[0059] Two: ladle: pour the molten raw material into a ladle, and add 0.3% aluminum alloy to the bottom of the ladle;

[0060] Three: Pouring molding: In step 2, the temperature of the mixture in the ladle is lowered to 1600°C for pouring and molding to obtain a casting;

[0061] Four: heat treatment:

[0062] Perform pretreatment on the castings obtained in step 3, the temperature is 900 ° C, air cooling after 6 hours of heat preservation, the casting quenching heating temperature is 1000 ° C, oil quenching after 6 hours o...

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Abstract

The invention discloses a wear-resistant cast steel and a preparation method thereof, and belongs to the technical field of casting. The method comprises the steps of feeding raw materials into an intermediate-frequency induction furnace for smelting under the temperature of 1620-1650 DEG C; maintaining for 5-10min; casting the smelted raw materials into a ladle; adding 0.1-0.3% of aluminum alloyfrom the bottom of the ladle; decreasing the temperature of a mixture to be subjected to ladle casting to be 1580-1600 DEG C; casting and forming to obtain a cast; preprocessing the cast under the temperature of 800-900 DEG C; maintaining the temperature for 4-6h; then cooling by air; quenching the cast, and heating until the temperature reaches 900-1000 DEG C; maintaining the temperature for 4-6h; then quenching by oil; annealing under the temperature of 350 DEG C; maintaining the temperature for 6-8h; and cooling by air until room temperature is reached, thus obtaining the wear-resistant cast steel. The cast steel prepared by the method is outstanding in toughness and wear resistance, and low in cost.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a wear-resistant cast steel and a preparation method thereof. Background technique [0002] China's foundry wear-resistant material industry with steel wear-resistant materials as the core has developed rapidly for decades. Steel wear-resistant material products with the goal of saving materials and reducing consumption are widely used in metallurgy, building materials, electric power, construction, machinery, national defense, ships , Railway, coal, chemical and petrochemical industries currently consume more than 3.5 million tons of steel wear-resistant material castings in domestic abrasive wear conditions. China's foundry wear-resistant material industry has made important contributions to my country's economic construction and social development. [0003] As the key link in the manufacture of scraper conveyors, the middle trough is now mostly used to weld multiple...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C38/44C22C38/04C22C38/02C22C33/04C21C7/06C21C7/00C21D1/18
CPCC21C7/0075C21C7/06C21D1/18C22C33/04C22C38/002C22C38/005C22C38/02C22C38/04C22C38/44C22C38/54
Inventor 张凯高菲李洋邸莉莉李强周颖孙锐锐吕良王永刚
Owner 山东能源重装集团乾泰精密机械有限公司
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