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High-carbon and high-boron wear resistant steel for impeller

A wear-resistant steel and high-carbon technology, applied in the field of impeller materials, can solve the problems of insufficient heat treatment process, increased production cost of wear-resistant steel, insufficient hardenability of wear-resistant steel, etc., achieve composition and heat treatment process optimization, and improve performance Uniformity, the effect of improving the tempering effect

Active Publication Date: 2014-10-15
宁国东方碾磨材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Wear-resistant steel needs to have higher hardness. Therefore, in the prior art, wear-resistant steel generally has a high alloy content. Although it can meet the hardness requirements, it has relatively poor plasticity and toughness. Grinding steel has defects such as insufficient hardenability and uneven hardness, so it is often necessary to add precious metals to improve hardenability, thus increasing the production cost of wear-resistant steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare as follows:

[0021] S1: Weighing each raw material according to the mass fraction, casting and molding after smelting to obtain a wear-resistant steel semi-finished product;

[0022] S2: Put the wear-resistant steel semi-finished product obtained in S1 into the furnace and heat it up to 280°C for 120 minutes, heat it up to 650°C for 240 minutes, heat it up to 1050°C for 210 minutes, and perform oil quenching in quenching oil with an oil temperature of 120°C , the quenching time is 14min. After oil quenching, put it into the holding furnace at a heating rate of 50℃ / h from 30℃ to 380℃ for 480min, then slowly cool down to room temperature for 480min to obtain wear-resistant steel.

Embodiment 2

[0024] Prepare as follows:

[0025] S1: Weighing each raw material according to the mass fraction, casting and molding after smelting to obtain a wear-resistant steel semi-finished product;

[0026] S2: Put the wear-resistant steel semi-finished product obtained in S1 into the furnace and heat it up to 290°C for 115 minutes, heat it up to 640°C for 250 minutes, heat it up to 1100°C for 200 minutes, and then perform oil quenching in quenching oil with an oil temperature of 110°C , the quenching time is 15min. After oil quenching, put it into the holding furnace at a rate of 100℃ / h from room temperature to 375℃ for 490min, then slowly cool down to room temperature for 470min to obtain wear-resistant steel.

Embodiment 3

[0028] Prepare as follows:

[0029] S1: Weighing each raw material according to the mass fraction, casting and molding after smelting to obtain a wear-resistant steel semi-finished product;

[0030] S2: Put the wear-resistant steel semi-finished product obtained in S1 into the furnace and heat it up to 270°C for 125 minutes, heat it up to 670°C for 230 minutes, heat it up to 1000°C for 220 minutes, and then perform oil quenching in quenching oil with an oil temperature of 130°C , the quenching time is 12min. After oil quenching, put it into the holding furnace at a heating rate of 20℃ / h from 100℃ to 385℃ for 470min, then slowly cool down to room temperature for 490min to obtain wear-resistant steel.

[0031] In Examples 1-3, various properties of the prepared wear-resistant steel were tested, and the performance data are shown in Table 2.

[0032]

[0033] The data in the above table 2 shows that the wear-resistant steel disclosed in the present invention has good...

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PUM

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Abstract

The invention discloses high-carbon and high-boron wear resistant steel for an impeller. The wear resistant steel comprises the following components in percentage by mass: 0.65-1.0% of C, 0 / 3-0.8% of Si, 1.0-1.5% of Mn, 1.0-2.0% of Cr, 0.4-0.8% of B, 0-0.04% of P, 0-0.04% of S, 0.05-0.2% of Ti, and the balance of Fe. The wear resistant steel is prepared by the following steps: (S1) all raw materials are weighed by the mass percentages, and are cast to form after being smelted to obtain a semi-finished wear resistant steel; (S2) the semi-finished wear resistant steel obtained in the step (S1) is put in a furnace to heat up to the temperature of 270-290 DEG C; after the temperature of 270-290 DEG C is kept for 115-125 min, the temperature is increased to the temperature of 640-670 DEG C; after the temperature of 640-670 DEG C is kept for 230-250 min, the temperature is increased to the temperature of 1000-1100 DEG C; after the temperature of 1000-1100 DEG C is kept for 200-220 min, the oil quenching is performed in quenching oil with the oil temperature of 110-130 DEG C; the quenching time is 12-15 min; the temperature from the room temperature to 100 DEG C is increased to the temperature of 375-385 DEG C by the heating speed of 20-100 DEG C / h in a heat insulating furnace after the oil quenching; after the temperature of 375-385 DEG C is kept for 470-490 min, the temperature is slowly decreased to the room temperature by 470-490 min; and then, the wear resistant steel is obtained. The wear resistant steel has good comprehensive performance.

Description

technical field [0001] The invention relates to the technical field of impeller materials, in particular to a high-carbon, high-boron wear-resistant steel for an impeller. Background technique [0002] Wear-resistant steel is widely used in mechanical products that require high strength and high wear resistance due to extremely harsh working conditions. In the field of coal rod extrusion machines, wear-resistant steel is widely used for the manufacture of impellers. Wear-resistant steel needs to have higher hardness. Therefore, in the prior art, wear-resistant steel generally has a high alloy content. Although it can meet the hardness requirements, its plasticity and toughness are relatively poor. Grinding steel has defects such as insufficient hardenability and uneven hardness, so it is often necessary to add precious metals to improve hardenability, thus increasing the production cost of wear-resistant steel. Therefore, improvements are needed to improve the comprehensiv...

Claims

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Application Information

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IPC IPC(8): C22C38/32C21D1/18C21D6/00
Inventor 赵金斌杨霄葛兴洋
Owner 宁国东方碾磨材料股份有限公司
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