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High-alloy wear-resisting casting iron and thermal treatment process thereof

A wear-resistant cast iron and heat treatment furnace technology, which is applied in the field of cast iron alloys, can solve the problems of high cost, reduced wear resistance, general toughness, etc., and achieve enhanced hardness and toughness, improved oxidation resistance, and improved wear resistance. Effect

Inactive Publication Date: 2010-07-14
HUNAN XINGLIANG WEAR RESISTANT NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cast iron with good wear resistance, good toughness, and no obvious change in wear resistance after repeated repairs, aiming at the deficiencies of the existing wear-resistant cast iron, such as high cost, general toughness, and reduced wear resistance after repairs. High alloy wear-resistant cast iron, the cost of the wear-resistant cast iron is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] According to the existing smelting technology, the mass percentage content of each chemical composition of high alloy wear-resistant cast iron adopts: C2.6%; Cr14.5%; Mn 3.57%; Al 0.33%; Si 0.8%; P≤0.05%; S≤0.03 %, the rest is iron.

[0023] The production process of high-alloy wear-resistant cast iron is: batching—smelting—adjusting composition—adding modifier—baking—casting—heat treatment. The heat treatment process of the present invention is as follows: put the workpiece to be treated into a heat treatment furnace at room temperature and slowly raise the temperature, keep it at 200°C, 360°C, 520°C, 640°C, and 900°C for 2 hours, and heat it at the quenching temperature of 1040-1060°C 12min, air-cooled to room temperature. Except heat treatment process, other steps are all according to conventional technology. The mechanical properties after heat treatment are: hardness is HRC64, impact toughness is 13.2J / cm 2 . The use of the user Guizhou Huaxi Bolin Steel Pipe M...

Embodiment 2

[0025] According to the existing smelting technology, the mass percentage content of each chemical composition of high alloy wear-resistant cast iron adopts: C2.5%; Cr 13.5%; Mn3.35%; Al 0.33%; Si 0.6%; P≤0.05%; S≤0.03 %, the rest is iron.

[0026] The smelting process and heat treatment process are the same as in Example 1, and the mechanical properties after heat treatment are: the hardness is HRC63, and the impact toughness is 14J / cm 2 . The use of the user Xuzhou Guanghuan Steel Tube Co., Ltd. shows that the extrusion roller made of the material of the present invention has high hardness, strong wear resistance, no change in hardness after wear and repair, no sticking steel phenomenon in the production process, and the service life is SKD11 (3Cr2W8V) extrusion More than 2.5 times of the pressure roller.

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Abstract

The invention discloses high-alloy wear-resisting casting iron containing the following chemical compositions by weight percent: 2.4-2.8 percent of C, 10-18 percent of Cr, 3.0-4.0 percent of Mn, 0.3-0.4 percent of Al, 0.5-1.0 percent of Si, not more than 0.05 percent of P, not more than 0.03 percent of S and the balance of Fe. A thermal treatment process provided by the invention comprises the following steps of: filling workpieces required to be processed in a thermal treatment furnace at the room temperature and slowly heating; respectively preserving heat for 2h at the temperatures of 200 DEG C, 360 DEG C, 520 DEG C, 640 DEG C and 900 DEG; preserving the heat for 5-15 min until the quenching temperature is 1040-1060 DEG C when heating; and air cooling to the room temperature. The high-alloy wear-resisting casting iron greatly saves the production cost while ensuring the product performance and can be widely applied to manufacturing various wear-resisting products in mining industry, steel mill industry, power plant industry, steel tubing plant industry, ship building industry and the like.

Description

technical field [0001] The invention belongs to the technical field of cast iron alloys, and in particular relates to a high-alloy wear-resistant cast iron and a heat treatment process thereof. Background technique [0002] At present, the commonly used metal wear-resistant materials mainly include high-manganese steel, low-alloy steel and high-Cr wear-resistant cast iron. Among them, high-manganese steel has good impact toughness, but relatively poor wear resistance; low-alloy steel such as Cr-Mo steel, Cr-Mn-Si-Mo steel has good comprehensive performance, but it is not suitable for strong abrasive wear occasions; high Cr wear-resistant cast iron is relatively widely used, and its hardness after quenching is very high, which can be used for strong wear-resistant occasions, but its impact toughness is relatively low. weaker. [0003] The patent document whose application number is 98112329.5 discloses a chromium-silicon-tungsten wear-resistant cast iron, its chemical compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C21D5/00
Inventor 刘绍君
Owner HUNAN XINGLIANG WEAR RESISTANT NEW MATERIAL
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