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A kind of high chromium wear-resistant casting and its preparation process

A preparation process and casting technology, which is applied in the field of high chromium wear-resistant castings and its preparation process, can solve the problems of low composite strength of wear-resistant castings, wear failure of castings, and short service life, and achieve high economic value and social benefits. Extended service life, long service life effect

Active Publication Date: 2017-12-29
安徽中建材开源新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the composite strength of wear-resistant castings is not high. Under the condition of friction and wear, especially in the case of impact friction and wear, the castings are prone to cracking and peeling of the surface layer, which will cause the castings to wear out and have a short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A high chromium wear-resistant casting, comprising the following substances in parts by weight: C 2.65%, Mn 0.5%, Mo 2.3%, Cr 19.52%, Si 0.76%, Ni 1.38%, Al 0.23%.

[0019] The preparation process of the high chromium wear-resistant casting comprises the following steps:

[0020] (1) Smelting: Add pig iron, scrap steel, ferromolybdenum, ferronickel, and high-carbon ferromanganese into an intermediate frequency induction furnace, heat and melt, and after it is completely melted, add roasted red ferrochromium, and heat up to 1480 when all the furnace materials are melted. ℃, then add low-carbon ferromanganese, ferrosilicon and aluminum for precipitation deoxidation, adjust the composition, and after complete melting, add TiC and Fe into the molten iron 3 Al, place for 5-8min;

[0021] (2), injection molding: cooling the molten iron in step (1) to 1380°C, pouring it into the mold, knocking the mold for a period of time, cooling to 230°C, breaking the shell, and then cooli...

Embodiment 2

[0025] A high chromium wear-resistant casting, comprising the following substances in parts by weight: C 2.8%, Mn 1.64%, Mo 2.56%, Cr 18.6%, Si 0.87%, Ni 1.25%, Al 0.17%.

[0026] The preparation process of the high chromium wear-resistant casting comprises the following steps:

[0027] (1) Smelting: Add pig iron, scrap steel, ferromolybdenum, ferronickel, and high-carbon ferromanganese into an intermediate frequency induction furnace, heat and melt, and after it is completely melted, add roasted red ferrochromium, and heat up to 1480 when all the furnace materials are melted. ℃, then add low-carbon ferromanganese, ferrosilicon and aluminum for precipitation deoxidation, adjust the composition, and add Cr to the molten iron after it is completely melted 3 C 2 , WC, place for 5-8min;

[0028] (2), injection molding: cooling the molten iron in step (1) to 1380°C, pouring it into the mold, knocking the mold for a period of time, cooling to 230°C, breaking the shell, and then co...

Embodiment 3

[0032] A high chromium wear-resistant casting, comprising the following substances in parts by weight: C 1.85%, Mn 2.2%, Mo 2.2%, Cr 16.3%, Si 1.28%, Ni 1.63%, Al 0.28%.

[0033] The preparation process of the high chromium wear-resistant casting comprises the following steps:

[0034] (1) Smelting: Add pig iron, scrap steel, ferromolybdenum, ferronickel, and high-carbon ferromanganese into an intermediate frequency induction furnace, heat and melt, and after it is completely melted, add roasted red ferrochromium, and heat up to 1480 when all the furnace materials are melted. ℃, then add low-carbon ferromanganese, ferrosilicon and aluminum for precipitation deoxidation, adjust the composition, and add Cr to the molten iron after it is completely melted 3 C 2 , TiC, place for 5-8min;

[0035] (2), injection molding: cooling the molten iron in step (1) to 1380°C, pouring it into the mold, knocking the mold for a period of time, cooling to 230°C, breaking the shell, and then co...

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Abstract

The invention discloses a high-chromium abrasion-resistant casting and a preparation process thereof. The high-chromium abrasion-resistant casting comprises, by weight, 1.6%-2.8% of C, 0.5%-2.2% of Mn, 2.2%-2.6% of Mo, 15.2%-19.52% of Cr, 0.76%-1.34% of Si, 1.25%-1.63% of Ni and 0.15%-0.28% of Al. The high-chromium abrasion-resistant casting is high in hardness and strength, excellent in abrasion resistance and impact resistance, long in service life and very high in economic value and social benefit.

Description

technical field [0001] The invention relates to the technical field of wear-resistant materials, in particular to a high-chromium wear-resistant casting and a preparation process thereof. Background technique [0002] Wear-resistant castings are a new type of abrasive material. They play an increasingly important role in building materials and mining industries. China's cement building materials and mining industries have a huge demand. According to statistics, the demand for wear-resistant castings from 2006 to 2010 increased from 850,000 tons increased to 1.5 million tons. Due to the excellent wear resistance of high chromium cast iron, most of the wear-resistant workpieces are currently manufactured with high chromium cast iron materials. However, the composite strength of wear-resistant castings is not high. Under the condition of friction and wear, especially in the case of impact friction and wear, the castings are prone to cracking and peeling of the surface layer, r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C22C33/08C09D183/04C09D7/12
CPCC08K3/04C08K3/34C08K3/346C08K3/36C08K7/06C09D7/61C09D7/70C09D183/04C22C33/08C22C37/08C22C37/10
Inventor 汪德发徐超汤新明翟建徐光清赵文定
Owner 安徽中建材开源新材料科技有限公司
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