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High-hardness alloy material based on application with high contents of Cr (chromium) and Nb (niobium)

A technology of alloy materials and high hardness, which is applied in the field of high hardness alloy materials, can solve the problems of changing material hardness and wear resistance, not perfecting additional components or core technology, etc., and achieve the effect of improving wear performance

Inactive Publication Date: 2019-01-18
湖南山力泰机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Usually, high-chromium cast iron, which contains more than 11% chromium and Cr / C more than 3.5, is widely used because of its excellent wear resistance and wear resistance, and because niobium has a strong carbide formation ability, it is preferred to Fe, Mn , Cr, so when the alloy contains niobium and carbon, niobium will preferentially combine with carbon to form a compound, but how to change the hardness and wear resistance of the material itself after the compound is formed, there is no perfect additional component or core technology to achieve it

Method used

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  • High-hardness alloy material based on application with high contents of Cr (chromium) and Nb (niobium)
  • High-hardness alloy material based on application with high contents of Cr (chromium) and Nb (niobium)
  • High-hardness alloy material based on application with high contents of Cr (chromium) and Nb (niobium)

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Experimental program
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Effect test

Embodiment 1

[0020] A high-hardness alloy material based on the application of high chromium niobium, the material is composed of Cr, C, Mn, Cu, Mo, N and Nb, and the alloy is composed of the following mass fractions:

[0021]

[0022] After the heat treatment of the alloy material, its hardness reaches HRC61-66°, and the impact toughness value akv (J / cm2):>=59 (7.2) or more.

Embodiment 2

[0024] A high-hardness alloy material based on the application of high chromium niobium, the alloy is composed of the following mass fractions:

[0025]

[0026]

[0027] After the heat treatment of the alloy material, its hardness reaches HRC61-66°, and the impact toughness value akv (J / cm2):>=59 (7.2) or more.

Embodiment 3

[0029] A high-hardness alloy material based on the application of high chromium niobium, the alloy is composed of the following mass fractions:

[0030]

[0031] Or, the alloy is composed of the following mass fractions:

[0032]

[0033]

[0034] After the heat treatment of the alloy material, its hardness reaches HRC61-66°, and the impact toughness value akv (J / cm2):>=59 (7.2) or more.

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Abstract

The invention discloses a high-hardness alloy material based on application with high contents of Cr (chromium) and Nb (niobium). The high-hardness alloy material is prepared from the following components of 18% to 21% of Cr, 2.2% to 2.8% of C (carbon), 0.8% to 1% of Mn (manganese), 0.8% to 1% of Cu (copper), less than 0.3% of Mo (molybdenum), less than 0.2% of N (nitrogen), less than 0.2% of Nb,and the balance of Fe (iron). The high-hardness alloy material has the advantages that the defects of blister, crack, shrunk hole and air bubble are avoided in the casting process; after heat treatment, the hardness can reach HRC61-66 degree; the impact toughness value akv(J / cm<2>) is greater than or equal to 59(7.2), and the abrasion property of abrasive material is favorably improved.

Description

technical field [0001] The invention relates to a high hardness alloy material based on the application of high chromium niobium. Background technique [0002] Chromium metal, a silver-white metal, is extremely hard and corrosion-resistant. Density 7.20 g / cm 3 . The melting point is 1857±20°C, and the boiling point is 2672°C. Valences +2, +3 and +6. The ionization energy is 6.766 electron volts. Metallic chromium is generally characterized by surface passivation in acid. Once depassivated, it is readily soluble in almost all acids. It is oxidized by water vapor at high temperature and oxidized by carbon monoxide at 1000°C. At high temperatures, chromium reacts with nitrogen and is attacked by alkalis. Soluble in strong alkaline solution. Chromium is highly resistant to corrosion and oxidizes slowly in air, even in red heat. Insoluble in water. Plated on metal for protection. [0003] Niobium is also a metallic element. Niobium absorbs gases, is used as a degasse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/08
CPCC22C37/08
Inventor 谢志勇凌劲松石卫东
Owner 湖南山力泰机电科技有限公司