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Three-phase structured cemented carbide and preparation method thereof

A cemented carbide and phase structure technology, applied in the field of tool materials, can solve the problems of insufficient wear resistance of ordinary cemented carbide, and achieve the effects of reducing cobalt phase migration, good wear resistance, and reducing alloy pores.

Active Publication Date: 2018-01-09
武汉新锐合金工具有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of three-phase structure cemented carbide and its preparation method, and its cobalt weight percentage content is 6.5~16%, and hardness HRA is 86.0~90.8, is used for oil stud alloy, in continuous tooth Under the premise, it can solve the problem of insufficient wear resistance of ordinary cemented carbide

Method used

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  • Three-phase structured cemented carbide and preparation method thereof
  • Three-phase structured cemented carbide and preparation method thereof
  • Three-phase structured cemented carbide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0026] Example 1: three-phase structure cemented carbide—XR07F brand material and preparation method.

[0027] The grade XR07F is composed of three grades of A, B and C, and is used for the column teeth of down-the-hole drill bits for oil. Among them, grade A is used to prepare cemented carbide pellets, grade C is used to prepare fine powder of cemented carbide matrix, and grade B is used for the transition layer between the pellets and the matrix. Its composition and properties are shown in Table 1, and the weight percentage of A:B:C is 8.5:0.5:1.

[0028] According to the composition requirements of the material of grade A in Table 1, the preparation method of conventional cemented carbide is adopted: ball milling in a ball mill after batching, the ball-to-material ratio is 3.5:1, the grinding medium is alcohol, and the addition is 300L / Kg, wet Grind for 3~6h. Pass through a 300-400-mesh sieve after wet grinding, and then dry at a drying temperature of 80-95°C. After dryi...

Embodiment 2

[0033] Example 2: three-phase structure cemented carbide—XR10F brand material and preparation method.

[0034] The grade XR10F is composed of three grades D, E, and F, and is used for the teeth of roller cone bits for oil use. Among them, grade D is used to prepare cemented carbide pellets, grade F is used to prepare fine powder of cemented carbide matrix, and grade E is used for the transition layer between the pellet and the matrix. Its composition and properties are shown in Table 2, and the weight percentage of D:E:F is 8:1:1.

[0035]According to the composition requirements of the material of the D brand in Table 2, the preparation method of conventional cemented carbide is adopted: ball milling in a ball mill after batching, the ball-to-material ratio is 3.5:1, the grinding medium is alcohol, and the addition is 300L / Kg, wet Grind for 3-6h. Pass through a 300-400-mesh sieve after wet grinding, and then dry at a drying temperature of 80-95°C. After drying, it is hamme...

Embodiment 3

[0040] Example 3: three-phase structure cemented carbide—XR14F grade material and preparation method.

[0041] The XR14F grade is composed of three grades of G, H, and I, and is used for the teeth of the roller cone bit for oil. Among them, grade G is used to prepare cemented carbide pellets, grade I is used to prepare fine powder of cemented carbide matrix, and grade H is used for the transition layer between the pellet and the matrix. Its composition and performance are as shown in table 3, G:H:I weight percent is 7.0:1.5:1.5.

[0042] According to the composition requirements of the G grade material in Table 3, the preparation method of conventional cemented carbide is adopted: ball milling in a ball mill after batching, the ball-to-material ratio is 3.5:1, the grinding medium is alcohol, and the addition is 300L / Kg, wet Grind for 3-6h. Pass through a 300-400-mesh sieve after wet grinding, and then dry at a drying temperature of 80-95°C. After drying, it is hammer milled...

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Abstract

The invention provides three-phase structured cemented carbide and a preparation method thereof. The three-phase structured cemented carbide is characterized in that middle bonding phase cemented carbides are distributed on the surfaces of spherical particles of low bonding phase cemented carbides, and high bonding phase cemented carbides are distributed on the surfaces of particles of the middlebonding phase cemented carbides; the weight ratio of the low bonding phase cemented carbides is 62-85%, the weight ratio of the middle bonding phase cemented carbides is 5-18%, and the weight ratio ofthe high bonding phase cemented carbides is 10-20%; magnetic saturation of the low bonding phase cemented carbides is 145-160 emu / g, magnetic saturation of the middle bonding phase cemented carbidesis 140-155 emu / g, and magnetic saturation of the high bonding phase cemented carbides is 135-150 emu / g; drying mixing and granulating are conducted on power materials of the low bonding phase cementedcarbides and the middle bonding phase cemented carbides; then power materials of the high bonding phase cemented carbides are added for drying mixing and granulating; and the three-phase structured cemented carbide is obtained by low pressure sintering. The three-phase structured cemented carbide is used for oil cylindrical tooth alloy and is of a three-layer structure on a grain structure, and the abrasion resistance is high under the premise of continuous teeth.

Description

technical field [0001] The invention belongs to the field of tool materials, and in particular relates to a three-phase structure cemented carbide and a preparation method thereof. The three-phase structure cemented carbide of the invention is suitable for oil column teeth. Background technique [0002] The general WC-Co cemented carbide is an alloy with tungsten carbide powder as the main material and cobalt powder as the binder. The cobalt content and tungsten carbide grain size determine the hardness and toughness of the alloy. Generally, the cobalt content is low, the hardness is high, the wear resistance is high, and the toughness is low; vice versa. Under the condition of the same cobalt content, the particle size of tungsten carbide will have a certain influence on the hardness and toughness. The smaller the particle size of tungsten carbide, the higher the hardness, the higher the wear resistance, and the lower the toughness; vice versa. [0003] The toughness and ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05C22C1/10
Inventor 吴何洪刘华平刘强陆庆忠张烈华鲍立强许林
Owner 武汉新锐合金工具有限公司
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