High-hardness hard alloy batten resistant to welding cracking and preparation method of high-hardness hard alloy batten resistant to welding cracking

A cemented carbide and high hardness technology, applied in the field of powder metallurgy, can solve problems such as cemented carbide cracking, achieve the effects of reducing the probability of cracks, improving welding reliability, and reducing stress

Active Publication Date: 2022-04-05
九江金鹭硬质合金有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, most users generally use flame brazing and gas phase brazing to weld cemented carbide strips on the carbon steel substrate for use, but the operator is required to have a high level of welding. Improper operation is prone to cracking of cemented carbide after welding. The problem

Method used

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  • High-hardness hard alloy batten resistant to welding cracking and preparation method of high-hardness hard alloy batten resistant to welding cracking
  • High-hardness hard alloy batten resistant to welding cracking and preparation method of high-hardness hard alloy batten resistant to welding cracking
  • High-hardness hard alloy batten resistant to welding cracking and preparation method of high-hardness hard alloy batten resistant to welding cracking

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Experimental program
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Effect test

Embodiment 1

[0037] A high-hardness cemented carbide strip resistant to welding cracking of the present invention is composed of the following composition, WC content 90.5wt.%, TaC content 1.5wt.%, Co content 7wt.%, TiC 0.5 N 0.5 The content is 1.0 wt.%, and the WC particle size is 1.0 μm. The thickness of the high toughness surface layer of the cemented carbide strip is 19 μm, such as figure 1 shown.

[0038] The preparation method of the high-hardness cemented carbide strip resistant to welding cracking includes the steps of batching, wet grinding, drying, forming, sintering, and heat treatment, and is characterized in that the specific steps are as follows:

[0039] (1) Ingredients and wet grinding: WC powder, Co powder, TaC powder, TiC 0.5 N 0.5 After weighing the powder according to the specified ratio, weigh 2.0wt.% PEG4000, put it into the horizontal ball mill together, add cemented carbide balls 5 times the weight of the material and industrial anhydrous alcohol with 18% of the...

Embodiment 2

[0046] A high-hardness cemented carbide strip resistant to welding cracking of the present invention is composed of the following composition: WC content 86.0wt.%, NbC content 0.5wt.%, TiC content 0.7wt.%, Co content 12wt.%, TiC 0.7 N 0.3 The content is 0.8 wt.%, and the WC particle size is 0.4 μm.

[0047] The preparation method of the high-hardness cemented carbide strip resistant to welding cracking includes the steps of batching, wet grinding, drying, forming, sintering, and heat treatment, and is characterized in that the specific steps are as follows:

[0048] (1) Ingredients and wet grinding: WC powder, Co powder, NbC powder, TiC powder, TiC powder 0.7 N 0.3 After weighing the powder according to the specified ratio, weigh 2.5wt.% PEG1500, put it into the horizontal ball mill together, add cemented carbide balls 6 times the weight of the material and industrial anhydrous alcohol with 22% of the weight of the material, and mix the wet Grind for 60 hours;

[0049] (2)...

Embodiment 3

[0055] A high-hardness cemented carbide strip that resists welding cracking according to the present invention is composed of the following composition: the WC content is 87.0wt.%, the TaNbC solid solution content is 1.5wt.%, the TiC content is 2.0wt.%, and the binder phase content is 8wt.%. %, TiC 0.3 N 0.7 The content is 1.5 wt.%, and the WC particle size is 1.5 μm.

[0056] The preparation method of the high-hardness cemented carbide strip resistant to welding cracking includes the steps of batching, wet grinding, drying, forming, sintering, and heat treatment, and is characterized in that the specific steps are as follows:

[0057] (1) Ingredients and wet grinding: WC powder, Co powder, Ni powder, TaNbC powder, TiC powder, TiC powder 0.3 N 0.7 After the powder is weighed according to the specified ratio, then weigh 2.0wt.% of paraffin, put it into the horizontal ball mill together, add cemented carbide balls 4 times the weight of the material and industrial absolute alc...

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Abstract

The invention discloses a high-hardness hard alloy batten resistant to welding cracking and a preparation method thereof.The hard alloy batten is provided with a high-toughness surface layer and a high-hardness inner layer, the binding phase content of the surface layer is 1.2 times or above that of the inner layer, the surface layer is only composed of a WC phase and a binding phase, the thickness of the surface layer is 5-100 microns, and the inner layer is composed of the WC phase, the binding phase and a cubic carbide phase; in addition, the outer surface of the batten is coated with a binding phase, and the thickness of a coating layer is 1-5 microns. The hard alloy batten is prepared from the following components: 80 to 96 weight percent of WC (Wolfram Carbide), 2.0 to 16.5 weight percent of binding phase and 0.5 to 8 weight percent of cubic carbide, wherein the average particle size of the WC is 0.1 to 6 microns. The preparation method comprises the steps of wet grinding, drying, forming, sintering and heat treatment. The batten has excellent welding crack resistance and wear resistance, and has a good application prospect in the field of metal and wood processing.

Description

technical field [0001] The invention belongs to the field of powder metallurgy, relates to a hard alloy and a preparation method thereof, in particular to a preparation method of a hard alloy lath used in the fields of metal processing and wood processing. Background technique [0002] Cemented carbide has excellent properties such as good wear resistance, high strength and toughness, sharp cutting edge, high temperature resistance, and stable chemical properties, so it is widely used in the field of cutting processing. In industry, in the field of precision machining and high-efficiency high-speed machining of metal parts, hard alloy tools with wear-resistant coatings are widely used. In the fields of low-speed processing of metals and low precision requirements, as well as the processing or cutting of non-metals such as plastics, wood, and cloth, carbide tools without wear-resistant coatings are used. In most cases, these carbide tools without wear-resistant coating are f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C29/02C22C1/05B22F3/24B22F3/10B22F3/14
Inventor 程登峰孙东平冯志刘娜娜余向阳
Owner 九江金鹭硬质合金有限公司
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