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Subzero treatment technology for hard alloy saw blade tool bit

A cemented carbide and cryogenic treatment technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems such as unlikely and immature processes

Inactive Publication Date: 2011-08-17
HEBEI SINGSHUO SAW
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The first method is actually unlikely, and the second method has no mature technology

Method used

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  • Subzero treatment technology for hard alloy saw blade tool bit
  • Subzero treatment technology for hard alloy saw blade tool bit
  • Subzero treatment technology for hard alloy saw blade tool bit

Examples

Experimental program
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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] The cemented carbide cutter bit involved in the following embodiments is the KCR06 brand.

[0017] see figure 1 , the cryogenic treatment process of the cemented carbide cutter head of the KCR06 brand is: from room temperature 20°C, with a cooling rate of 2°C per minute, the temperature of the cutter head is dropped to -120°C ~ -160°C, in a cryogenic state Keep warm for 120 minutes to 300 minutes, then return to room temperature in the air. After reaching room temperature, perform low temperature tempering. The hardness is 93.5-95.1HRA, and the bending strength is 2300-2500MPa.

[0018] The following table is the specific parameters and hardness, bending strength performance table of each implementation example:

[0019]

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PUM

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Abstract

The invention relates to a production technology for a hard alloy saw blade tool bit, and in particular relates to a subzero treatment technology for a hard alloy saw blade tool bit. The subzero treatment technology comprises the following steps: directly cooling the hard alloy tool bit to be under the subzero state below -120DEG C from the room temperature within 50-70 minutes at the cooling speed of 2-4DEG C / minute; under the subzero state, keeping the temperature for120-600 minutes; taking out the hard alloy tool bit, and cooling the hard alloy tool bit to the room temperature in the air; directly heating to 200-300DEG C for tempering from the room temperature within 50-70 minutes at the warming speed of 2-4DEG C / minute; at the tempering temperature of 200-300DEG C, keeping the temperature for 120-300 minutes; and taking out the hard alloy tool bit and cooling the hard alloy tool bit in the air to the room temperature. According to the subzero treatment technology, the residual austenite amount in the hard alloy is effectively reduced, the possibility of generating residual stress can be lowered, and the intensity, the impact toughness and the abrasive resistance of the hard alloy tool bit can be improved.

Description

[0001] technical field [0002] The invention relates to a production process of a hard alloy saw blade, in particular to a cryogenic treatment process of a hard alloy saw blade head. Background technique [0003] In the traditional manufacturing process of cemented carbide circular saw blades, the cemented carbide cutter head is fixed on the saw blade substrate by brazing connection, and the part engaged in cutting work is the cemented carbide cutter head part, so the strength of the cutter head, Toughness and wear resistance determine the service life of carbide saw blades. In the process of pressing and sintering the cemented carbide cutter head, the cooling process after high-temperature sintering of WC, TiC and bonding metal will inevitably cause the structure to be in a state of stress, and the existence of residual stress in these cemented carbides will not only reduce The strength of the cemented carbide cutter head, and in the later use process, due to the inductio...

Claims

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Application Information

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IPC IPC(8): C21D6/04C21D9/24
Inventor 陈志兴杜长江赵生林
Owner HEBEI SINGSHUO SAW
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