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Removable horizontal glue removing furnace for hard alloy production

A cemented carbide and horizontal furnace technology, which is applied in the field of movable horizontal debinding furnace for cemented carbide production, which can solve the problems of large changes in carbon content of the upper and lower laminated blocks, large deviation of alloy performance, easy deformation and brittle fracture, etc. problem, to achieve uniform oxygen content and carbon content, long service life, and reduce the effect of wiring devices

Inactive Publication Date: 2012-04-11
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the long heating zone of the vertical debinding furnace, the heat is emitted from bottom to top, resulting in a large temperature difference in the furnace. In addition, hydrogen is introduced from the bottom. Due to the temperature difference, the hydrogen flow rate at the bottom is faster, resulting in changes in the carbon content of the upper and lower laminated blocks. Large, so that the performance of the alloy has a large deviation, and the pass rate is not high
The horizontal debinding furnace adopts blower to blow air, and the resistance wire is cooled rapidly in a short period of time, which is easy to deform and brittle, and has a short service life.

Method used

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  • Removable horizontal glue removing furnace for hard alloy production
  • Removable horizontal glue removing furnace for hard alloy production
  • Removable horizontal glue removing furnace for hard alloy production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Carbon and oxygen content of compact after debinding

[0015] Table 1 and Table 2 are the carbon and oxygen analysis results of the YJG8C brand compact after debinding by the air-cooled horizontal debinding furnace and the movable horizontal debinding furnace respectively.

[0016] It can be seen from Table 1 and Table 2 that after debinding by the movable horizontal debinding furnace, the range of carbon content of each boat compact is small, and the oxygen content is low, which is mainly due to the use of the movable horizontal debinding furnace. There are six temperature control zones, so that the temperature difference between the upper and lower parts of each group of green compacts is small. In addition, when the hydrogen gas is passed into the furnace, small hole pipes and filter plates 11 are used to divert the flow, so that the hydrogen gas can pass through the surface of each green compact evenly, ensuring The rubber is completely discharged, so tha...

Embodiment 2

[0021] The physical and mechanical properties of the alloy after embodiment 2 vacuum sintering

[0022] Table 3 and Table 4 respectively show the physical and mechanical properties of the compact after debinding in the air-cooled horizontal debinding furnace and the movable horizontal debinding furnace, and the alloy after vacuum sintering.

[0023] Since the total carbon content and oxygen content of the green compact are well controlled during debinding by the movable horizontal debinding furnace, the properties of the sintered alloy are better.

[0024] Table 3 Physical and mechanical properties of YG8C alloy after air-cooled furnace discharge and vacuum sintering

[0025]

[0026] Table 4 Physical and mechanical properties of YG8C alloy after movable grate glue and vacuum sintering

[0027]

Embodiment 3

[0028] Embodiment 3 Stove structure characteristic comparison

[0029] It can be seen from the introduction of the above-mentioned equipment structure that the new furnace type can naturally cool the furnace chamber loaded with green compacts by sealing the resistance wire connection device, increasing the heat preservation effect of the furnace, and adopting a mobile heating device. At the same time, the blasting of the blower during air cooling is omitted, so the required electric energy for cooling decreases. Therefore, when the amount of deglue compacted is the same, the design power of the new furnace type is reduced from the original 50kW to 36kW, which can save energy by about 20%. In addition, when the air-cooled debinding furnace is cooled by a blower, the resistance wire is cooled rapidly in a short period of time, the resistance wire is easily deformed and brittle, and the service life is short; while the new furnace type will move the heating device installed with ...

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Abstract

The invention discloses a removable horizontal glue removing furnace for hard alloy production. One end of a furnace cradle (9) is fixedly provided a horizontal furnace tube (2); a furnace door (1), a hydrogen feeding tube (13) and a hydrogen discharging tube (3) are arranged on the horizontal furnace tube (2); a guide rail (10) is arranged on the furnace cradle (9); a horizontal furnace hearth (8) and a heat-insulating material (5) are arranged on a furnace body (4); an electric heating element is arranged in the horizontal furnace hearth (8); rollers (7) are arranged at the bottom of the furnace body (4); the furnace body (4) is arranged on a guide rail (10) through the rollers (7) and can move back and forth; and by moving the furnace body (4) back and forth on the guide rail (10), the horizontal furnace tube (2) is made to enter the horizontal furnace hearth (8) or be separated from the horizontal furnace hearth (8). The removable horizontal glue removing furnace for the hard alloy production in the invention is used for removing a forming agent, can be used for ensuring the uniformity in oxygen content and carbon content inside and outside as well as on the upper part and the lower part of a green compact, and has a long service life.

Description

technical field [0001] The invention relates to a debinding furnace, in particular to a movable horizontal debinding furnace for cemented carbide production for removing forming agents in the production of cemented carbide. Background technique [0002] The effect of glue removal before cemented carbide sintering greatly affects the quality of cemented carbide. At present, there are two types of equipment for removing molding agents, one is a vertical debinding furnace, and the other is a horizontal debinding furnace. Due to the long heating zone of the vertical debinding furnace, the heat is emitted from bottom to top, which makes the temperature difference in the furnace larger. In addition, the hydrogen gas is introduced from the bottom. Due to the temperature difference, the hydrogen flow rate at the bottom is faster, resulting in changes in the carbon content of the upper and lower laminated blocks. Large, so that the performance of the alloy has a large deviation, and...

Claims

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Application Information

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IPC IPC(8): F27B3/06F27B3/20F27B3/10F27B3/12
Inventor 周建华
Owner CENT SOUTH UNIV
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