Airway structure in hearth of hard alloy and metal ceramic debinding furnace

A cermet and cemented carbide technology, which is applied in the fields of mechanical processing and powder metallurgy, can solve problems such as unstable properties of cermet substrates, and achieve the effects of uniform carrier gas flow distribution, uniform cooling effect, and cost savings

Active Publication Date: 2019-01-01
湖北麦拓新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a hard alloy and cermet degreasing furnace inner gas passage structure, which can ensure the uniformity of carbon

Method used

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  • Airway structure in hearth of hard alloy and metal ceramic debinding furnace
  • Airway structure in hearth of hard alloy and metal ceramic debinding furnace
  • Airway structure in hearth of hard alloy and metal ceramic debinding furnace

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] like Figure 1-7 Among them, a hard alloy and cermet degreasing furnace inner gas passage structure, including an air inlet pipe 11, the air inlet pipe 11 is arranged on the bottom tail end of the furnace hearth 1 upwardly, and the upper end of the air inlet pipe 11 located in the furnace hearth 1 is provided with a first One air guide pipe 2, the second air guide pipe 3 and the third air guide pipe 4, the intake pipe 11 part located in the furnace 1 is provided with a fourth air guide pipe 5 near the bottom of the furnace 1, and the product is placed in the sintering work during degreasing and sintering On the graphite boat layer 10 in the area;

[0029] The first air guide pipe 2, the second air guide pipe 3, the third air guide pipe 4 and the fourth air guide pipe 5 are arranged horizontally along the axial direction of the furnace 1, and the first air guide pipe 2 and the third air guide pipe 4 are respectively arranged on On both sides above the graphite boat laye...

Embodiment 2

[0037] On the basis of Example 1, the carrier gas pressure difference in the first air guide tube 2, the second air guide tube 3, the third air guide tube 4 and the fourth air guide tube 5 is 3-4bar, and the carrier gas filling pressure is 0.3- 0.4bar, the carrier gas pressure in the furnace 1 is maintained at 50-300Pa.

Embodiment 3

[0039] On the basis of Example 1, the exhaust holes 6 of the first air duct and the exhaust holes 8 of the third air duct are set at 25°-30° to the vertical direction, preferably 25°.

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PUM

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Abstract

The invention relates to an airway structure in a hearth of a hard alloy and metal ceramic debinding furnace. The airway structure comprises an air inlet pipe, wherein the air inlet pipe passes through the tail end of the bottom of the hearth upwards, a first air guide pipe, a second air guide pipe and a third air guide pipe are arranged on the upper end of the air inlet pipe located in the hearth, and a fourth air guide pipe is arranged in a position, which is close to the bottom of the hearth, of the air inlet pipe located in the hearth; the first air guide pipe, the second air guide pipe, the third air guide pipe and the fourth air guide pipe are horizontally arranged in the axial direction of the hearth, the first air guide pipe and the third air guide pipe are respectively arranged onboth sides above a sintering area, the second air guide pipe is arranged just above the sintering area, and the fourth air guide pipe is arranged just below the sintering area. By adopting the structure, the uniformity of the carbon content and the volume shrinkage and weight loss rate of products in a debinding process can be guaranteed, and the problem of unstable performance of the matrix of current domestic metal ceramic products is solved.

Description

technical field [0001] The invention relates to the fields of mechanical processing and powder metallurgy, in particular to an air channel structure in a hearth of a hard alloy and cermet degreasing furnace. Background technique [0002] Ti(C,N)-based cermet tools have attracted widespread attention at home and abroad because of their high hardness, wear resistance, red hardness, excellent chemical stability and extremely low friction coefficient. They are mainly used in steel and cast iron. High-speed finishing. Ti(C,N)-based cermets have shown great potential as an upgraded alternative to traditional WC-Co cemented carbides. Its high-temperature hardness is better than that of high-speed steel and WC-based cemented carbide, and its toughness is better than that of ceramic and superhard material tools. It also just fills the gap between WC-based cemented carbide tools and ceramic tools in the processing range. [0003] In recent years, relevant departments in our country ...

Claims

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Application Information

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IPC IPC(8): B22F3/10
CPCB22F3/003B22F3/1021
Inventor 石增敏张大勇余永言娄航宇
Owner 湖北麦拓新材料科技股份有限公司
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