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A Method for Reducing Bending Rate of Hard Alloy Short Rods

A cemented carbide and bending rate technology, applied in the field of cemented carbide sintering processing, can solve problems such as workpiece scrapping, and achieve the effects of reducing bending rate, improving quality and yield

Inactive Publication Date: 2017-02-15
DONGGUAN UNIV OF TECH +8
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In addition, for cemented carbide, it generally includes refractory metal compounds and bonding metals, such as cobalt and nickel; in the cemented carbide processing industry, as an important sintering equipment, vacuum carbon tube sintering Furnaces are widely used; for cemented carbide, in the actual sintering process, the cemented carbide workpiece is easily bonded to the graphite boat used to hold the workpiece, which will cause the workpiece to be scrapped

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1, a method for reducing the bending rate of cemented carbide short rods includes the following process steps, specifically:

[0032] a. Putting the cemented carbide raw materials mixed uniformly and mixed with glue into the extruder, and the extruder prepares a round cemented carbide bar blank through a forming die;

[0033] b. Place the cemented carbide round bar blank in a degummed loading graphite boat and dry it naturally in a ventilated environment; wherein, the degummed loaded graphite boat is in the shape of a rectangular thin plate, and the upper surface of the degummed loaded graphite boat is opened There is a V-shaped groove that extends along the length of the degummed loaded graphite boat and has a V-shaped cross section. The lower surface of the degummed loaded graphite boat is a smooth structure. The length of the degummed loaded graphite boat is 1000mm-1200mm, hard alloy The round bar blank is placed in the V-shaped groove of the degummed load...

Embodiment 2

[0050] Embodiment 2, a method for reducing the bending rate of cemented carbide short rods, includes the following process steps, specifically:

[0051] a. Putting the cemented carbide raw materials mixed uniformly and mixed with glue into the extruder, and the extruder prepares a round cemented carbide bar blank through a forming die;

[0052] b. Place the cemented carbide round bar blank in a degummed loading graphite boat and dry it naturally in a ventilated environment; wherein, the degummed loaded graphite boat is in the shape of a rectangular thin plate, and the upper surface of the degummed loaded graphite boat is opened There is a V-shaped groove that extends along the length of the degummed loaded graphite boat and has a V-shaped cross section. The lower surface of the degummed loaded graphite boat is a smooth structure. The length of the degummed loaded graphite boat is 1000mm-1200mm, hard alloy The round bar blank is placed in the V-shaped groove of the degummed loa...

Embodiment 3

[0069] Embodiment 3, a method for reducing the bending rate of a short hard alloy rod includes the following process steps, specifically:

[0070] a. Putting the cemented carbide raw materials mixed uniformly and mixed with glue into the extruder, and the extruder prepares a round cemented carbide bar blank through a forming die;

[0071] b. Place the cemented carbide round bar blank in a degummed loading graphite boat and dry it naturally in a ventilated environment; wherein, the degummed loaded graphite boat is in the shape of a rectangular thin plate, and the upper surface of the degummed loaded graphite boat is opened There is a V-shaped groove that extends along the length of the degummed loaded graphite boat and has a V-shaped cross section. The lower surface of the degummed loaded graphite boat is a smooth structure. The length of the degummed loaded graphite boat is 1000mm-1200mm, hard alloy The round bar blank is placed in the V-shaped groove of the degummed loading g...

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Abstract

The invention discloses a method for reducing the bending rate of hard alloy short bar materials. The method comprises the following process steps that a, pressing is carried out; b, blank natural drying is carried out; c, degumming is carried out; d, blanks contained by a graphite boat container are placed into a vacuum sintering furnace, and the vacuum pumping processing is carried out after a furnace door is closed; e, vacuum primary sintering is carried out; f, the blanks are cooled to room temperature along with the furnace; g, anti-sticky paint coats the surfaces of a cover plate V-shaped groove of a graphite cover plate and the surface of a bottom plate V-shaped groove of a graphite bottom plate; h, the anti-sticky paint is naturally dried; I, the blanks are contained in a sintering containing graphite boat container; j, the blanks contained in the sintering containing graphite boat container are placed into a vacuum sintering furnace, and the vacuum pumping processing is carried out after the furnace door is closed; k, vacuum forming sintering is carried out; l, finished products are cooled to the room temperature along with the furnace; m, cutting is carried out. Through the process step design, the method provided by the invention has the advantages that the bending rate of the hard alloy short rod materials can be effectively reduced, in addition, the bonding phenomenon can be effectively avoided, and the quality and the finished product rate of the hard alloy short bar materials can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of cemented carbide sintering processing, in particular to a method for reducing the bending rate of cemented carbide short rods. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy; cemented carbide has high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance, etc. A series of excellent properties, especially its high hardness and wear resistance, remain basically unchanged even at a temperature of 500 ° C, and still have high hardness at 1000 ° C. With the above excellent properties, cemented carbide is widely used in tool materials, such as turning tools, milling cutters, planers, drills, boring tools, etc. [0003] In addition, for cemented carbide, it generally includes refractory metal compounds and bonding metals, such as cobalt and nickel; in the cemented...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/16B22F5/12
Inventor 陈勇志钟守炎何伟锋叶静李荣泳陈海彬吴鹏杨宇辉
Owner DONGGUAN UNIV OF TECH