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Preparation method of microporous hard alloy material

A cemented carbide and microporous technology, which is applied in the field of preparation of microporous cemented carbide round rods, can solve the problems that round rods are difficult to realize, and achieve the effect of uniform diameter and straight holes

Active Publication Date: 2019-08-09
ZHUZHOU XINKE HARD ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Dry-bag isostatic pressing has the advantages of high blank flatness and a wide range of product diameters. However, it is still difficult to produce round rods with micropores below 5mm in diameter by dry-bag isostatic pressing because the thin core rod cannot be removed.

Method used

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  • Preparation method of microporous hard alloy material
  • Preparation method of microporous hard alloy material

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings, so that those skilled in the art can understand the present invention.

[0028] as attached Figure 1~2 As shown, a microporous cemented carbide material prepares a mold, including: a mold (1), a screen (2), an upper plug (not shown in the figure), a lower plug (3), a soft core rod ( 4); Mold (1): This molding method adopts a dry bag isostatic mold, the mold size is diameter Φ (8.2 ~ 130mm) × length (200 ~ 650mm), and the mold material is rubber, plastic, polyurethane or modified polyurethane ; Screen (2): The screen (2) is composed of a screen frame, a screen body and a center hole sleeve, the outer diameter of the screen frame is consistent with the size of the mold cavity, and there is a balance pull rod (21) on the screen frame to ensure that the The sieve (2) is pulled up smoothly, and the center hole of the sieve (2) has a small round hole of 0.2-7mm, which is use...

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Abstract

The invention provides a preparation method of a microporous hard alloy material. The preparation method comprises the following steps of 1, preparing alloy raw materials and mixtures; 2, selecting amold (1) with a proper specification, a screen (2), a lower plug (3) and a soft core rod (4), buckling the end head of the soft core rod (4), making the soft core rod penetrate into the center hole ofthe lower plug (3) and then penetrate out of the screen (2), and sinking the screen (2) into the bottom of a mold cavity; 3, slowly adding the mixtures into the mold cavity, tensioning the soft corerod (4), and meanwhile, vibrating and striking the mold (1) so that the mixtures can uniformly pass through the screen (2) to fill the mold cavity, at the same time, ensuring the soft core rod (4) tobe located at the central position of the mold cavity, lifting the screen (2) by a certain distance, repeating above actions until the mold cavity is filled with the compacted mixtures, and then pulling out the soft core rod (4) form an upper plug and tensioning the soft core rod (4); and 4, carrying out compression molding by adopting dry bag type isostatic pressing, and drawing out the soft corerod (4) from a compacted blank to obtain the compacted blank.

Description

technical field [0001] The invention belongs to the technical field of hard alloy preparation, in particular to a method for preparing a microporous hard alloy round rod. Background technique [0002] Cemented carbide is a material with high hardness, high strength and high wear resistance. It is called "industrial teeth" and has been widely used in many fields of modern industry. The material of the cemented carbide rod itself is a composite material composed of a refractory metal compound (hard phase) and a bonding metal (bonding phase) produced by powder metallurgy. Cemented carbide rods can be widely used in various types of mechanical processing. Its main features are stable mechanical properties, high wear resistance and high impact resistance. Therefore, cemented carbide rods are mainly suitable for drills, end mills, Reamers etc. can also be used for cutting, punching and measuring tools. [0003] Among them, the cemented carbide drill bit is prone to heat and wear...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/04B22F3/03B22F3/11C22C29/06
CPCB22F3/03B22F3/04B22F3/11C22C29/005C22C29/06
Inventor 汪中玮宋耀强
Owner ZHUZHOU XINKE HARD ALLOY
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