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High-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers and preparation method thereof

A cold extrusion, high-speed steel technology, applied in the field of stamping dies, can solve the problems of easy breakage, easy permanent deformation of punches, easy fractures, etc., and achieves the effect of not easy to fall off, easy to implement, and to improve heat resistance and wear resistance.

Active Publication Date: 2016-12-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a high-speed steel cold extrusion punch with a micron-sized tungsten carbide reinforcement layer to solve the problems that the existing high-speed steel cold extrusion punch is easy to be permanently deformed, easily broken, and easily damaged

Method used

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  • High-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers and preparation method thereof
  • High-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers and preparation method thereof
  • High-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers and preparation method thereof

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Effect test

preparation example Construction

[0030] The preparation method of the above-mentioned high-speed steel cold extrusion punch specifically comprises the following steps:

[0031] Step 1: Clean the surface of the high-speed steel cold extrusion punch body with acetone to obtain a surface-treated high-speed steel cold extrusion punch body;

[0032] Step 2: Use a laser drilling machine to perform laser drilling on the surface-treated high-speed steel cold extrusion punch body obtained in Step 1 under vacuum conditions or under the protection of inert gas, and then perform pickling. The acid solution used for pickling is: The volume concentration is any of 300ml / L hydrochloric acid, 60ml / L phosphoric acid, 120ml / L hydrogen peroxide, 300ml / L hydrofluoric acid or 200ml / L sulfuric acid, then rinse with water until neutral, and finally use ethanol Or ultrasonic cleaning with acetone to obtain the cleaned high-speed steel cold extrusion punch body with a concave tubular body;

[0033] Step 3: Place the cleaned high-spe...

Embodiment 1

[0047] Step 1: Clean the surface of the high-speed steel cold extrusion punch body with acetone to obtain a surface-treated high-speed steel cold extrusion punch body;

[0048] Step 2: Use a laser drilling machine to perform laser drilling on the surface-treated high-speed steel cold extrusion punch body obtained in Step 1 under vacuum conditions, with a diameter of 30 μm, a hole depth of 20 μm, and a hole spacing of 1000 μm; Pickling, the acid solution used for pickling is hydrochloric acid with a volume concentration of 300ml / L, then rinsed with water to neutrality, and finally ultrasonically cleaned with ethanol to obtain a cleaned high-speed steel cold extrusion punch body with a concave tubular body ;

[0049] Step 3: Place the cleaned high-speed steel cold extrusion punch body with a concave tubular body obtained in Step 2 in a vacuum carburizing furnace for carburizing at a temperature of 920° C. The carbon mass concentration in the vacuum carburizing furnace is: 0.9%,...

Embodiment 2

[0053] Step 1: Clean the surface of the hot high-speed steel cold extrusion punch body with acetone to obtain a surface-treated high-speed steel cold extrusion punch body;

[0054] Step 2: Use a laser drilling machine to perform laser drilling on the surface-treated high-speed steel cold extrusion punch body obtained in Step 1 under the protection of inert gas argon, with a hole diameter of 20 μm, a hole depth of 18 μm, and a hole spacing of 25 μm Then carry out pickling, the acid solution used for pickling is hydrofluoric acid with a volume concentration of 300ml / L, then rinsed with water to neutrality, and finally ultrasonically cleaned with acetone to obtain the cleaned high-speed steel with a concave tubular body. Extrusion punch body;

[0055] Step 3: Place the cleaned high-speed steel cold extrusion punch body with a concave tubular body obtained in Step 2 in a vacuum carburizing furnace for carburizing at a temperature of 930° C. The carbon mass concentration in the vac...

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Abstract

The invention discloses a high-speed steel cold-extrusion male die provided with micron-grade tungsten carbide reinforcing layers; the high-speed steel cold-extrusion male die includes a high-speed steel cold-extrusion male die body; the surface of the male die body is provided with a plurality of sunken tubular bodies; the surface of the male die body and the inner surfaces of the tubular bodies are each provided with the micron-grade tungsten carbide reinforcing layer. A preparation method for the high-speed steel cold-extrusion male die comprises the steps: carrying out surface treatment of the male die body; then carrying out laser drilling, pickling, and carrying out ultrasonic cleaning; carburizing the obtained cleaned male die body provided with the sunken tubular bodies in a vacuum carburizing furnace, to obtain a composite body provided with the micron-grade tungsten carbide reinforcing layers; and finally, post-treating the composite body to obtain the high-speed steel cold-extrusion male die provided with the micron-grade tungsten carbide reinforcing layers. The problems that conventional high-speed steel cold-extrusion male dies are easy to permanently deform, rupture and damage are solved, the whole mechanical properties and heat resistance and abrasion resistance properties of the composite material are improved, and the preparation method is simple and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of stamping dies, in particular to a high-speed steel cold extrusion punch with a micron-scale tungsten carbide reinforcing layer, and also relates to a preparation method of the high-speed steel cold extrusion punch. Background technique [0002] Stamping die is an indispensable process equipment for stamping production and is a technology-intensive product. The quality, production efficiency and production cost of stamping parts are directly related to the mold design and the precision and quality of mold parts. When the cold extrusion punch is working, it not only bears the action of the axial impact force, but also inevitably bears the action of the radial force, and its unit pressure can reach 4 to 6 times the strength limit of the blank material. Since the metal flows in the cavity during extrusion, the working surfaces of the punch and the die are subjected to severe friction. This friction and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21C25/02B21C25/10
CPCB21C25/02B21C25/025B21C25/10
Inventor 钟黎声王昕许云华赵梓源燕映霖陈利萍宋珂赵娜娜
Owner XIAN UNIV OF TECH
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