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A kind of titanium fiber toughening cold heading die and preparation method thereof

A titanium fiber and cold heading technology is applied in the field of titanium fiber toughening cold heading mold and its preparation, which can solve the problem of high cost, improve the bonding force and interface structure, easily satisfy the process conditions, and save costs.

Active Publication Date: 2021-08-06
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] An object of the present invention is to provide a titanium fiber toughened cold heading die, which solves the problem that the existing cold heading die needs to use rare metals and the cost is high

Method used

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  • A kind of titanium fiber toughening cold heading die and preparation method thereof
  • A kind of titanium fiber toughening cold heading die and preparation method thereof
  • A kind of titanium fiber toughening cold heading die and preparation method thereof

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preparation example Construction

[0034] A kind of preparation method of titanium fiber toughening cold heading die of the present invention comprises the following steps:

[0035] Step 1, weigh the following components according to mass percentage, WC powder 70%-85%, Fe powder 5%-15%, Ti fiber 10%-20% and graphite powder 1%-3%, the above components The sum of the mass percentages is 100%; the particle size of the WC powder is 3 μm-10 μm, the particle size of the Fe powder is 8 μm-12 μm, and the diameter of the Ti fiber is 200 μm-1000 μm.

[0036]In step 2, use a ball mill to uniformly mix the WC powder, Fe powder and graphite powder weighed in step 1 to form a mixed powder. During the mixing process, the speed of the ball mill is 80-120r / min, and the ball milling time is 2h-10h. Add the mixed powder and binder into the kneader, the speed of the kneader is 30-50r / min, heat the solid mixed powder in the kneader, the heating temperature is 130°C-150°C, and the binder Wet the powder after heating and melting, an...

Embodiment 1

[0042] Prepare a kind of WC volume fraction and be the titanium fiber toughened cold heading die of 45%, comprise the following steps:

[0043] Step 1, weigh the following components according to mass percentage, WC powder 70.9%, Fe powder 7.9%, Ti fiber 19.3% and graphite powder 1.9%, the sum of the mass percentages of the above components is 100%; wherein, WC powder The particle size of Fe powder is about 8 μm, and the particle size of Fe powder is about 10 μm.

[0044] Step 2, use a ball mill to mix the WC powder, Fe powder and graphite powder weighed in step 1 evenly to form a mixed powder. During the mixing process, the ratio of grinding balls to powder is 2:1, and the ball mill speed is 120r / min. The time is 6h.

[0045] Add the mixed powder and binder into the kneader, start the kneader at a speed of 50r / min, heat the solid mixed powder in the kneader at a heating temperature of 140°C, and wait until the binder is heated Wet the powder after melting and fully wrap it ...

Embodiment 2

[0052] Prepare a kind of WC volume fraction and be that the titanium fiber toughening cold heading die of 47%, comprises the following steps:

[0053] Step 1, take the following components according to mass percentage, WC powder 72.2%, Fe powder 8.4%, Ti fiber 17.5% and graphite powder 1.9%, the sum of the mass percentages of the above components is 100%; wherein, WC powder The particle size of Fe powder is about 8 μm, and the particle size of Fe powder is about 10 μm.

[0054] Step 2, use a ball mill to mix the WC powder, Fe powder and graphite powder weighed in step 1 evenly to form a mixed powder. During the mixing process, the ratio of grinding balls to powder is 2:1, and the ball mill speed is 80r / min. The time is 4h.

[0055] Add the mixed powder and binder into the kneader, start the kneader at a speed of 40r / min, heat the solid mixed powder in the kneader at a heating temperature of 140°C, and wait until the binder is heated Wet the powder after melting and fully wra...

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Abstract

The invention discloses a titanium fiber toughening cold heading mold. The cold heading mold contains a Ti fiber mesh skeleton, and the Ti fibers forming the Ti fiber mesh skeleton are covered with a TiC layer, and the TiC layer is composed of submicron TiC particles. , micron-scale WC particles and Fe binder phase are dispersed between the Ti fiber network framework; Ti fiber network framework is composed of multiple transverse Ti fibers and longitudinal Ti fibers connected, the transverse Ti fibers are helical fibers, and the transverse Ti fibers are helical fibers. The fibers are connected with longitudinal Ti fibers from the inside to the outside. The invention also discloses a method for preparing a titanium fiber toughened cold heading mold. The titanium fiber toughened cold heading mold prepared by the method does not contain rare metals, has low manufacturing cost, high toughness and can be widely used.

Description

technical field [0001] The invention belongs to the technical field of cold heading dies, and relates to a titanium fiber toughened cold heading die and a preparation method thereof. Background technique [0002] As an important part of the cold heading machine, the cold heading die is often used for cold heading, cold punching and upsetting of metal materials. During the cold heading deformation process, it must bear a large unit pressure and severe impact load. The cold heading mold is required to be both It has good impact toughness and certain wear resistance. [0003] Cemented carbide has the characteristics of high hardness and high strength. It is an ideal material for cold heading dies and is widely used. At present, in order to improve the toughness of cold heading dies, high-cobalt (Co%≈20%) cemented carbides are generally used. However, its inherent low bending strength, poor toughness and other problems lead to a decline in performance. On the one hand, the co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C49/02C22C49/14C22C47/12C22C47/06B22F5/00B22F3/22B22F3/10B21J13/02C22C111/02
CPCB21J13/02B22F3/1007B22F3/1021B22F3/1039B22F3/225B22F5/007C22C47/06C22C47/12C22C49/02C22C49/14
Inventor 钟黎声崔鹏杰卢正欣梁淑华邹军涛朱建雷白海强
Owner XIAN UNIV OF TECH
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