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Production method iron-base composite material and hard metal using high current

A technology of iron-based composite materials and hard alloys, which is applied in the field of high-current preparation of iron-based composite materials and hard alloys, can solve the problems of time-consuming and energy-consuming, and achieve the effect of high relative density

Inactive Publication Date: 2006-11-29
SICHUAN UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Obviously, this method is time-consuming and energy-intensive
However, the report of using electric field to prepare WC-Co cemented carbide has not yet been found.

Method used

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  • Production method iron-base composite material and hard metal using high current
  • Production method iron-base composite material and hard metal using high current
  • Production method iron-base composite material and hard metal using high current

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Embodiment Construction

[0023] The embodiment given below is the specific description and further illustration of the present invention, can not be interpreted as the limitation of protection scope of the present invention, some non-essential improvement and adjustment that those skilled in the art make to the present invention according to above-mentioned content of the present invention still belong to protection scope of the present invention.

[0024] The implementation equipment used in the present invention is the Gleeble-1500D thermal simulator developed by the American DSI Science and Technology Consortium, which is composed of a vacuum system, a computer control system, and a heating system. The schematic diagram of the state where the green compact is clamped and heated by electricity in the heating system is as follows: figure 1 shown. According to the process conditions determined by the composition of the prepared materials, the programming is controlled by the computer system.

[0025...

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Abstract

The great current process of preparing iron-base composite material and hard alloy includes mixing powder of Fe, Ti and C, or Fe, V and C, or W, C and Co in certain proportion; pressing the mixture into blank of relative density of 65-78 %; acutely heating the blank in DC electric field of output voltage 3-10 V and current 3000-20000 an in the temperature rise speed of 50-1200 deg.c / sec and vacuum degree of 10E(-4) Pa to produce combustion composition; and heating at 800-1100 deg.c under the lasting action of the electric field for 2-5 min to complete reaction. The present invention has high relative density of pressed blank, great current, adjustable current and temperature rise speed and thus combustion composition at temperature lower than 800 deg.c; and the Fe content in the alloy can be altered in 30-85 %.

Description

technical field [0001] The invention belongs to the technical field of preparing iron-based composite materials and hard alloys by a combustion synthesis method, and in particular relates to a method for preparing iron-based composite materials and hard alloys with high current. Background technique [0002] It is understood that the current techniques for preparing iron-based composite materials by combustion synthesis mainly include the following: [0003] 1. Zou Zhengguang et al. (Reaction kinetics and structure formation process of self-propagating high-temperature synthesis of Ti-C-Fe system, Journal of Composite Materials 1999, 16(3): 78-81) adopted conventional tungsten wire ignition method, ignition temperature Above 1150°C, to stimulate the chemical reaction in the Ti+C system, and rely on the heat release of the reaction to maintain the reaction. This technology not only has a high ignition temperature, but also the occurrence and maintenance of the reaction is hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/02
Inventor 杨屹冯可芹
Owner SICHUAN UNIV
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