Unlock instant, AI-driven research and patent intelligence for your innovation.

A samarium cobalt vacuum sintering furnace and its application method

A vacuum sintering furnace, samarium cobalt technology, applied in the direction of furnace, furnace material, furnace type, etc., can solve the problems of slow cooling rate, inability to volatilize, single cooling rate, etc., to improve cooling uniformity, increase cooling speed, and suppress volatilization Effect

Active Publication Date: 2022-06-28
HANGZHOU PERMANENT MAGNET GRP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention mainly solves the problem that the existing sintering furnace cannot solve the problem of samarium volatilization in the samarium-cobalt sintering process. The long-term volatilization of samarium and a large amount of adhesion inside the furnace body will affect the heating elements, temperature measuring elements and heat preservation elements inside the furnace body. cause serious damage
At the same time, there are problems such as slow cooling rate, single cooling rate and uneven cooling temperature zone in the prior art.
In view of the above problems, the invention provides a samarium-cobalt vacuum sintering furnace and its application method. The vacuum sintering furnace of the present invention can effectively inhibit the volatilization of samarium and improve the temperature uniformity of sintering cooling. It has the characteristics of convenient operation, uniform cooling, energy saving and environmental protection. It can solve the problem that the production efficiency cannot meet the demand

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A samarium cobalt vacuum sintering furnace and its application method
  • A samarium cobalt vacuum sintering furnace and its application method
  • A samarium cobalt vacuum sintering furnace and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Step 1: Sintering

[0059] Put the prepared samarium cobalt magnet green body into the vacuum sintering furnace described in the general example, then close the furnace cover and vacuumize (evacuated to 3 × 10 -3 Pa), at this stage, the sintering protective cover is kept open, the furnace body is heated, the samarium cobalt magnet is exhausted through three stages of heat preservation at 200 ° C, 500 ° C and 900 ° C, and then heated to the pre-sintering temperature of 1185 ° C, and the sintering protective cover is lowered to It is closely attached to the rotating chassis, and argon gas is filled into the furnace body. The argon gas pushes up the pressure differential block through the inlet valve of the sintering protective cover, and the argon gas is filled into the sintering protective cover. The process is controlled by a pressure gauge and a program. Keep the vacuum at -0.05MPa and make it stable, then heat up to the sintering temperature of 1200 °C for 2 hours, th...

Embodiment 2

[0064] Step 1: Sintering

[0065] Put the prepared samarium cobalt magnet green body into the vacuum sintering furnace described in the general example, then close the furnace cover and vacuumize (evacuated to 3 × 10 -3 Pa), at this stage, the sintering protective cover is kept open, the furnace body is heated, the samarium cobalt magnet is exhausted through three stages of heat preservation at 200 ° C, 500 ° C and 900 ° C, and then heated to the pre-sintering temperature of 1185 ° C, and the sintering protective cover is lowered to It is closely attached to the rotating chassis, and argon gas is filled into the furnace body. The argon gas pushes up the pressure differential block through the inlet valve of the sintering protective cover, and the argon gas is filled into the sintering protective cover. The process is controlled by a pressure gauge and a program. Keep the vacuum at -0.05MPa and make it stable, then heat up to the sintering temperature of 1200 °C for 2 hours, th...

Embodiment 3

[0070] Put the prepared samarium cobalt magnet green body into the vacuum sintering furnace described in the general example, then close the furnace cover and vacuumize (evacuated to 3 × 10 -3Pa), at this stage, the sintering protective cover is kept open, the furnace body is heated, the samarium cobalt magnet is exhausted through three stages of heat preservation at 200 ° C, 500 ° C and 900 ° C, and then heated to the pre-sintering temperature of 1185 ° C, and the sintering protective cover is lowered to It is closely attached to the rotating chassis, and argon gas is filled into the furnace body. The argon gas pushes up the pressure differential block through the inlet valve of the sintering protective cover, and the argon gas is filled into the sintering protective cover. The process is controlled by a pressure gauge and a program. Keep the vacuum at -0.05MPa and make it stable, then heat up to the sintering temperature of 1200 ℃, the sintering time is 2 hours, and then cool...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the field of permanent magnet material preparation, and discloses a samarium-cobalt vacuum sintering furnace and an application method thereof. The samarium-cobalt vacuum sintering furnace includes: a furnace body and a heat exchange cooling mechanism arranged outside the furnace body and communicating with the furnace body. There is a rotating chassis and a sintering protective cover located above the rotating chassis that can be lifted; a driving mechanism is provided outside the furnace body; a lifting mechanism for the protective cover is provided on the furnace body; a ventilation structure is formed when the sintering protective cover and the rotating chassis are closed. The vacuum sintering furnace of the present invention can effectively suppress the volatilization of samarium and improve the temperature uniformity of sintering cooling, has the characteristics of convenient operation, uniform cooling, energy saving and environmental protection, and can solve the problem that the production efficiency cannot meet the demand.

Description

technical field [0001] The invention relates to the technical field of permanent magnet material preparation, in particular to a samarium cobalt vacuum sintering furnace and an application method thereof. Background technique [0002] Vacuum sintering furnace is a complete set of equipment that uses heating equipment elements to sinter metal powder in a vacuum environment or under inert gas protection conditions, and can achieve rapid cooling after sintering to achieve the required phase structure of the metal. For the sintering process of samarium cobalt magnets, samarium cobalt products will have a large amount of samarium volatilization during sintering, polluting the entire vacuum system, causing the heating rod to ignite, inaccurate temperature measurement, inaccurate pressure measurement, and volatile metal covering On the insulator, it affects the safety of the entire equipment, and the volatilized samarium is extremely difficult to clean, reducing the life of the hea...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F27B9/04F27B9/12F27B9/16F27B9/30F27B9/40
CPCF27B9/042F27B9/12F27B9/16F27B9/30F27B9/40F27B2009/124F27M2003/04
Inventor 沈定君赵宇樊金奎徐道兵冯建涛王栋
Owner HANGZHOU PERMANENT MAGNET GRP