Method for sintering radially-oriented sintering samarium cobalt integrated magnetic ring

Abstract

The invention discloses a method for sintering a radially-oriented sintering samarium cobalt integrated magnetic ring and aims to solve the problems that in the conventional sintering method, the radially-oriented sintering samarium cobalt integrated magnetic ring is susceptible to cracking and has low finished product rate and the production cost is greatly increased. According to the method, the pressed radially-oriented sintering samarium cobalt integrated magnetic ring is placed into a novel vacuum sintering furnace, and heating and heat preservation are performed by the heating method of combining the traditional resistance heating with the microwave heating, so that the temperature of the magnetic ring is increased uniformly, thermal stress generated by that the magnetic ring is heated non-uniformly due to heating of a traditional resistance is reduced, the integrity of the magnetic ring is maintained, the finished product rate is increased, and the cost is reduced.

Description

technical field [0001] The invention relates to a sintering method of a sintered samarium cobalt permanent magnet material, in particular to a sintering method of a radially oriented sintered samarium cobalt integral magnetic ring. Background technique [0002] The sintering of existing sintered samarium cobalt permanent magnet materials is mostly carried out by external heating vacuum tube furnace (horizontal or vertical), and the resistance heating device is arranged outside the vacuum tube. Place the samarium cobalt product in the tube to make it reach the set temperature. This sintering method is adopted because the sintering uniform temperature zone of sintered samarium cobalt permanent magnet materials is narrow, and generally cannot exceed 5°C. If the temperature difference is large, it will lead to great differences in product performance, resulting in substandard magnetic properties of some products. . At present, this sintering method is roughly 5-30 kg per furn...

AI Technical Summary

Problems solved by technology

This sintering method is adopted because the sintering uniform temperature zone of sintered samarium cobalt permanent magnet materials is narrow, and generally cannot exceed 5°C. If the temperature difference is large, it will lead to great differences in product performance, resulting in substandard magnetic properties of some products.

At present, this sintering method is roughly 5-30 kg per furnace. This sintering method not only consumes a lot of energy, but also has a small amount of sintering and low efficiency. Moreover, the vacuum tube repeats high and low temperature processes in a high temperature air environment, which is easy to oxidize. Thin and needs to be replaced often

It is understood that there are also very few internal heating vacuum furnaces, that is, the resistance heating device is arranged in the vacuum furnace. After the heating device heats up, the product is directly heated. The advantage of this sintering method is that the amount of firing is large, and the disadvantage is that the temperature uniformity is poor. , the temperature uniformity must be adjusted by some special means, which has not been reported in the literature

Using these two methods to sinter radially oriented monolithic magnetic rings has the problem that the magnetic rings are easy to crack, and the yield of products after sintering is extremely low, resulting in high production costs.