Powder metallurgy magnet ring for high temperature-resistant new energy automobile magnetic water pump

Abstract

The invention discloses a powder metallurgy magnet ring for a high temperature-resistant new energy automobile magnetic water pump. The powder metallurgy magnet ring is prepared from, by weight parts, 19-21 parts of chromium, 0.025-0.028 part of carbon, 0.2-0.4 part of tungsten, 0.6-0.9 part of yttrium, 11-13 parts of copper, 0.9-1.4 parts of nano-graphite powder, 0.6-0.8 part of niobium oxide, 1-2 parts of high density polyethylene powder, 0.2-0.4 part of aluminum hydroxide, 1.9-2.4 parts of ethyltrimethoxysilane, 2-3 parts of asphalt emulsion, 7-9 parts of petroleum resin, 0.7-0.9 part of mangan zinc ferrite and 52-55 parts of iron. A layer of copper film covers the surface of the modified nano-graphite powder to serve as a solid lubricant, modified mangan zinc ferrite is further added, ingredients such as tungsten and yttrium are added, a sintering and high temperature annealing process is adopted, material morphology is improved, the powder metallurgy magnet ring is resistant in flaming and high temperature, and the goals that the soft magnetic ferrite magnet rings are stacked in string densely and are not subjected to cracking and adhesion and chip off-falling are achieved.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a powder metallurgy magnetic ring for a high-temperature resistant new energy vehicle magnetic water pump and a manufacturing method thereof. Background technique [0002] Soft magnetic materials are a kind of common functional materials, which are widely used in motors, generators, transformers, sensors and other electrical equipment, and are very important components of advanced equipment in modern civilization. Its characteristic is that it can respond quickly and reach a saturated magnetization state under a small magnetic field, and the magnetization state almost disappears after the external magnetic field is removed, and it is easy to control the magnetization state of the material by slightly changing the external field. With the continuous development of the automobile industry, the penetration rate of environmentally friendly, energy-saving and emission-reduc...