Fe-based powder metallurgy material for valve element of check valve

Abstract

The invention discloses an iron-based powder metallurgy material for a check valve core, which comprises the following components in terms of mass parts: 20-25 parts of silicon dioxide, 22-25 parts of titanium dioxide, 12-15 parts of iron oxide, 10 ‑12 parts of magnesium oxide, 12‑15 parts of aluminum oxide, 3‑5 parts of acrylamide, 8‑10 parts of nano tungsten carbide powder, 5‑6 parts of silver powder, 6‑7 parts of silicon carbide whiskers, 5‑6 parts of nano oxide Zinc, 10-15 parts of nano glass fiber, 10-15 parts of polytetrafluoroethylene, 12-15 parts of cobalt powder, 10-12 parts of ammonium phosphate, 7-10 parts of magnesium hydroxide, 200-250 parts of iron powder. The iron-based powder metallurgy material of the check valve spool interpenetrates the metal phase and the non-metal phase, and is tightly combined, which increases the wettability and adhesion of the non-metal phase and the metal phase, and can prevent component segregation, making the material structure Uniform, increased strength and toughness, and good heat resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to an iron-based powder metallurgy material for a valve core of a check valve. Background technique [0002] A valve is a device used to control the direction, pressure, and flow of a fluid in a fluid system. It is a device that makes or stops the flow of media (liquid, gas, powder) in piping and equipment and controls its flow. [0003] There are many materials used in valves, among which powder metallurgy materials have simple manufacturing process, high manufacturing precision and cost saving, but there are many problems in powder metallurgy. For example, ordinary iron-based powder metallurgy materials have poor heat resistance, corrosion resistance, poor load-bearing capacity, and insufficient mechanical properties such as strength, hardness, and impact resistance. [0004] Metal has the characteristics of thermal shock resistance and good toughness, but metal is easy...

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between the non-metallic phase and the metal phase, it is easy to cause segregation of components, poor structure uniformity, uneven strength, mottled appearance, poor running-in performance, poor wear resistance, can not withstand large pressure, severe heat decay, and crack resistance. Poor performance, poor cold and heat fatigue resistance, reduced performance and shortened service life