Powder metallurgy engine oil delivery pump rotor and manufacturing method thereof

Abstract

The invention discloses a powder metallurgy engine oil delivery pump rotor. The powder metallurgy engine oil delivery pump rotor is characterized by being manufactured from, by weight, 0.2-0.3 part of powdered sulphur, 9-10 parts of zinc powder, 3-4 parts of molybdenum powder, 2-3 parts of copper powder, 13.5-14.5 parts of Ni, 24-25 parts of Cr, 3-4 parts of Mo, 48-51 parts of iron powder and 2-3 parts of auxiliaries. According to the powder metallurgy engine oil delivery pump rotor, the hardness of the surface of the rotor is effectively improved, a friction coefficient is lowered, abrasion resistance of the rotor is substantially improved, the rotor is excellent in structural rigidity, hardness, fatigue resistance and tensile strength performance, production cost is lowered, and quality of the product and economical benefits can be improved.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy engine fuel delivery pump rotor and a preparation method thereof. Background technique [0002] The powder metallurgy rotor for the diesel engine fuel pump is one of the key parts in the diesel engine. Its function is to suck the diesel out of the fuel tank and spray it into the combustion chamber through high-speed rotation. The plug type is the main type, but since 2008, the country has upgraded the automobile exhaust emission standard, and the engine of the Euro 2 emission standard is facing elimination. It is made by metallurgical forging and quenching process, but after quenching, the deformation of parts is not easy to control, the interchangeability is very poor, and the production cost is also high. However, due to the poor lubricity and low viscosity of diesel oil, the diesel oil delivery pump must have a high speed and a small meshing gap to suck ou...

AI Technical Summary

Problems solved by technology

[0002] The powder metallurgy rotor for the diesel engine fuel pump is one of the key parts in the diesel engine. Its function is to suck the diesel out of the fuel tank and spray it into the combustion chamber through high-speed rotation. The plug type is the main type, but since 2008, the country has upgraded the automobile exhaust emission standard, and the engine of the Euro 2 emission standard is facing elimination. Metallurgical forging, made by quenching process, but after quenching, the deformation of parts is not easy to control, the interchangeability is poor, and the production cost is also high

However, due to the poor lubricity and low viscosity of diesel oil, the diesel oil delivery pump must have a high speed and a small meshing gap to suck out the diesel oil, and high speed, poor lubricity, and small clearance require the rotor to have a high speed. Hardness and wear resistance, currently only through heat treatment and quenching to meet these requirements, low production efficiency, poor product consistency