Manufacturing method for high-temperature-resistant powder metallurgy connecting rod

Abstract

The invention discloses a manufacturing method for a high-temperature-resistant powder metallurgy connecting rod. According to the manufacturing method, raw materials of 60-65 parts of copper powder, 15-25 parts of zirconium silicide, 2-8 parts of tin powder, 4-9 parts of graphite, 10-20 parts of nano-ceramic powder, 3-8 parts of gallium trichloride, 4-9 parts of an auxiliary agent, 6-8 parts of nano-titanium carbide, 3-6 parts of manganese oxide, 4-8 parts of silicon nitride and 3-5 parts of beryllium oxide are included, wherein the auxiliary agent is composed of 1,6-hexanediol diacrylate, hydrogenated tallow amine and sodium bismuthate according to the weight ratio of 6:1-4:4. The manufactured high-temperature-resistant powder metallurgy connecting rod has the beneficial effects that the hardness is high, the wear resistance is good, the metallurgical structure is improved in cooperation with rare earth elements and nanometer particles, the structure is compact, the microstructure is good, the number of pores is small, and the structural rigidity, hardness, fatigue resistance and tensile strength performance are excellent.

Description

technical field [0001] The invention belongs to the field of powder metallurgy and relates to a method for preparing a high-temperature resistant powder metallurgy connecting rod. technical background [0002] The connecting rod is used to connect the piston and the crankshaft, transmit the force acting on the piston to the crankshaft, and convert the reciprocating motion of the piston into the rotational motion of the crankshaft. The connecting rod bears the force of the gas from the piston pin, its own swing and the reciprocating inertial force of the piston group. The magnitude and direction of these forces change periodically. Therefore, the connecting rod is subjected to alternating loads such as compression and tension. The connecting rod must have sufficient fatigue strength and structural rigidity. Insufficient fatigue strength will often cause the connecting rod body or connecting rod bolts to break, and then cause a major accident of complete machine damage. I...

AI Technical Summary

Problems solved by technology

Nanomaterials can meet the requirements that traditional materials cannot meet. At the same time, the application of nanomaterials can meet the special requirements for material performance in the field of metal processing. However, there are few disclosures about the application of nanomaterials in powder metallurgy technology in the prior art. and immature technology

At present, the main problem in the use of nanomaterials is the agglomeration of nanopowder particle materials, which leads to the particle agglomeration of powder particle materials due to the surface tension of particles during use, which leads to the addition of chemical decomposition agents for agglomeration during use. The decomposition of particles can be used normally, but this will increase the difficulty of use and chemical pollution, while reducing the use efficiency, which limits the application of this nanomaterial in powder metallurgy technology