Automobile connecting rod forged through abrasion-resistant corrosion-resistant iron-based powder in metallurgical manner and manufacturing method of automobile connecting rod

Abstract

The invention discloses an automobile connecting rod forged through abrasion-resistant corrosion-resistant iron-based powder in a metallurgical manner. The automobile connecting rod is composed of, by weight, 81 to 82 parts of iron powder, 5 to 5.8 parts of titanium powder, 2.3 to 2.6 parts of VC, 5.6 to 5.8 parts of MoC, 3.6 to 3.8 parts of phosphorized carbonyl iron powder, 0.3 to 0.4 part of zinc stearate, a proper amount of a silane coupling agent kh550, a proper amount of nanometer tungsten disulfide, a proper amount of polyethylene glycol and a proper amount of deionized water. By the adoption of the connecting rod, the nanometer tungsten disulfide is used in the water atomized powder manufacturing process, so that the dispersity and the lubricating performance of the powder are good, the use quantity of a lubricating agent is reduced, the density of a green blank is increased, pores of a finished product are small, the strength of alloy is greatly improved, and the forging pressure and the forging temperature are reduced. The titanium powder, the VC, the MoC, the phosphorized carbonyl iron powder and iron are used for forming a dense alloy structure, so that the connecting rod is excellent in abrasion resistance, tenacity, tensile strength and corrosion resistance.

Description

Technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a wear-resistant and corrosion-resistant iron-based powder metallurgy forged automobile connecting rod and a preparation method thereof. Background technique [0002] In the production of powder metallurgy parts, how to achieve the highest possible density at the lowest possible production cost, how to produce powder metallurgy parts with complex shapes that are difficult to demold due to the large surface area of ​​the aspect ratio, and how to make the green body strong Higher, increasing the capacity and productivity of existing presses, these are in urgent need of better lubricants. [0003] Processes such as secondary pressing / secondary sintering (DP / DS) and powder forging are well-known, and this type of process can make the density of parts reach 7.4~7.5g·cm -3 Or close to full density. However, the production costs of these processes are very expensive. On the other h...

AI Technical Summary

Problems solved by technology

This is likely because they are much more complex than conventional pressing processes under industrial and production conditions

[0005] Although various lubricants have solved certain parts densification and demoulding problems, the performance of the parts is still not comparable to that of casting. There are many voids, high brittleness, and low strength problems, and performance needs to be improved.