High-hardness automotive connection rod forged through ferrum-based powder in metallurgical manner and manufacturing method thereof

Abstract

The invention provides a high-hardness automotive connection rod forged through ferrum-based powder in a metallurgical manner. The high-hardness automotive connection rod is manufactured from, by weight, 93-94 parts of iron powder, 2.5-2.8 parts of cuprous iodide, 2-2.3 parts of Ni powder, 0.8-1.1 parts of Mn powder, 0.3-0.4 part of nickel-plated carbon powder, 0.5-0.6 part of boric acid lead, 0.3-0.4 part of zinc stearate, a proper amount of silane coupling agent kh 550, a proper amount of nano tungsten disulfide, a proper amount of polyethylene glycol and a proper amount of deionized water. According to the high-hardness automotive connection rod forged through ferrum-based powder metallurgy and a manufacturing method thereof, the nano-sized tungsten disulfide is used when water-atomized powder is made, the dispersity and lubricating property of the powder are good, the consumption of a lubricant is reduced, the density of a green body is increased, pores in finished products are few, the strength of alloy is improved greatly, the forging pressure and temperature are lowered, and energy is saved; and through the cuprous iodide, the Ni powder, the Mn powder, the nickel-plated carbon powder and the boric acid lead, the abrasive resistance and lubricating property of the connection rod are improved, the surface quality is good, hardness is improved, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a high-hardness 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 demould due to the large surface area of ​​the aspect ratio, and how to increase the strength of the green body Higher, increasing the capacity and productivity of existing presses, these are in urgent need of better lubricants. [0003] Processes such as double pressing / double sintering (DP / DS) and powder forging are well known and can achieve parts densities of 7.4 to 7.5 g cm -3 or close to full density. However, the production costs of these processes are very expensive. On the other hand, compared with the second pr...

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.