A powder metallurgy automobile transmission shift mechanism support and preparation method thereof

Abstract

The invention discloses a novel powder metallurgy automobile-transmission gearshift-mechanism base. The base is characterized in that: the base is prepared from following raw materials in parts by weight: 92-93 of iron powder, 1.2-1.4 of graphite, 0.5-0.8 of copper, 5.2-5.6 of nickel, 11.2-12.3 of titanium, 3.2-3.4 of Sr, 0.15-0.25 of Hf, 0.4-0.6 of La, 0.2-0.5 of Ce and 2-3 of an auxiliary agent; the auxiliary agent is added into the base, so that alloy powder is dispersed uniformly, the vertical and horizontal uniformity of the internal organizational structure of a product is guaranteed, and the fatigue lifetime of the product is prolonged; the titanium added in Fe-based powder metallurgy can form a single-phase solid solution with Fe, thus reinforcing a matrix and enhancing wear resistance and corrosion resistance of the matrix; and the base has a simple technology, a high production efficiency and a low comprehensive cost.

Description

technical field [0001] The invention relates to the field of powder metallurgy, in particular to a powder metallurgy automobile transmission shift mechanism support and a preparation method thereof. Background technique [0002] In the gear shifting mechanism of new energy vehicles, the support is used for gear shifting. It is in frequent motion and is a key part of the gear shifting mechanism. It not only needs to have high dimensional and shape accuracy, but also needs to have relatively high Comprehensive mechanical properties such as high tensile strength, fatigue resistance and wear resistance. There are some deficiencies in the product structure and manufacturing method of the new energy vehicle transmission shift mechanism support in the prior art. In terms of manufacturing, the existing new energy vehicle gearshift mechanism support is usually made of 45 steel or cast steel as a blank, and then it is made through multiple processes such as mechanical cutting and hea...

AI Technical Summary

Problems solved by technology

Both of the above two manufacturing methods can process the new energy vehicle gearshift mechanism support that meets the requirements of use, but there are obvious shortcomings: the new energy vehicle gearshift mechanism support is a special-shaped component, the structure is complex, and the precision requirements are high. Higher comprehensive mechanical properties are required. Using the above two manufacturing methods, the entire manufacturing process is complicated, costing materials and labor, and the product qualification rate is low.