Camshaft specialized inoculant

Abstract

The invention discloses a camshaft specialized inoculant. The formula of the inoculant comprises: by weight, 5% of barium alloy, 4.5% of strontium alloy, 6.5% of rare earth ferrosilicon, 81.5% of ferrosilicon and 3.5% of silicozirconium. As elements of strontium, barium, zirconium, rare earth and the like are added into a traditional inoculant and contents of the above elements are adjusted in the invention, problems such as chilling tendency, graphite form, microstructure, hardness, wear resistance, processability and the like existing in camshaft products of the prior art are solved. Through long-term use of verification, the inoculant provided by the invention can be used to obviously refine microstructure of a camshaft, improve graphite form, make hardness of a camshaft uniform, increase wear resistance and reduce quality problems caused by processing. The inoculant has a wide application prospect in the industry.

Description

technical field [0001] The invention belongs to the field of cast iron inoculants, in particular to a special inoculant for camshafts. Background technique [0002] The camshaft is one of the important components of the engine. Its working environment is complex and has extremely high performance requirements. It needs to rotate continuously under high temperature. Therefore, the materials used must have good toughness and sufficient hardness and strength. For a long time, many domestic camshaft casting enterprises have generally used ordinary 75# ferrosilicon as the inoculant in the camshaft casting production process, and the camshaft products produced have excellent metallographic structure, hardness, wear resistance, processing performance, etc. There are many deficiencies, which cause the product to be unstable for a long time; in order to improve these deficiencies, some manufacturers have begun to try compound inoculants, but the problem of using compound inoculants i...

AI Technical Summary

Problems solved by technology

For a long time, many domestic camshaft casting enterprises have generally used ordinary 75# ferrosilicon as the inoculant in the camshaft casting production process, and the camshaft products produced have excellent metallographic structure, hardness, wear resistance, processing performance, etc. There are many deficiencies, which cause the product to be unstable for a long time; in order to improve these deficiencies, some manufacturers have begun to try compound inoculants, but the problem of using compound inoculants is that they cannot improve the overall performance of the camshaft at the same time, such as improving the tendency of camshaft whitening At the same time, it leads to a decrease in its hardness, improving the shape of graphite and increasing its processing difficulty.