The Optimization Design Study of Warm Extrusion Forming Technology for Piston Head Semi-Processed

Abstract

Aiming at the problems of high performance piston head can not produced by using casting and hot die forging, the warm extrusion molding method is proposed, based on the analysis of factors influencing for forming, rational scheme of orthogonal experiment was designed, a series of analysis for simulation results by using the range analysis method and comprehensive balance method, the optimal forming process parameters combination are identified, the optimal result are verified by the DEFORM software.

Effects of warm extrusion temperatures on corrosion performance of 40Cr steel

“…In recent years, we can see the use of warm extrusion forming, an advanced manufacturing technology, which is a kind of net shape developed based on cold extrusion and near net shape processing [1]. The blank is heated to appropriate crystallisation temperatures following extrusion forming [2,3], which improves the micro-structures and surface quality of parts [4,5]. The performance following warm extrusion, which was between that of cold extrusion and hot extrusion, not only overcomes the problem associated with the large deformation resistance of cold extrusion, it also avoids overheating, burning, oxidation, decarburisation of heat processing, etc.…”