Investigation on Frictional Characteristics and Drawbead Restraining Force of Dual Phase Steel with GI or GA Coating

摘要

Advanced high strength steels (AHSS) are used more and more in automotive industry for weight reduction. Improving metal flow and reduce friction are important to decrease part reject rates of AHSS. The present study focused on frictional characteristics and drawbead restraining force of Dual Phase (DP) steel with GI and GA coating, such as DP780+Z, DP780+ZF, DP590+Z, using experimental approach. It was carried out by using friction and drawbead tester in normal and warm die temperature to emulate real production conditions which is created by friction heat between high strength DP steel and dies. The effect of material properties, temperature, sliding velocity, surface roughness, dry and lubricant on friction behavior of DP steels is investigated. The restraining force draw through different radius of drawbead is evaluated. This study is benefit to the set up of technique parameters during sheet metal forming simulation.