摘要
Abstract
Friction coefficient of galvannealed steel sheets under different contact pressure was studied by sliding test. The results show that, at the same deformation, the work-hardening of the low-strength substrate is stronger than that of high-strength substrate; the friction coefficient of the high-strength substrate galvannealed steel sheets is lower at the same contact pressure. Moreover, the friction coefficient of low-strength substrate galvanized steel sheets decreases from 0. 154 to 0. 136, and the friction coefficient of high-strength substrate galvanized steel sheets decreases from 0. 140 to 0. 135, when the contact pressure increases, but at the higher contact pressure, the decrease extent of friction coefficient is slow down. Furthermore, the effect of substrate strength on the friction coefficient using adhesion theory was investigated. The conclusions are as followings: friction coefficient is decided by a (mold and coating direct contact percentage of the total actual contact area) and substrate surface micro-hardness; a and substrate surface micro-hardness are mainly determined by substrate strength; the different substrate surface micro-hardness moves close to each other because of different work-hardening as the contact pressure increases, contributing to a equality, and finally the effect of substrate strength on friction coefficient of galvannealed steel sheets would be low.关键词
摩擦因数/接触压力/基板强度/加工硬化/黏着理论Key words
friction coefficient/contact pressure/substrate strength/work hardening/adhesion theory分类
矿业与冶金
