铜锰铝合金在不同腐蚀介质中的摩擦磨损性能

用304不锈钢球和氧化铝球做对偶件,研究了铜锰铝合金在H2SO4、NaCl和NaOH溶液中的摩擦磨损性能.结果表明,以不锈钢球为对偶件时,在H2SO4溶液中合金产生了严重的黏着磨损,摩擦因数大;在NaCl溶液中合金磨损表面产生氯脆,导致表层材料脆性剥落;在N aO H溶液中合金发生了溶解和氧化反应,磨损机制为腐蚀+磨粒...

Friction and wear properties of Cu-Mn-Al alloy in different corrosive media

The friction and wear properties of Cu-Mn-Al alloy were investigated against 304 stainless steel ball and alumina ball in H₂SO₄,NaCl and NaOH solutions,respectively.The results show that when 304 stainless steel ball is used as the pair,in H₂SO₄ solution,the wear failure form is severe adhesive wear,which leads to high friction coefficient,while in NaCl solution,the brittle spalling of the surface material induced by chlorine embrittlement was observed.In NaOH solution,the dissolution and oxidation reaction of the alloy were occurred,the wear mechanism is corrosion and abrasive wear,which produced smooth worn surface and low friction coefficient.When alumina ball is used as the pair,the adhesion between mating pairs is prevented because of the poor solubility between alumina and alloy,as a result,the shear stress decreases,the brittle spalling is restrained,and the friction coefficient and wear rate of the alloy in H₂SO₄ and NaCl solutions are significantly reduced;however,in NaOH solution,the matching materials have little effect on the wear properties of the alloy.