Cheng Xiaole,Gao Yimin,Xing Jiandong,Tan Min
(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract£ºThe WC particles £¨0.076 mm¡«0.100 mm in size£© are selected as reinforced phase£¬ and 45 steel£¨carbon steel with 0.45£¥C£© as matrix£®The techniques of warm compaction are systematically investigated with powder metallurgy solid phase sintering method£®The performance of sliding friction wear of the composites is tested on a pin on disk tester£® The test results of warm compaction show that the composite sample containing 50£¥WC and 50£¥ 45 steel possesses the perfect compaction density£¨9.436 2 g£¯cm3£© and the relative density reaches 91.6£¥ under the condition of 140 ¡æ compaction temperature,320 kN stress,and lubricated with zinc stearate.The results of wear test show that the composite sample under the condition of warm compaction gains the best wear property,and the relative wear resistance is the 2.9 times of 15Cr cast iron£¬ 2.6 times of 20Cr cast iron and 2.8 times of the composite sample under the condition of room temperature compaction.And the wear mechanism of particle composites is analyzed by SEM£®
Keywords£ºwarm compaction;sintering in vacuum;pin on disk test;composites