The main wear surface of the agriculture roller chain is pin surface
the pin surface strengthened of chemical nickel-plating
hard chrome plating and vanadinizing are carried out.The surface hardness and hardness layer thickness of three types pins with surface strengthened and the same specification pin of a abroad company are measured.The contrast wear test of a chain combined by chain segment of three types pins with surface strengthened and the same pitch number pin of abroad are carried out on LS910A close force stream abrasion tester.The test data show that the pin surface with hard chrome plating has a better wear resistance and is superior to abroad sample chain under the providing test condition.