| 摘要 |
<p>PURPOSE: A special sintered alloy for a locker arm tip with excellent abrasion resistance and sliding property and a manufacturing method thereof are provided to simplify the manufacturing process of sintered alloy for locker arm tip, thereby reducing the cost and improving the heat resistance and self-lubricative property. CONSTITUTION: A manufacturing method of special sintered alloy for a locker arm tip comprises the following steps of: mixing (S1); molding (S2); sintering (S3); heat-treating (S4); first coating (S5); and second coating (S6). In the step of first coating, a mixture is coated on the tempered green compact in a thickness of 0.5 to 2 mm, wherein the mixture is mixed in the ratio of 5 to 10 parts by weight of polyetherketonetherketon (PEKEK) and 3 to 5 parts by weight of polyetheretherketone (PEEK), 0.5 to 1.5 parts by weight of carbide particles, 10 to 20 parts by weight of fullerene, and 1 to 2 parts by weight of diamond-like carbon (DLC) to 10 parts by weight of polyetherketone (PEK). In the step of second coating, a mixture is coated on the first coated green compact in a thickness of 50 to 300 um, wherein the mixture is mixed in the ratio of 1 to 5 parts by weight of cobalt carbonate, 20 to 30 parts by weight of orthophosphoric acid, and 2 to 10 parts by weight of phosphorous acid to 100 parts by weight of cobalt carbonate. [Reference numerals] (AA) Start; (BB) End; (S1) Step of mixing C, NI, Cr, Mo, Si, P, MnS, MnS, and Fe; (S2) Step of forming the mixed powder from the mixing step by pressurizing the powder under a pressure of 10-12 ton/cm2 at the room temperature; (S3) Step of sintering the formed product in a hydrogen gas atmosphere at a temperature of 1100-1200 degrees; (S4) Step of tempering the sintered product at a temperature of 170-190 degrees for 100-150 minutes; (S5) Step of primarily coating the tempered product with a mixture of polyetherketone, polyetherketonetherketon, polyetheretherketone, carbide particles, fullerene, and DLC; (S6) Step of secondarily coating the product with a mixed solution of cobalt carbonate, orthophosphoric acid, and phosphorous acid</p> |
