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Integral self-type Cu-W contact quality analysis


* 5 [. ] [Ol copper chromium allowable stress [] = n is calculated through the design safety factor, get the correct parameters, but in the actual production and found that plastic deformation of individual contacts, what is the problem then? CuCr0.5 the chemical composition with cr (O.5 ~ 1.0), impurities 294MPa, ultimate strength> 394MPa, the vacuum sintering process, the solution and aging treatment to improve the hardness of chromium copper, increase the flexibility of materials, chromium copper aging treatment,[link widoczny dla zalogowanych], the junction hardness ≥ 9O, tail ≥ 100, we analyze the plastic deformation of the reason may be and the following factors: 1. By powder metallurgy sintering, the strength of copper-chromium alloy did not meet the requirements of technical conditions, during solution and aging treatment, the hardness of chromium copper is not enough, not enough material to increase flexibility, so that the ob, oo; not meet the technical requirements . It is reported that the cause is the use of powder metallurgy sintered CrCu Taijin grain microstructure becomes large,[link widoczny dla zalogowanych], such as cast eutectic of solution and aging treatment, reducing the tensile strength,[link widoczny dla zalogowanych], therefore, require the production of plant mass units Pun, Xinjiang Volume 7】 master solution and aging treatment at home and take enhanced measures to increase the strength of copper chromium. 2. After sintering, machining slot to tighten the processing of copper into the closed position chrome Taijin round table, it may not tighten the pressure suppression points, or pressing force is too large, beyond the material yield limit, plastic deformation. Shown in Figure 1, the machining pressure to tighten repression of points should be near the A, or AB will become the arc-shaped segment, touch not only the contact pressure can not guarantee that, and plastic deformation, and external contacts type has changed. Analysis of the reasons for the plastic deformation, the required stability of process contact the manufacturer, the aging treatment, the appropriate increase in the hardness of chromium copper, enhance the strength of contact materials, design, and we also contact the appropriate means to increase the thickness of h, increase self, which solves the problem of plastic deformation. (The closing date 2DD0 a O4 scull a l7) QUALITYANALYSISoFSELF-PRESSUREBYToTALCuWCoNTACTDaiTao (GuangzhouHigh-VoltageElectricApplianceFactory, Guangzhou, 510310) YangLin - qing (MaanshanIron & SteelLtd.Maanshan, 243501) KuangTongchun (GuangdongUniversityofTechnology, Guangzhou, 510090) ABSTRACTPhysicalandchemicalstructureandplasticdeformationofself - pressurebytotalCuWContactareanalysed. andpracti-calmeasurestosolvetheproblemsareproposed. KEYWORDSSF6circuitbreaker, CuWcontact, qualityanalysis. Double-crystal alloy to improve its toughness, Texas, the history of the city of the body Si deposition tool sets embarrassed Secretary Rice left open the D and Lu Tong WC,[link widoczny dla zalogowanych], 14Co homes similar but with the fracture toughness of the wear resistance of the 50 twin Yu WC -Co Yuan with quality homes. The House of Lu Tong's wc_C0 the same with the different homes to go in the dry: Lu Tung-hsiang, the contract is a simple package, ItWC capsule in vain for the fools same as the base of the homes, and new homes to go with Ii Lu WC-Co by the most Dayton vain scientific mission cobalt matrix with homes. So called Twin Yuan quality assistance contract with the toughness and similar tools roundworm, but the abrasion ? Southern. Lu Tong homes air. Ductile fracture toughness of the new stick by Gu mantis phase control. Fracture toughness is almost straight punch and cobalt phase between WC grain wasted proportional to the length an average of ten days from the DU. Lu through the WC-Co materials, the mean free path of 0.1 to 1.0 woolen rug at the end of the same, the history of Sri Lanka embarrassed tools, Si Division Yuan quality homes with double-crystal (DC) of the mean free criminal ounces j ~ Du between the end of 30 woolen rug. Lu Tong homes chest with the mean free air Du improve the wear resistance decreased. May be wasted by the amount of Aida quiet bad prepared 400,000,[link widoczny dla zalogowanych],000 controlled sub-contract Paul twin city so special collection of Yu's wear. DC ~ 14 homes gold Yuan degree 64HRC. DC-12 homes with the Yuan degree 62HRc. (Bei Fang feed study)

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