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 Posted: Sat 3:03, 08 Jan 2011 Post subject: stivali ugg Zn-based alloy (30% ~ 50% Al) friction |
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Zn-based alloy (30% ~ 50% Al) Friction and Wear Behavior
Shape, sin wipe the process, the surface oxide film damage, friction occurs between the atomic interdiffusion kwu a tear; while the harder asperities may be embedded in a softer metal, the metal surface in the soft plowed groove, which lead to material wear. Light loads, the plastic zone asperities are independent, are oxidation wear, wear smaller. When the load increases, the plastic zone under the asperity interaction, in addition to oxidation wear as well adhesive and abrasive wear, which wear more complex changes. 2.3 The temperature on the friction and wear properties of the ambient temperature changes will change the metal friction surface adsorption, oxidation and mechanical properties and tribological properties of the material shown in Figure 4 for the trial Taijin at 100 ℃ the coefficient of friction and sample wear. Increase with the aluminum and zinc based alloys decreased friction and wear properties of the material surface temperature, surface microstructure and properties have a certain effect,[link widoczny dla zalogowanych], leading to friction coefficient. Also the temperature will change the role of the surrounding media and material properties of the friction characteristics change - of the rise in temperature changes the viscosity of lubricating medium, causing the oil film thickness, thereby reducing the lubricating effect, while the specimen temperature in the same surface plastic deformation under load prone, easy bruising and decreased carrying capacity of the surface, when the temperature rises enough to make the film rupture, lubrication failure,[link widoczny dla zalogowanych], the equivalent of a dry friction. Temperature, the adsorption and oxidation of change between the surface revolves with, while making the hardness change. Figure 4 alloy at 100% of test friction coefficient and wear test ocean 2.4 lubrication on friction and wear properties in good lubricating conditions, the sample formed a thin film between, making the friction between improved contacts, but also absorb the friction heat generated in the process to make it in a more stable temperature conditions, friction,[link widoczny dla zalogowanych], in the larger load is not easy to produce, revolves around a, shown in Figure 5 (a). In dry friction, the thermal softening of the metal surface, adhesion and easy oxidation of the plastic deformation, which led to changes in surface friction and topography, see Figure 5 (b). The friction surface in a relatively short period of time scratch, tear and damage to the friction parts, so that the friction coefficient of the sample increases, the wear performance. 3 Conclusions (1) at room temperature, with the sliding speed increases, friction ring zinc-based Taijin 5 oil lubrication (a) and friction (b) the friction surface morphology of x200 can improve the wear performance enhancements. ZA30 in 400r/min good friction and wear properties, friction coefficient of 0.0483. (2) load increases, the zinc-based Taijin friction and wear properties to ZA45 better. (3) 100 ZA30 has good friction and wear properties. (4) dry friction less friction and wear properties, so the zinc-based Taijin inappropriate for dry friction conditions. References: [1] Yimin Tu, He Bolin, Li Xing-side box and ZA-27 sets Welding ductile iron [J]. Thermal processing technology. 2003. (6): 27.28 [2] more zl27 Taijin winding device in a large rotary kiln supporting the application 【J]. Thermal processing technology. 2000. (2): 5I-523lOelneu ~ i] leTribologiealBehaviclHTZn-】 Alloys (ZA27ComparedWithBronzeWhenUsed aiming aBem'ingMaterialwithHighLoad bleed at the nose dmVeryISpe ~ J 【J] Wear】 985. (105): 2834: Wei Wei unlucky. It like Romania. Mn on the creep pressure ZA27 alloy behavior [J: HEAT TREATMENT .2003. (I): 15I7f5J Sun Jiashu metal wear M] Beijing: Metallurgical Industry Li Jianming wear a metal plate Mu .1992.6 Science [M] Beijing: Metallurgical Industry Press .1990 【7] Pi Yanan. RE Zn-friction properties of the base Taijin [Jj. Nanchang 』= School of .1997. (12): 90292. Tin Industry in Jiangsu Jinfangyuan closed state into Eastern Europe before forging equipment, CNC Machine Co., Ltd., Jiangsu Golden radius of the production of CNC turret punch press and CNC bending machine successfully exported to Russia. Both the total amount of $ 180,000 equipment. including CNC turret punch only the rf beads J3 ten thousand U.S. dollars amount to up to a radius of Jiangsu Golden CNC Machine Tool Co.,[link widoczny dla zalogowanych], Ltd. has been committed for many years m high mechanical and electrical products R & D and production,[link widoczny dla zalogowanych], 2.4 billion sales in 2004 elections in the expanding domestic market, the company j pi actively expand the international market. efforts to improve the technological content of export products. the products are exported to Turkey, Singapore and other countries on the basis of a new development in early this year, Russia and Pakistan and other international markets (China Industry News)
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