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hour219木蟲 (正式寫手)
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[求助]
漢譯英~謝謝
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在高溫氧化和腐蝕性環(huán)境中, 至今沒有任何普通金屬能像貴金屬一樣經(jīng)受得住高溫和復(fù)雜環(huán)境的考驗(yàn)。其中貴金屬Ir 、Rh、Ru 具有比Pt、Pd, 更高的抗拉強(qiáng)度和高溫?cái)嗔褟?qiáng)度(特別是Ir在2200 ℃ 的持久強(qiáng)度和蠕變斷裂強(qiáng)度遠(yuǎn)高于Pt-Rh合金)。但是相對低的常溫塑性、較差的抗高溫氧化性、高密度、高氧化揮發(fā)速率、有限的資源和昂貴的價(jià)格等多種因素制約了貴金屬Ir、Rh、Ru 及其合金的發(fā)展和應(yīng)用。 鉑基高溫結(jié)構(gòu)材料具有以下特性:(1) 具有高的熔點(diǎn);(2)在900℃ 以上大氣氣氛中具有好的抗氧化性和熱穩(wěn)定性;(3) 具有好的抗腐蝕性, 能經(jīng)受像硝酸、氫氰酸、氫氟酸以及直至1600 ℃ 熔融玻璃和其它硅酸鹽熔體的嚴(yán)重腐蝕;(4) 具有高的高溫強(qiáng)度性質(zhì)且力學(xué)性能穩(wěn)定;(5)具有好的延性和可加工性能, 可制作成所要求的結(jié)構(gòu)部件和產(chǎn)品;(6) 具有良好的可焊接性能, 可通過焊接制備成所要求的構(gòu)件。除了上述特點(diǎn), 相對多的資源及相對適合的價(jià)格, 使得鉑金屬材料在現(xiàn)代工業(yè)、國防科技和高新技術(shù)領(lǐng)域中具有特別重要的意義。 |

版主 (文壇精英)
米米
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In the high temperature oxidation and corrosion environment, no other normal metals can stand high temperature and complex environment like noble metal. Amongst the noble metals, Ir, Rh, and Ru have stronger tensile strength and high-temp break strength than Pt and Pd (especially in 2200C Ir has stronger rupture strength and creep break strength than Pt-Rh alloy). However, the development and application of noble metal Ir, Rh, Ru and their alloy are restricted by relatively low normal-temp plastic, worse high-temp oxidation resistance, high density, high oxidation evaporation velocity, limited resources, and high cost. Platinum-based high-temp structure material has the following properties: (1) high melting temperature, (2) good oxidation resistance and thermal stability in 900C or higher atmosphere, (3) good corrosion resistance so it can stand serious corrosion of nitric acid, hydrogen cyanide, hydrofluoric acid, up to 1600C melting glass, and other silicate melts, (4) good high-temp strength property and stable mechanical property, (5) good ductility and machinability property to be produced to required structure parts and products, (6) good weldable property to be welded to required parts. Besides the features above, relatively abundant resources and reasonable price make platinum material important in contemporary industry, defense technology, and advanced techniques. |
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