| 引用本文: | 向永华，徐滨士，吕耀辉，姜 祎，夏 丹，刘存龙.等离子熔覆快速成形铁基合金的设计及其组织和性能评价[J].中国表面工程,2010,(4):39~43 |
| XIANG Yong–hua, XU Bin–shi, LV Yao–hui, JIANG Yi, XIA Dan, LIU Chun–long.Fe-based Alloy Design in Rapid Prototyping by Plasma Arc Overlaying and Its Structure and Performance Investigation[J].China Surface Engineering,2010,(4):39~43 |
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| 摘要: |
| 研制适用于快速成形多层熔覆条件下的专用合金材料，是当前直接金属快速成形领域的研究热点。文中总结了等离子熔覆快速成形铁基合金的设计原则，在大量试验的基础上，设计出了一种等离子熔覆快速成形新型铁基合金，并对成形件进行了组织性能评价，为该材料的工程应用打下基础。结果表明，冶金层组织主要以固溶体结晶为主，显微硬度从表面到基体呈U形分布，合金粉末具有优良的成形性和抗裂性，能够满足快速成形多层熔覆的要求。 |
| 关键词: 等离子熔覆 快速成形 铁基合金设计 |
| DOI： |
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| 基金项目:国家自然科学基金（51079011，51179018）；国防基金(代号略) |
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| Fe-based Alloy Design in Rapid Prototyping by Plasma Arc Overlaying and Its Structure and Performance Investigation |
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XIANG Yong–hua, XU Bin–shi, LV Yao–hui, JIANG Yi, XIA Dan, LIU Chun–long
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Transportation & Logistics Engineering College, Dalian Maritime University, Dalian 116026
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| Abstract: |
| For exploitation new nontoxic antifouling paints, marine benthic diatoms were incubated and used for the settlement tests in laboratory. Four coatings were prepared in which it contained respectively with 2%, 3%, 5% and 10% of tourmaline powders. The settlement behavior of marine benthic diatoms on these coatings was investigated according to the measurement of chlorophyll a and quantitative image processing based on the photos taken by stereomicroscope. The results showed that the fraction of the benthic diatoms attached on the coatings changes with the increase of tourmaline contents in paint. The coating with 2% tourmaline doesn’t inhabit obviously the settlement of benthic diatoms. The coating with 3% tourmaline strongly inhabit the settlement of benthic diatoms. The tourmaline content increases from 3% to 10%, the inhabiting effect of tourmaline decreases. The mechanism of tourmaline inhabiting the activity and the attachment of marine benthic diatoms can be attributed to that tourmaline makes water molecule decompose into H+ and OH-, at the same time, it electrolyses seawater and results in the sodium hypochlorite, Cl2，HClO and ClO- made on the surface of the coatings, these strong oxidabnts are toxic for the benthic diatoms and inhabit the activity and the attachment of marine benthic diatoms. It predicates the application potential of tourmaline in new nontoxic marine antifouling coatings. |
| Key words: tourmaline antifouling coating settlement benthic diatoms |
