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公开(公告)号：US11130190B2
公开(公告)日：2021-09-28
申请号：US16329117
申请日：2017-08-29
发明人： Zhen Jiao , Yunhong Zhou
IPC分类号： B32B15/01 , C23C26/02 , C22C38/22 , B23K9/04 , B23K9/16 , B23K35/32 , B23K35/02 , B23K35/30 , C23C28/02 , C23C30/00 , B32B15/18 , B32B15/04 , C23C26/00 , B23K103/04
摘要： Molybdenum is alloyed into stainless steel surface by electro-spark deposition technique. Shielding gas is used during electro-spark deposition process to minimize the oxidation of materials. Control of electro-spark voltage, frequency, capacitance, time can determine the alloying depth of Molybdenum. The alloyed surface thickness varies from 5 μm to 80 μm depending on the electro-spark deposition parameters. The alloyed surface comprises, by weight, 15 to 40% of Molybdenum, 8 to 22% of Cr, 0-15% of other alloy elements and impurities. The molybdenum alloyed stainless steel surface exhibits improvement in micro-hardness, wear resistance, and especially corrosion resistance in sodium chloride solutions. Thus, the present invention would be utilized in marine and handling of brines application, as well as in other applications which better corrosion resistance of stainless steel is desired.
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公开(公告)号：US20190232412A1
公开(公告)日：2019-08-01
申请号：US16329117
申请日：2017-08-29
发明人： Zhen Jiao , Yunhong Zhou
CPC分类号： B23K9/042 , B23K9/04 , B23K9/16 , B23K35/0261 , B23K35/3093 , B23K35/32 , B23K2103/05 , B32B15/013 , C21D2211/001 , C21D2211/005 , C22C38/22 , C23C26/02
摘要： Molybdenum is alloyed into stainless steel surface by electro-spark deposition technique. Shielding gas is used during electro-spark deposition process to minimize the oxidation of materials. Control of electro-spark voltage, frequency, capacitance, time can determine the alloying depth of Molybdenum. The alloyed surface thickness varies from 5 μm to 80 μm depending on the electro-spark deposition parameters. The alloyed surface comprises, by weight, 15 to 40% of Molybdenum, 8 to 22% of Cr, 0-15% of other alloy elements and impurities. The molybdenum alloyed stainless steel surface exhibits improvement in micro-hardness, wear resistance, and especially corrosion resistance in sodium chloride solutions. Thus, the present invention would be utilized in marine and handling of brines application, as well as in other applications which better corrosion resistance of stainless steel is desired.
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