公开(公告)号：US20170239760A1

公开(公告)日：2017-08-24

申请号：US15437901

申请日：2017-02-21

申请人： BWXT Nuclear Operations Group, Inc.

发明人： Frank A. ARGENTINE

IPC分类号： B23K35/30 ,  F16B5/08 ,  B23K9/173 ,  C22C19/05 ,  B23K9/167

摘要： Properties and performance of weld material between metals in a weldment is controlled by modifying one or more of the nitrogen content and the carbon content to produce carbide (e.g. MC-type), nitride and/or complex carbide/nitride (e.g. MX-type) type precipitates. Fusion welding includes (i) adjusting shield gas composition to increase nitrogen/carbon gas and nitride/carbide species, (ii) adjusting composition of nitrogen/carbon in materials that participate in molten welding processes, (iii) direct addition of nitrides/carbides (e.g. powder form), controlled addition of nitride/carbide forming elements (e.g. Ti, Al), or addition of elements that increase/impede solubility of nitrogen/carbon or nitride/carbide promoting elements (e.g. Mn), and (iv) other processes, such as use of fluxes and additive materials. Weld materials have improved resistance to different cracking mechanisms (e.g., hot cracking mechanisms and solid state cracking mechanisms) and improved tensile related mechanical properties.

公开(公告)号：US20220324066A1

公开(公告)日：2022-10-13

申请号：US17847715

申请日：2022-06-23

申请人： BWXT Nuclear Operations Group, Inc.

发明人： Frank A. ARGENTINE

IPC分类号： B23K35/30 ,  C22C19/05 ,  B23K35/38 ,  B23K9/23 ,  B23K9/028 ,  B23K9/167 ,  B23K9/173 ,  F16B5/08

摘要： Properties and performance of weld material between metals in a weldment is controlled by modifying one or more of the nitrogen content and the carbon content to produce carbide (e.g. MC-type), nitride and/or complex carbide/nitride (e.g. MX-type) type precipitates. Fusion welding includes (i) adjusting shield gas composition to increase nitrogen/carbon gas and nitride/carbide species, (ii) adjusting composition of nitrogen/carbon in materials that participate in molten welding processes, (iii) direct addition of nitrides/carbides (e.g. powder form), controlled addition of nitride/carbide forming elements (e.g. Ti, Al), or addition of elements that increase/impede solubility of nitrogen/carbon or nitride/carbide promoting elements (e.g. Mn), and (iv) other processes, such as use of fluxes and additive materials. Weld materials have improved resistance to different cracking mechanisms (e.g., hot cracking mechanisms and solid state cracking mechanisms) and improved tensile related mechanical properties.