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當前位置:不銹鋼鑄件成分
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-02-14]
耐蝕不銹鋼機械配件類、泵閥類、管道聯接類、支承類鑄件,主要材質為鉻鎳不銹鋼。根據化學成分的不同,大致分為Cr-Ni系,Cr-Ni-Mo、Cr-Ni-Cu、Cr-Ni-Mo-Cu系,Cr -Mn-N系,Cr-Ni -Mn -N系四個組別,其金相組織視其Cr 、Ni含量而定,可以是奧氏體-鐵素體復相鋼、雙相鋼或是單相奧氏體鋼。 Corrosion resistant stainless steel mechanical fittings, valve, pipeline connection, supporting castings, the main material for chromium nickel stainless steel. Depending on the chemical composition, roughly divided into Cr - Ni, Cr, Ni, Mo, Cr - Ni - Cu, Cr - Ni - Mo - Cu, Cr - Mn - N series, Cr - Ni - Mn - N series four categories, the metallurgical structure depends on the content of Cr, Ni, austenitic, ferritic phase can be steel, dual phase steel or single-phase austenitic steel.   對奧氏體-鐵素體不銹鋼的定義為: The austenitic, ferritic stainless steel is defined as:   當金相組織中鐵素體體積含量≤5%時,定義為單相奧氏體不銹鋼。 When the microstructure of ferrite when the volume content of 5% or less, defined as single-phase austenitic stainless steel.   當金相組織中鐵素體體積含量為5%~35%時,定義為奧氏體-鐵素體復相不銹鋼(在奧氏體基體中存在鐵素體)。 When the microstructure of ferrite volume fraction is 5% ~ 35%, defined as austenitic phase - ferrite stainless steel (austenitic matrix exists in the ferrite).   當金相組織中鐵素體體積含量為35%~55%時,定義為奧氏體-鐵素體雙相不銹鋼(奧氏體、鐵素體約各占一半)。 When the microstructure of ferrite content is 35% ~ 35%, the volume is defined as the austenitic, ferritic duplex stainless steel (austenitic, ferritic about half).   在特定工況下,使用的鉻鎳不銹鋼對鐵素體含量有規定要求。由于測定鐵素體含量的多種方法誤差較大,很難準確測得鐵素體體積含量。主要還是在熔煉時,怎樣合理配制爐料,既要保證化學成分、力學性能,又要實現鐵素體含量達到理想值,同時要兼顧制造成本,這為熔煉奧氏體-鐵素體不銹鋼鑄造工藝提出了創新課題。 Under certain conditions, the use of chromium nickel stainless steel is required for ferrite content. Error due to many kinds of method for determination of content of ferrite, it is difficult to accurately measure the ferrite volume fraction. Mainly in the smelting, how reasonable preparation furnace charge, both to ensure the chemical composition, mechanical properties, and to realize the ferrite content reach the ideal value, at the same time to give attention to both the manufacturing cost, the smelting austenitic - ferritic stainless steel casting technology innovation project are put forward.
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