<ruby id="p5nvx"><i id="p5nvx"><del id="p5nvx"></del></i></ruby>
<span id="p5nvx"><dl id="p5nvx"></dl></span>
<strike id="p5nvx"><dl id="p5nvx"></dl></strike><span id="p5nvx"><video id="p5nvx"><del id="p5nvx"></del></video></span> <strike id="p5nvx"></strike>
<span id="p5nvx"></span><ruby id="p5nvx"><i id="p5nvx"><del id="p5nvx"></del></i></ruby><ruby id="p5nvx"><ins id="p5nvx"><cite id="p5nvx"></cite></ins></ruby>
<strike id="p5nvx"></strike>
<span id="p5nvx"><video id="p5nvx"></video></span>
<strike id="p5nvx"><video id="p5nvx"><ruby id="p5nvx"></ruby></video></strike>
<strike id="p5nvx"><dl id="p5nvx"></dl></strike><strike id="p5nvx"></strike>
<strike id="p5nvx"></strike>
關閉
一鍵撥號
聯系方式
保定宏晟隆精密鑄造有限公司
公司地址:保定南市區朱莊
電 話:0312-8928995
電 話:0312-2157611
手 機:13833227175
傳 真:0312-2115599
網 址:www.voipblast.net
當前位置:化學成分對奧氏體、鐵素體的影響
[來源:www.voipblast.net] [作者:精密鑄造] [日期:17-03-03]
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.   一、化學成分對奧氏體、鐵素體的影響 One, the chemical composition of the influence of austenite and ferrite  ?。?)碳 是促進奧氏體形成的元素,1份碳相當于30份鎳的作用,但在鋼中極易形成碳化物,隨著C、Cr含量的提高,其金相組織鐵素體易轉變成鐵素體和碳化物、馬氏體或萊氏體。對奧氏體耐腐蝕性能危害極大,一般是在保證強度的前提下,盡量降低含碳量。 (1) is to promote carbon austenite formed elements, 1 the effect of carbon equivalent to 30 nickel, but easy to form carbide in the steel, with the improvement of C, Cr content, the microstructure of ferrite transformation to iron ferrite and carbide, martensite or ledeburite. Great harm on the corrosion resistance of austenitic, is commonly on the premise of guarantee the strength, to reduce the carbon content as much as possible.  ?。?)鉻 是有利于形成鐵素體的元素,是使不銹鋼具有耐腐蝕性能的基本元素。在耐蝕鉻鎳不銹鋼中一般wCr>18%,在鋼中主要作用是具有抗氧化性介質腐蝕的能力。 Chromium (2) is the element is advantageous to the formation of ferrite, is to make the basic elements of stainless steel with corrosion resistance. In corrosion resistance of nickel chromium stainless steel general wCr > 18%, the main effect is in steel has the ability of resistance to oxidation corrosion medium.  ?。?)鎳 是促進奧氏體形成的元素,在鋼中主要作用是對酸、堿非氧化性介質有抗腐蝕能力,一般與其他元素配合使用,使鋼獲得優良的綜合性能。 (3) nickel is promote austenite formation elements, the main role in steel is non oxidizing to acid and alkali medium corrosion resistant ability, generally used together with other elements, make steel excellent comprehensive performance.  ?。?)鉬 是促進鐵素體形成的元素,1份鉬相當于1~1.2份鉻的作用。在鋼中主要作用是提高在高溫工況下抗氧化性腐蝕的能力。 (4) the molybdenum is promote ferrite formation element, 1 copy of chrome molybdenum is equivalent to 1 ~ 1.2. The main role in steel is improved under the condition of high temperature oxidation resistance corrosion ability.  ?。?)鈮 是促進鐵素體形成的元素,1份鈮相當于0.5份鉻的作用。在鋼中主要作用是固化碳,加入量一般是碳的8倍以上。 (5) the niobium is promote ferrite formation elements, 1 copy of niobium is equivalent to 0.5 servings of chromium. Main effect is curing carbon in steel, carbon addition amount is generally more than 8 times.  ?。?)鈦 對奧氏體、鐵素體的形成沒有作用,在鋼中主要作用是固化碳,加入量一般是碳的5倍。 Titanium (6) on the formation of austenite and ferrite is not working, main effect is curing carbon in steel, general carbon is five times the dosage.  ?。?)氮 是強烈形成奧氏體的元素, 1份氮相當于26份鎳的作用,在Cr -Mn -N系不銹鋼中,當wN=0.015%時,鋼的金相組織為鐵素體,當wN=0.13%~0.33%時,鋼的金相組織為鐵素體和奧氏體,當wN=0.58%時,鋼的金相組織可獲得單一的奧氏體。通常氮的加入量是鋼中含鉻量的(1/75)~(1/100),不能超過0.3%,含氮過高往往使鑄件產生氣孔、疏松等缺陷。 Nitrogen (7) is a strong form of austenitic element, 1 N the equivalent of 26 of the effect of nickel, in Cr - Mn - N is stainless steel, when wN = 0.015%, the microstructure of ferritic steel, when wN = 0.13% ~ 0.33%, the steel microstructure of ferrite and austenite, when wN = 0.58%, steel microstructure of single austenite can be obtained. Is usually nitrogen addition amount of chromium content in steel (1/75) ~ (1/100), no more than 0.3%, high nitrogen tend to make the casting defects such as blowholes, osteoporosis.  ?。?)硅 是促進鐵素體形成的元素,1份硅相當于1.5份鉻的作用,在鋼中主要作用改善鋼液流動性,增強脫氧功能。 (8) silicon is promote ferrite formation elements, 1 silicon chromium is equivalent to 1.5, in the main role in steel liquid steel liquidity, strengthen the function of DNA.  ?。?)錳 是促進奧氏體形成的元素,1份錳相當于0.5份鎳的作用,在鋼中主要作用提高鋼液流動性,增強脫硫功能。 Manganese (9) is to promote austenite formed elements, 1 mn is equivalent to 0.5 the effect of nickel, the main role in steel liquidity liquid steel, improve the ability of desulfurization.  ?。?0)其他殘余元素 由于含量很低,可以忽略其他元素影響。 Other residual element (10) Because the content is very low, you can ignore other elements.   鉻鎳不銹鋼化學成分中鉻含量常規高于鎳含量,奧氏體-鐵素體體積含量主要取決于Cr、Ni兩個主要元素的質量分數。對于材料標準中有氮含量要求的鉻鎳不銹鋼,氮含量有較大的影響,實際上其他元素含量少,影響不大。調整鉻當量與鎳當量,主要通過控制投入爐中的Cr、Ni元素合金的質量分數,穩定其他次要影響元素的質量分數,就可以實現鉻鎳不銹鋼中鐵素體含量在規定理想范圍內這個目標。 Chromium content in chromium nickel stainless steel chemical composition of regular higher than that of nickel content, austenitic, ferritic volume content depends mainly on Cr, Ni the mass fraction of two main elements. For material with nitrogen content in the standard requirement of chromium nickel stainless steel and nitrogen content has great influence, in fact the other elements content is less, the impact is not big. Adjust the chromium and nickel equivalent, mainly through the control into the furnace of the mass fraction of Cr, Ni alloy element, stable mass fraction of other minor influence elements, can realize the chromium nickel stainless steel ferrite content within the scope of the provisions of the ideal that goal.
關鍵字:鑄件 不銹鋼
版權所有保定宏晟隆精密鑄造有限公司 網址:www.voipblast.net 保定網站制作:遨游網絡
電話:0312-8928995 傳真:0312-2115599 地址:保定南市區朱莊 推薦:不銹鋼鑄件,精密鑄造,精密鑄件,不銹鋼鑄件價格,精密鑄件加工廠家
友鏈:nsk軸承經銷商 不銹鋼鑄件 隔離墩模具 螺桿式啟閉機 模鍛件 隔離墩鋼模具

保定網站建設及優化保定遨游網絡公司


国产小呦泬泬99精品
<ruby id="p5nvx"><i id="p5nvx"><del id="p5nvx"></del></i></ruby>
<span id="p5nvx"><dl id="p5nvx"></dl></span>
<strike id="p5nvx"><dl id="p5nvx"></dl></strike><span id="p5nvx"><video id="p5nvx"><del id="p5nvx"></del></video></span> <strike id="p5nvx"></strike>
<span id="p5nvx"></span><ruby id="p5nvx"><i id="p5nvx"><del id="p5nvx"></del></i></ruby><ruby id="p5nvx"><ins id="p5nvx"><cite id="p5nvx"></cite></ins></ruby>
<strike id="p5nvx"></strike>
<span id="p5nvx"><video id="p5nvx"></video></span>
<strike id="p5nvx"><video id="p5nvx"><ruby id="p5nvx"></ruby></video></strike>
<strike id="p5nvx"><dl id="p5nvx"></dl></strike><strike id="p5nvx"></strike>
<strike id="p5nvx"></strike>