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.index-module_taskLogo__71Tj5{height:66px;position:absolute;right:30px;top:0;width:66px}.index-module_drawerHand__aRhcO.index-module_open__qMl5O{right:480px}.index-module_reverse__OKr6k{transform:rotate(180deg)}網(wǎng)頁新聞貼吧知道網(wǎng)盤圖片視頻地圖文庫資訊采購百科百度首頁登錄注冊進(jìn)入詞條全站搜索幫助首頁秒懂百科特色百科知識專題加入百科百科團隊權(quán)威合作個人中心收藏查看我的收藏0有用+10309不銹鋼播報討論上傳視頻用于鍋爐、化工等行業(yè)的金屬?309不銹鋼是一種高合金不銹鋼，具有良好的耐高溫和耐腐蝕性能，廣泛應(yīng)用于高溫設(shè)備和管道等領(lǐng)域?。309不銹鋼的主要成分包括碳、硅、錳、磷、硫、鉻和鎳，其中較高的鉻和鎳含量使其能夠在高溫環(huán)境下形成致密的氧化膜，保護鋼材表面不被氧化，從而具有很好的抗腐蝕性?。中文名309不銹鋼特性及用途耐腐蝕性、耐熱性均比0Cr19Ni9好對應(yīng)中國牌號0Cr23Ni13目錄1基本資料2化學(xué)成分3不銹鋼知識?種類?不銹鋼作用?典型用途?表面狀態(tài)?未來展望基本資料播報編輯309不銹鋼。309S不銹鋼--S30908（美國AISI，ASTM） 309S。國際不銹鋼標(biāo)示方法美國鋼鐵學(xué)會是用三位數(shù)字來標(biāo)示各種標(biāo)準(zhǔn)級的可鍛不銹鋼的。其中：①奧氏體型不銹鋼用200和300系列的數(shù)字標(biāo)示，例如，某些較普通的奧氏體不銹鋼 是以302、 304、 316以及310為標(biāo)記， ②鐵素體和馬氏體型不銹鋼用400系列的數(shù)字表示。 ③鐵素體不銹鋼是以430和446為標(biāo)記，馬氏體不銹鋼 是以410、420以及440C為標(biāo) 記，雙相（奧氏體－鐵素體）， ④不銹鋼、沉淀硬化不銹鋼以及含鐵量低于50%的高合金通常是采用專利名稱或商標(biāo)名。化學(xué)成分播報編輯①用國際化學(xué)元素符號和本國的符號來表示化學(xué)成份，用阿拉伯字母來表示成份含量： 如：中國、俄國 12CrNi3A ②用固定位數(shù)數(shù)字來表示鋼類系列或數(shù)字；如：美國、日本、300系、400系、200系； ③用拉丁字母和順序組成序號，只表示用途。 我國的編號規(guī)則 ①采用元素符號 ②用途、漢語拼音，平爐鋼：P、 沸騰鋼：F、 鎮(zhèn)靜鋼：B、甲類鋼：A、T8：特8、 GCr15：滾珠◆合結(jié)鋼、彈簧鋼，如：20CrMnTi 60SiMn、（用萬分之幾表示C含量）◆不銹鋼、合金工具鋼（用千分之幾表示C含量），如：1Cr18Ni9 千分之一（即 0.1%C）,不銹 C≤0.08% 如0Cr18Ni9,超低碳C≤0.03% 如0Cr17Ni13Mo不銹鋼知識播報編輯不銹鋼（Stainless Steel）指耐空氣、蒸汽、水等弱腐蝕介質(zhì)和酸、堿、鹽等化學(xué)浸蝕性介質(zhì)腐蝕的鋼， 又稱不銹耐酸鋼。實際應(yīng)用中，常將耐弱腐蝕介質(zhì)腐蝕的鋼稱為不銹鋼，而將耐化學(xué)介質(zhì)腐蝕的鋼稱為耐酸鋼。由于兩者在化學(xué)成分上的差異，前者不一定耐化學(xué)介質(zhì)腐蝕，而后者則一般均具有不銹性。不銹鋼的耐蝕性取決于鋼中所含的合金元素。種類不銹鋼常按組織狀態(tài)分為：馬氏體鋼、鐵素體鋼、奧氏體鋼等。另外，可按成分分為：鉻不銹鋼、鉻鎳不銹鋼和鉻錳氮不銹鋼等。1、鐵素體不銹鋼：含鉻12%～30%。其耐蝕性、韌性和可焊性隨含鉻量的增加而提高，耐氯化物應(yīng)力腐蝕性能優(yōu)于其他種類不銹鋼。 屬于這一類的有Crl7、Cr17Mo2Ti、Cr25，Cr25Mo3Ti、Cr28等。鐵素體不銹鋼因為含鉻量高，耐腐蝕性能與抗氧化性能均比較好，但機械性能與工藝性能較差，多用于受力不大的耐酸結(jié)構(gòu)及作抗氧化鋼使用。這類鋼能抵抗大氣、硝酸及鹽水溶液的腐蝕，并具有高溫抗氧化性能好、熱膨脹系數(shù)小等特點，用于硝酸及食品工廠設(shè)備，也可制作在高溫下工作的零件，如燃?xì)廨啓C零件等。2、奧氏體不銹鋼：含鉻大于18%，還含有 8%左右的鎳及少量鉬、鈦、氮等元素。綜合性能好，可耐多種介質(zhì)腐蝕。奧氏體不銹鋼的常用牌號有1Cr18Ni9、0Cr19Ni9等。0Cr19Ni9鋼的wC＜0.08%，鋼號中標(biāo)記為“0”。這類鋼中含有大量的Ni和Cr，使鋼在室溫下呈奧氏體狀態(tài)。這類鋼具有良好的塑性、韌性、焊接性和耐蝕性能，在氧化性和還原性介質(zhì)中耐蝕性均較好，用來制作耐酸設(shè)備，如耐蝕容器及設(shè)備襯里、輸送管道、耐硝酸的設(shè)備零件等。奧氏體不銹鋼一般采用固溶處理，即將鋼加熱至1050～1150℃，然后水冷，以獲得單相奧氏體組織。3、奧氏體 - 鐵素體雙相不銹鋼：兼有奧氏體和鐵素體不銹鋼的優(yōu)點，并具有超塑性。 奧氏體和鐵素體組織各約占一半的不銹鋼。在含C較低的情況下，Cr含量在18%~28%，Ni含量在3%~10%。有些鋼還含有Mo、Cu、Si、Nb、Ti，N等合金元素。該類鋼兼有奧氏體和鐵素體不銹鋼的特點，與鐵素體相比，塑性、韌性更高，無室溫脆性，耐晶間腐蝕性能和焊接性能均顯著提高，同時還保持有鐵素體不銹鋼的475℃脆性以及導(dǎo)熱系數(shù)高，具有超塑性等特點。與奧氏體不銹鋼相比，強度高且耐晶間腐蝕和耐氯化物應(yīng)力腐蝕有明顯提高。雙相不銹鋼具有優(yōu)良的耐孔蝕性能，也是一種節(jié)鎳不銹鋼。 4、馬氏體不銹鋼：強度高，但塑性和可焊性較差。 馬氏體不銹鋼的常用牌號有1Cr13、3Cr13等，因含碳較高，故具有較高的強度、硬度和耐磨性，但耐蝕性稍差，用于力學(xué)性能要求較高、耐蝕性能要求一般的一些零件上，如彈簧、汽輪機葉片、水壓機閥等。這類鋼是在淬火、回火處理后使用的。不銹鋼作用不銹鋼不會產(chǎn)生腐蝕、點蝕、銹蝕或磨損。不銹鋼還是建筑用金屬材料中強度最高的材料之一。由于不銹鋼具有良好的耐腐蝕性，所以它能使結(jié)構(gòu)部件永久地保持工程設(shè)計的完整性。含鉻不銹鋼還集機械強度和高延伸性于一身，易于部件的加工制造，可滿足建筑師和結(jié)構(gòu)設(shè)計人員的需要 。典型用途大多數(shù)的使用要求是長期保持建筑物的原有外貌。在確定要選用的不銹鋼類型時，主要考慮的是所要求的審美標(biāo)準(zhǔn)、所在地大氣的腐蝕性以及要采用的清理制度。 然而，其它應(yīng)用越來越多的只是尋求結(jié)構(gòu)的完整性或不透水性。例如，工業(yè)建筑的屋頂和側(cè)墻。在這些應(yīng)用中，物主的建造成本可能比審美更為重要，表面不很干凈也可以。 在干燥的室內(nèi)環(huán)境中使用304不銹鋼效果相當(dāng)好。但是，在鄉(xiāng)村和城市要想在戶外保持其外觀，就需經(jīng)常進(jìn)行清洗。在污染嚴(yán)重的工業(yè)區(qū)和沿海地區(qū)，表面會非常臟，甚至產(chǎn)生銹蝕。但要獲得戶外環(huán)境中的審美效果，就需采用含鎳不銹鋼。所以，304不銹鋼廣泛用于幕墻、側(cè)墻、屋頂及其它建筑用途，但在侵蝕性嚴(yán)重的工業(yè)或海洋大氣中，最好采用316不銹鋼。 不銹鋼拉門，人們已充分認(rèn)識到了在結(jié)構(gòu)應(yīng)用中使用不銹鋼的優(yōu)越性。有幾種設(shè)計準(zhǔn)則中包括了304和316不銹鋼。因為"雙相"不銹鋼2205已把良好的耐大氣腐蝕性能和高抗拉強度及彈限強度融為一體，所以，歐洲準(zhǔn)則中也包括了這種鋼。 產(chǎn)品形狀 實際上，不銹鋼是以全標(biāo)準(zhǔn)的金屬形狀和尺寸生產(chǎn)制造的，而且還有許多特殊形狀。最常用的產(chǎn)品是用薄板和帶鋼制成的，也用中厚板生產(chǎn)特殊產(chǎn)品，例如，生產(chǎn)熱軋結(jié)構(gòu)型鋼和擠壓結(jié)構(gòu)型鋼。而且還有圓型、橢圓型、方型、矩型和六角型焊管或無縫鋼管及其它形式的產(chǎn)品，包括型材、棒材、線材和鑄件。表面狀態(tài)正如后面將談到的，為了滿足建筑師們美學(xué)的要求，已開發(fā)出了多種不同的商用表面加工。例如，表面可以是高反射的或者無光澤的；可以是光面的、拋光的或壓花的；可以是著色的、彩色的、電鍍的或者在不銹鋼表面蝕刻有圖案，也可進(jìn)行拉絲等，以滿足設(shè)計人員對外觀的各種要求。 保持表面狀態(tài)是容易的。只需偶爾進(jìn)行沖洗就能去除灰塵。由于耐腐蝕性良好，也可以容易地去除表面的涂寫污染或類似的其它表面污染。未來展望由于不銹鋼已具備建筑材料所要求的許多理想性能，它在金屬中可以說是獨一無二的，而其發(fā)展仍在繼續(xù)。為使不銹鋼在傳統(tǒng)的應(yīng)用中性能更好，一直在改進(jìn)現(xiàn)有的類型，而且，為了滿足高級建筑應(yīng)用的嚴(yán)格要求，正在開發(fā)新的不銹鋼。由于生產(chǎn)效率不斷提高，質(zhì)量不斷改進(jìn)，不銹鋼已成為建筑師們選擇的最具有成本效益的材料之一。不銹鋼集性能、外觀和使用特性于一身，所以不銹鋼仍將是世界上最佳的建筑材料之一。中國不銹鋼營銷網(wǎng)整合了不銹鋼及不銹鋼供應(yīng)鏈信息的服務(wù)平臺，通過設(shè)立不銹鋼行業(yè)資訊、行業(yè)觀察、企業(yè)管理、不銹鋼設(shè)計、不銹鋼論壇、設(shè)備材料、展會信息、不銹鋼知識、人才招聘等各種欄目，通過最新信息、資料庫、數(shù)據(jù)庫、分析預(yù)測、交流平臺等為會員單位和世界各國用戶，提供中國不銹鋼業(yè)以的信息和咨詢服務(wù)；為不銹鋼業(yè)和相關(guān)產(chǎn)業(yè)提供貿(mào)易信息，尋找商業(yè)機會；傳播不銹鋼文化和家居生活藝術(shù)，提供不銹鋼消費知識。新手上路成長任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問內(nèi)容質(zhì)疑在線客服官方貼吧意見反饋投訴建議舉報不良信息未通過詞條申訴投訴侵權(quán)信息封禁查詢與解封?2024?Baidu?使用百度前必讀?|?百科協(xié)議?|?隱私政策?|?百度百科合作平臺?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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309不銹鋼 309不銹鋼不銹鋼可承受980度以下反復(fù)加熱的耐氧化鋼。加熱爐部件和重油燃燒。鋼廠產(chǎn)的比較多的是309S不銹鋼，耐腐蝕、耐高溫性能較好。可承受980°C高溫。主要用于鍋爐、化工等行業(yè)。309與309S相比，不含硫S含量。309耐蝕性和抗氧化性(1100℃以下)以及高溫強度大，所以，適用于熱處理設(shè)備部件和爐子部件。 309不銹鋼應(yīng)用和特性 309不銹鋼加熱爐部件和重油燃燒。 PRODUCT PARAMETERS 產(chǎn)品參數(shù) 化學(xué)成分 成分 C Si Mn P S Ni Cr 最小值 - - - - - 12 22 最大值 0.2 1 2 0.04 0.03 15 24 物理性能 熔點/℃ 比熱容/kg/(kg.k)℃0~100℃ 熱導(dǎo)率/w/(m.k)100~500℃ 線脹系數(shù)/(10-6/k)100~500℃ 電阻率/（Ω.mm2/m)20℃ 縱向彈性模量/GPa20℃ 密度g/cm 硬度HBW 磁性 1398~1453 0.5 13.8~18.7 14.9~18 0.78 200 7.98 固溶269 無
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