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個(gè)人中心收藏查看我的收藏0有用+10合金結(jié)構(gòu)鋼播報(bào)討論上傳視頻熱處理性能優(yōu)良的鋼材展開3個(gè)同名詞條同義詞40CrNi2Mo（在優(yōu)質(zhì)碳素結(jié)構(gòu)鋼的基礎(chǔ)上，適當(dāng)?shù)丶尤胍环N或數(shù)種合金元素而制成的鋼種）一般指合金結(jié)構(gòu)鋼（熱處理性能優(yōu)良的鋼材）本詞條由“科普中國(guó)”科學(xué)百科詞條編寫與應(yīng)用工作項(xiàng)目 審核 。合金結(jié)構(gòu)鋼（structural alloy steel）是指用作機(jī)械零件和各種工程構(gòu)件并含有一種或數(shù)種一定量的合金元素的鋼。中文名合金結(jié)構(gòu)鋼
外文名Alloy structure steels
學(xué)    科材料工程
領(lǐng)    域工程技術(shù)

目錄
1簡(jiǎn)介2合金元素作用3分類4生產(chǎn)工藝5中國(guó)標(biāo)準(zhǔn)6相關(guān)概念?結(jié)構(gòu)鋼?合金鋼7其他信息
簡(jiǎn)介
播報(bào)編輯合金結(jié)構(gòu)鋼由于具有合適的淬透性，經(jīng)適宜的金屬熱處理后，顯微組織為均勻的索氏體、貝氏體或極細(xì)的珠光體，因而具有較高的抗拉強(qiáng)度和屈強(qiáng)比（一般在0.85左右），較高的韌性和疲勞強(qiáng)度，和較低的韌性－脆性轉(zhuǎn)變溫度，可用于制造截面尺寸較大的機(jī)器零件 [1]。
合金元素作用
播報(bào)編輯有三個(gè)方面：①增大鋼的淬透性。淬透性是指鋼淬火時(shí)，從表層起淬成馬氏體層的深度，是取得良好綜合性能的主要參數(shù)。除Co外，幾乎所有合金元素如 Mn、Mo、Cr、Ni、Si和C、N、B等都能提高鋼的淬透性，其中 Mn、Mo、Cr、B的作用最強(qiáng)，其次是Ni、Si、Cu。而強(qiáng)碳化物形成元素如 V、Ti、Nb等，只有溶于奧氏體中時(shí)才能增大鋼的淬透性。②影響鋼的回火過(guò)程。由于合金元素在回火時(shí)能阻礙鋼中各種原子的擴(kuò)散，因而在同樣溫度下和碳素鋼相比，一般均起到延遲馬氏體的分解和碳化物的聚集長(zhǎng)大作用，從而提高鋼的回火穩(wěn)定性,即提高鋼的抗回火軟化能力,V、W、Ti、Cr、Mo、Si的作用比較顯著，Al、Mn、Ni的作用不明顯。含有較高含量的碳化物形成元素如V、W、Mo等的鋼，在500～600℃回火時(shí)，析出細(xì)小彌散的特殊碳化物質(zhì)點(diǎn)如V4C3、Mo2C、W2C等，代替部分較粗大的合金滲碳體，使鋼的強(qiáng)度不再下降反而升高,即出現(xiàn)二次硬化。Mo對(duì)鋼的回火脆性有阻止或減弱的作用。③影響鋼的強(qiáng)化和韌化。Ni以固溶強(qiáng)化方式強(qiáng)化鐵素體；Mo、V、Nb等碳化物形成元素,既以彌散硬化方式又以固溶強(qiáng)化方式提高鋼的屈服強(qiáng)度；碳的強(qiáng)化作用最顯著。此外，加入這些合金元素，一般都細(xì)化奧氏體晶粒，增加晶界的強(qiáng)化作用。影響鋼的韌性因素比較復(fù)雜，Ni改善鋼的韌性；Mn易使奧氏體晶粒粗化，對(duì)回火脆性敏感；降低P、S含量，提高鋼的純凈度，對(duì)改善鋼的韌性有重要作用 [2]。
分類
播報(bào)編輯合金結(jié)構(gòu)鋼一般分為調(diào)質(zhì)結(jié)構(gòu)鋼和表面硬化結(jié)構(gòu)鋼。①調(diào)質(zhì)結(jié)構(gòu)鋼 這類鋼的含碳量一般約為0.25%～0.55%，對(duì)于既定截面尺寸的結(jié)構(gòu)件，在調(diào)質(zhì)處理（淬火加回火）時(shí)，如果沿截面淬透，則力學(xué)性能良好，如果淬不透，顯微組織中出現(xiàn)有自由鐵素體，則韌性下降。對(duì)具有回火脆性傾向的鋼如錳鋼、鉻鋼、鎳鉻鋼等，回火后應(yīng)快冷。這類鋼的淬火臨界直徑，隨晶粒度和合金元素含量的增加而增大，例如，40Cr和35SiMn鋼約為30～40mm，而40CrNiMo和30CrNi2MoV鋼則約為 60～100mm，常用于制造承受較大載荷的軸、連桿等結(jié)構(gòu)件。②表面硬化結(jié)構(gòu)鋼 用以制造表層堅(jiān)硬耐磨而心部柔韌的零部件,如齒輪、軸等。為使零件心部韌性高,鋼中含碳量應(yīng)低，一般在0.12～0.25%，同時(shí)還有適量的合金元素，以保證適宜的淬透性。氮化鋼還需加入易形成氮化物的合金元素（如Al、Cr、Mo等）。滲碳或碳氮共滲鋼，經(jīng)850～950℃滲碳或碳氮共滲后，淬火并在低溫回火(約200℃)狀態(tài)下使用。氮化鋼經(jīng)氮化處理(480～580℃)，直接使用，不再經(jīng)淬火與回火處理。
生產(chǎn)工藝
播報(bào)編輯根據(jù)鋼種和鋼的質(zhì)量要求，合金結(jié)構(gòu)鋼的冶煉，可采用氧氣頂吹轉(zhuǎn)爐、平爐、電弧爐；或再加電渣重熔、真空除氣。鑄錠可采用連鑄或模鑄。鋼錠應(yīng)緩慢冷卻或熱送鍛造、軋制。鋼錠加熱時(shí)，應(yīng)力求溫度均勻并有足夠的保溫時(shí)間，以改善偏析缺陷和避免鍛、軋時(shí)變形不均勻；鍛、軋后的鋼材，尺寸小的、特別是含碳0.2%左右的滲碳鋼，在600℃以上時(shí)應(yīng)快速冷卻,以免加重帶狀組織；截面較大的鍛件，應(yīng)采取措施消除內(nèi)應(yīng)力和白點(diǎn)。調(diào)質(zhì)鋼應(yīng)盡可能淬火成馬氏體組織，然后回火成索氏體組織；滲碳鋼在滲碳過(guò)程中，滲層濃度梯度不宜過(guò)大,以免在滲層晶界上出現(xiàn)連續(xù)網(wǎng)狀碳化物;氮化鋼必需先經(jīng)熱處理得到所需的性能，再經(jīng)最后精加工才能進(jìn)行氮化。氮化處理后除將脆薄的“白層”研磨除去外，不再加工 [1]。
中國(guó)標(biāo)準(zhǔn)
播報(bào)編輯標(biāo)準(zhǔn)號(hào) StandardNo：GB/T 3077-1999首次發(fā)布日期FirstIssuance Date ：1982-05-10標(biāo)準(zhǔn)狀態(tài)StandardState ：現(xiàn)行復(fù)審確認(rèn)日期ReviewAffirmance Date :2010-07-28計(jì)劃編號(hào)Plan No：代替國(guó)標(biāo)號(hào)ReplacedStandard ：GB/T 3077-1988被代替國(guó)標(biāo)號(hào)ReplacedStandard:廢止時(shí)間RevocatoryDate :采用國(guó)際標(biāo)準(zhǔn)號(hào)AdoptedInternational Standard No：采標(biāo)名稱AdoptedInternational Standard Name：DIN EN 10083-1:1991采用程度ApplicationDegree ： NEQ采用國(guó)際標(biāo)準(zhǔn)AdoptedInternational Standard ：其他國(guó)際標(biāo)準(zhǔn)分類號(hào)(ICS) ：75.140.20中國(guó)標(biāo)準(zhǔn)分類號(hào)(CCS) ：H40標(biāo)準(zhǔn)類別StandardSort：基礎(chǔ)標(biāo)準(zhǔn)頁(yè)碼Number ofPages:標(biāo)準(zhǔn)價(jià)格(元)Price(￥) :主管部門Governor ：中國(guó)鋼鐵工業(yè)協(xié)會(huì)歸口單位TechnicalCommittees ：全國(guó)鋼標(biāo)準(zhǔn)化技術(shù)委員會(huì)起草單位DraftingCommittee：大冶特殊鋼股份有限公司
相關(guān)概念
播報(bào)編輯結(jié)構(gòu)鋼結(jié)構(gòu)鋼是指符合特定強(qiáng)度和可成形性等級(jí)的鋼?？沙尚涡砸钥估囼?yàn)中斷后伸長(zhǎng)率表示。結(jié)構(gòu)鋼一般用于承載等用途，在這些用途中鋼的強(qiáng)度是一個(gè)重要設(shè)計(jì)標(biāo)準(zhǔn)。結(jié)構(gòu)鋼可以細(xì)分為：合金結(jié)構(gòu)鋼、碳素結(jié)構(gòu)鋼、低合金結(jié)構(gòu)鋼、耐熱結(jié)構(gòu)鋼等等。合金鋼合金鋼 alloy steel 鋼里除鐵、碳外，加入其他的合金元素，就叫合金鋼。 在普通碳素鋼基礎(chǔ)上添加適量的一種或多種合金元素而構(gòu)成的鐵碳合金。根據(jù)添加元素的不同，并采取適當(dāng)?shù)募庸すに嚕色@得高強(qiáng)度、高韌性、耐磨、耐腐蝕、耐低溫、耐高溫、無(wú)磁性等特殊性能 [3]。
其他信息
播報(bào)編輯可分為普通合金結(jié)構(gòu)鋼和特殊用途合金結(jié)構(gòu)鋼。前者包括低合金高強(qiáng)度鋼、低溫用鋼、超高強(qiáng)度鋼、滲碳鋼、調(diào)質(zhì)鋼和非調(diào)質(zhì)鋼；后者包括彈簧鋼、滾珠軸承鋼、易切削鋼、冷沖壓鋼等。要求具有較高的屈服強(qiáng)度、抗拉強(qiáng)度和疲勞強(qiáng)度，還有足夠的塑性和韌性。一般采用電弧爐和氧氣頂吹轉(zhuǎn)爐冶煉，要求高的采用爐外精煉、電渣重熔或真空處理、真空感應(yīng)爐冶煉或雙真空冶煉、合適的熱處理。這類鋼的合金元素含量都相當(dāng)高，主要有耐蝕鋼、耐熱鋼、耐磨鋼、磁鋼以及具有其他特殊物理和化學(xué)性能的特殊鋼。合金結(jié)構(gòu)鋼廣泛用于船舶、車輛、飛機(jī)、導(dǎo)彈、兵器、鐵路、橋梁、壓力容器、機(jī)床等結(jié)構(gòu)上。合金結(jié)構(gòu)鋼比碳素鋼有更好的力學(xué)性能，特別是熱處理性能優(yōu)良。其牌號(hào)通常是以“數(shù)字+元素符號(hào)+數(shù)字”的方法來(lái)表示。牌號(hào)中起首的兩位數(shù)字表示鋼的平均含碳量的萬(wàn)分?jǐn)?shù)，元素符號(hào)及其后的數(shù)字表示所含合金元素及其平均含量的百分?jǐn)?shù)。若合金元素含量小于1.5%，則不標(biāo)其含量。高級(jí)優(yōu)質(zhì)鋼在牌號(hào)尾部增加符號(hào)“A”例如，16Mn、20Cr、40Mn2、30CrMnSi、38CrMoAlA等 [2]。合金結(jié)構(gòu)鋼細(xì)分類與統(tǒng)一數(shù)字代號(hào)：統(tǒng)一數(shù)字代號(hào)合金結(jié)構(gòu)鋼(包括合金彈簧鋼)細(xì)分類AO××××Mn(X)、MnMo(X)系鋼Al××××SiMn(X)、SiMnMo(X)系鋼A2××××Cr(X)、CrSi(X)、CrMn(X)、CrV(x)、CrMnSi(X)系鋼A3××××CrMo(X)、CrMoV(X)系鋼A4××××CrNi(X)系鋼A5××××CrNiMo(X)、CrNiW(X)系鋼A6××××Ni(X)、NiMo(X)、NiCoMo(X)、Mo(X)、MoWV(X)系鋼A7××××B(X)、MnB(X)、SiMnB(X)系鋼A8××××(暫空)A9××××其他合金結(jié)構(gòu)鋼新手上路成長(zhǎng)任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問(wèn)內(nèi)容質(zhì)疑在線客服官方貼吧意見反饋投訴建議舉報(bào)不良信息未通過(guò)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(tái)?|?京ICP證030173號(hào)?京公網(wǎng)安備11000002000001號(hào)window.PAGE_DATA= 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：≤269HB試樣尺寸：試樣毛坯尺寸為25mm熱處理規(guī)范及金相組織熱處理規(guī)范：淬火850℃,油冷;回火600℃,水冷、油冷。交貨狀態(tài)以熱處理（正火、退火或高溫回火）或不熱處理狀態(tài)交貨，交貨狀態(tài)應(yīng)在合同中注明。鋼號(hào)表示方法概述鋼的牌號(hào)簡(jiǎn)稱鋼號(hào)，是對(duì)每一種具體鋼產(chǎn)品所取的名稱，是人們了解鋼的一種共同語(yǔ)言。我國(guó)的鋼號(hào)表示方法，根據(jù)國(guó)家標(biāo)準(zhǔn)《鋼鐵產(chǎn)品牌號(hào)表示方法》（GB221-79）中規(guī)定，采用漢語(yǔ)拼音字母、化學(xué)元素符號(hào)和阿拉伯?dāng)?shù)字相結(jié)合的方法表示。即：①鋼號(hào)中化學(xué)元素采用國(guó)際化學(xué)符號(hào)表示，例如Si,Mn,Cr……等?；旌舷⊥猎赜肦E（或Xt）表示。②產(chǎn)品名稱、用途、冶煉和澆注方法等，一般采用漢語(yǔ)拼音的縮寫字母表示。③鋼中主要化學(xué)元素含量（%）采用阿拉伯?dāng)?shù)字表示。