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45#碳素鋼特種鋼板-碳素鋼/模具鋼系列
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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(yè)新聞貼吧知道網(wǎng)盤(pán)圖片視頻地圖文庫(kù)資訊采購(gòu)百科百度首頁(yè)登錄注冊(cè)進(jìn)入詞條全站搜索幫助首頁(yè)秒懂百科特色百科知識(shí)專題加入百科百科團(tuán)隊(duì)權(quán)威合作個(gè)人中心45播報(bào)討論上傳視頻自然數(shù)展開(kāi)3個(gè)同名詞條收藏查看我的收藏0有用+1045（forty-five）是44與46之間的自然數(shù)，也是奇數(shù)，合數(shù)，大寫(xiě)為肆拾伍。中文名45外文名forty-five讀 法四十五性 質(zhì)自然數(shù)大 寫(xiě)肆拾伍拼 音sì shí wǔ韓 文???目錄1數(shù)學(xué)領(lǐng)域?基本信息?數(shù)學(xué)性質(zhì)?倍數(shù)表2科學(xué)領(lǐng)域3其它領(lǐng)域4網(wǎng)絡(luò)用語(yǔ)數(shù)學(xué)領(lǐng)域播報(bào)編輯基本信息大寫(xiě)：肆拾伍拼音：sì shí wǔ英文：forty-five數(shù)字類型：正整數(shù)、自然數(shù)、奇數(shù)（單數(shù)）、合數(shù)質(zhì)因數(shù)的分解：3×3×5因數(shù)：1, 3, 5, 9, 15, 45相反數(shù)：-45倒數(shù)：1/45負(fù)倒數(shù)：-1/45由于1+3+5+9+15=33＜45,所以45是一個(gè)虧數(shù)。羅馬數(shù)字：XLV二進(jìn)制：101101三進(jìn)制：1200四進(jìn)制：231八進(jìn)制：55十六進(jìn)制：2D數(shù)學(xué)性質(zhì)第30個(gè)合數(shù)，正約數(shù)有1、3、5、9、15和45。前一個(gè)為44、下一個(gè)為46。第35個(gè)虧數(shù)，真約數(shù)和為33，虧度為12。前一個(gè)為44、下一個(gè)為46。第21個(gè)十進(jìn)制的哈沙德數(shù)。前一個(gè)為42、下一個(gè)為48。第21個(gè)十進(jìn)制的奢侈數(shù)。前一個(gè)為44、下一個(gè)為46。三角形數(shù)、六邊形數(shù)、十六邊形數(shù)卡布列克數(shù)45是32與62的和。乘法口訣：五九四十五倍數(shù)表乘數(shù)乘積145290313541805225627073158360940510450114951254013585146301567516720177651881019855209002194522990231,035241,080251,125261,170271,215281,260291,305301,350311,395321,440……科學(xué)領(lǐng)域播報(bào)編輯銠的原子序數(shù)其它領(lǐng)域播報(bào)編輯丹麥的國(guó)際電話區(qū)號(hào)結(jié)婚45年稱為藍(lán)寶石婚年一種留聲機(jī)的記錄類型，其轉(zhuǎn)速45轉(zhuǎn)每分鐘黑人說(shuō)唱中 經(jīng)常有 “45”一詞 意思是 45自動(dòng)式手槍中華人民共和國(guó)的居民身份證（廣西壯族自治區(qū)開(kāi)頭的代號(hào)）在機(jī)械設(shè)計(jì)中，45是“45號(hào)鋼”的簡(jiǎn)稱。網(wǎng)絡(luò)用語(yǔ)播報(bào)編輯45=失誤世界最偉大的籃球運(yùn)動(dòng)員--邁克爾喬丹~曾用過(guò)的球衣號(hào)45=死尸巫泓昊網(wǎng)絡(luò)用語(yǔ)中45也常諧音做師父的意思新手上路成長(zhǎng)任務(wù)編輯入門(mén)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(jiàn)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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45鋼是GB中的叫法，也叫“油鋼”。市場(chǎng)現(xiàn)貨熱軋居多；冷軋規(guī)格1.0~4.0mm（毫米）之間。該鋼冷塑性一般，退火、正火比調(diào)質(zhì)時(shí)要稍好，具有較高的強(qiáng)度和較好的切削加工性。特性常用中碳調(diào)質(zhì)結(jié)構(gòu)鋼。該鋼冷塑性一般，退火、正火比調(diào)質(zhì)時(shí)要稍好，具有較高的強(qiáng)度和較好的切削加工性，經(jīng)適當(dāng)?shù)臒崽幚硪院罂色@得一定的韌性、塑性和耐磨性，材料來(lái)源方便。適合于氫焊和氬弧焊，不太適合于氣焊。焊前需預(yù)熱，焊后應(yīng)進(jìn)行去應(yīng)力退火。正火可改善硬度小于160HBS毛坯的切削性能。該鋼經(jīng)調(diào)質(zhì)處理后，其綜合力學(xué)性能要優(yōu)化于其他中碳結(jié)構(gòu)鋼，但該鋼淬透性較低，水中臨界淬透直徑為12~17mm，水淬時(shí)有開(kāi)裂傾向。當(dāng)直徑大于80mm時(shí)，經(jīng)調(diào)質(zhì)或正火后，其力學(xué)性能相近，對(duì)中、小型模具零件進(jìn)行調(diào)質(zhì)處理后可獲得較高的強(qiáng)度和韌性，而大型零件，則以正火處理為宜，所以，此鋼通常在調(diào)質(zhì)或正火狀態(tài)下使用。液相線溫度1495℃左右，碳含量0.42~0.50%。參考對(duì)應(yīng)鋼號(hào)：中國(guó)GB標(biāo)準(zhǔn)鋼號(hào)45；日本JIS標(biāo)準(zhǔn)鋼號(hào)S45C/S48C；德國(guó)DIN標(biāo)準(zhǔn)材料鋼號(hào)1.0503；德國(guó)DIN標(biāo)準(zhǔn)鋼號(hào)C45；英國(guó)BS標(biāo)準(zhǔn)鋼號(hào)IC45/080A47；法國(guó)AFNOR標(biāo)準(zhǔn)鋼號(hào)CC45；法國(guó)NF標(biāo)準(zhǔn)鋼號(hào)C45；意大利UNI標(biāo)準(zhǔn)鋼號(hào)C45；比利時(shí)NBN標(biāo)準(zhǔn)鋼號(hào)C45-1；瑞典SS標(biāo)準(zhǔn)鋼號(hào)1650；西班牙標(biāo)準(zhǔn)鋼號(hào)F.114；美國(guó)AISI/SAE標(biāo)準(zhǔn)鋼號(hào)1045；國(guó)際標(biāo)準(zhǔn)化組織ISO標(biāo)準(zhǔn)鋼號(hào)C45E4。力學(xué)性能正火：850 ??；淬火：840 ；回火：600 ?。豢估瓘?qiáng)度：不小于600Mpa ?。磺?qiáng)度：不小于355Mpa ??；伸長(zhǎng)率：16 [1] % ??；收縮率：40% ??；沖擊功：39J ；鋼材交貨狀態(tài)硬度 [1] ：熱軋鋼：≤229HB退火鋼：≤197HB成分主要成分為 Fe（鐵元素），且含有以下少量元素：C：0.42~0.50%Si：0.17~0.37%Mn：0.50~0.80%P： ≤0.035%S： ≤0.035%Cr：≤0.25%Ni：≤0.25%Cu：≤0.25% [1] 密度7.85g/cm3，彈性模量210GPa，泊松比0.269。處理方法熱處理推薦熱處理溫度：正火850，淬火840，回火600。45號(hào)鋼淬火后沒(méi)有回火之前，硬度大于HRC55（最高可達(dá)HRC62)為合格。實(shí)際應(yīng)用的最高硬度為HRC55（高頻淬火HRC58)。2.45號(hào)鋼不要采用滲碳淬火的熱處理工藝。滲碳處理一般用于表面耐磨、芯部耐沖擊的重載零件，其耐磨性比調(diào)質(zhì)+表面淬火高。其表面含碳量0.8－－1.2%，芯部一般在0.1－－0.25%（特殊情況下采用0.35%）。經(jīng)熱處理后，表面可以獲得很高的硬度(HRC58－－62)，芯部硬度低，耐沖擊。如果用45號(hào)鋼滲碳，淬火后芯部會(huì)出現(xiàn)硬脆的馬氏體，失去滲碳處理的優(yōu)點(diǎn)。采用滲碳工藝的材料，含碳量都不高，到0.30%芯部強(qiáng)度已經(jīng)可以達(dá)到很高，應(yīng)用上不多見(jiàn)。0.35%從來(lái)沒(méi)見(jiàn)過(guò)實(shí)例，只在教科書(shū)里有介紹?？梢圆捎谜{(diào)質(zhì)+高頻表面淬火的工藝，耐磨性較滲碳略差。加工處理規(guī)范冷壓毛胚軟化處理規(guī)范：溫度740~760℃，保溫時(shí)間4~6h，以50~100℃/h的冷速，隨爐降至溫度≤600℃，出爐空冷，處理前硬度≤197HBS，處理后硬度≤156HBS。正火規(guī)范：正火溫度850-870℃，正火后硬度170-217HBS。調(diào)質(zhì)處理規(guī)范：淬火溫度840±10℃，水冷淬火；回火溫度600±10℃，出爐空冷。執(zhí)行標(biāo)準(zhǔn)中GB/T699-1999標(biāo)準(zhǔn)規(guī)定的45鋼推薦熱處理溫度為850℃正火、840℃淬火、600℃回火，達(dá)到的性能為屈服強(qiáng)度≥355MPaGB/T699-1999標(biāo)準(zhǔn)規(guī)定45鋼抗拉強(qiáng)度≥600MPa，屈服強(qiáng)度≥355MPa，伸長(zhǎng)率≥16%，斷面收縮率≥40%，沖擊功為39J。處理要求45鋼調(diào)質(zhì)硬度在HRC20~HRC30之間；45鋼淬火硬度在HRC55~58之間,極限值可達(dá)HRC62；45鋼要放置15-20天才能使用,是因?yàn)橐M(jìn)行時(shí)效處理,使鋼的性能穩(wěn)定下來(lái)，實(shí)際應(yīng)用的最高硬度為HRC55（高頻淬火HRC58）。45鋼為優(yōu)質(zhì)碳素結(jié)構(gòu)用鋼，硬度不高易切削加工，模具中常用來(lái)做模板，梢子，導(dǎo)柱等，但須熱處理 。45鋼淬火后沒(méi)有回火之前，硬度大于HRC55（最高可達(dá)HRC62）為合格。實(shí)際應(yīng)用的最高硬度為HRC55（高頻淬火HRC58）。2. 45鋼不要采用滲碳淬火的熱處理工藝。調(diào)質(zhì)處理后零件具有良好的綜合機(jī)械性能，廣泛應(yīng)用于各種重要的結(jié)構(gòu)零件，特別是那些在交變負(fù)荷下工作的連桿、螺栓、齒輪及軸類等。但表面硬度較低，不耐磨?？捎谜{(diào)質(zhì)+表面淬火提高零件表面硬度。用途軸類零件特點(diǎn)軸類零件是機(jī)器中經(jīng)常遇到的典型零件之一。它主要用來(lái)支承傳動(dòng)零部件，傳遞扭矩和承受載荷。軸類零件是旋轉(zhuǎn)體零件，其長(zhǎng)度大于直徑，一般由同心軸的外圓柱面、圓錐面、內(nèi)孔和螺紋及相應(yīng)的端面所組成。根據(jù)結(jié)構(gòu)形狀的不同，軸類零件可分為光軸、階梯軸、空心軸和曲軸等。軸的長(zhǎng)徑比小于5的稱為短軸，大于20的稱為細(xì)長(zhǎng)軸，大多數(shù)軸介于兩者之間。軸用軸承支承，與軸承配合的軸段稱為軸頸。軸頸是軸的裝配基準(zhǔn)，它們的精度和表面質(zhì)量一般要求較高，其技術(shù)要求一般根據(jù)軸的主要功用和工作條件制定，通常有以下幾項(xiàng)：（一）尺寸精度 起支承作用的軸頸為了確定軸的位置，通常對(duì)其尺寸精度要求較高(IT5～I(xiàn)T7)。裝配傳動(dòng)件的軸頸尺寸精度一般要求較低(IT6～I(xiàn)T9)。（二）幾何形狀精度 軸類零件的幾何形狀精度主要是指軸頸、外錐面、莫氏錐孔等的圓度、圓柱度等，一般應(yīng)將其公差限制在尺寸公差范圍內(nèi)。對(duì)精度要求較高的內(nèi)外圓表面，應(yīng)在圖紙上標(biāo)注其允許偏差。（三）相互位置精度 軸類零件的位置精度要求主要是由軸在機(jī)械中的位置和功用決定的。通常應(yīng)保證裝配傳動(dòng)件的軸頸對(duì)支承軸頸的同軸度要求，否則會(huì)影響傳動(dòng)件（齒輪等）的傳動(dòng)精度，并產(chǎn)生噪聲。普通精度的軸，其配合軸段對(duì)支承軸頸的徑向跳動(dòng)一般為0.01～0.03mm,高精度軸（如主軸）通常為0.001～0.005mm。（四）表面粗糙度 一般與傳動(dòng)件相配合的軸徑表面粗糙度為Ra2.5～0.63μm,與軸承相配合的支承軸徑的表面粗糙度為Ra0.63～0.16μm。毛坯和材料（一）軸類零件的毛坯 軸類零件可根據(jù)使用要求、生產(chǎn)類型、設(shè)備條件及結(jié)構(gòu)，選用棒料、鍛件等毛坯形式。對(duì)于外圓直徑相差不大的軸，一般以棒料為主；而對(duì)于外圓直徑相差大的階梯軸或重要的軸，常選用鍛件，這樣既節(jié)約材料又減少機(jī)械加工的工作量，還可改善機(jī)械性能。根據(jù)生產(chǎn)規(guī)模的不同，毛坯的鍛造方式有自由鍛和模鍛兩種。中小批生產(chǎn)多采用自由鍛，大批大量生產(chǎn)時(shí)采用模鍛。（二）軸類零件的材料 軸類零件應(yīng)根據(jù)不同的工作條件和使用要求選用不同的材料并采用不同的熱處理規(guī)范（如調(diào)質(zhì)、正火、淬火等），以獲得一定的強(qiáng)度、韌性和耐磨性。45鋼是軸類零件的常用材料，它價(jià)格便宜經(jīng)過(guò)調(diào)質(zhì)（或正火）后，可得到較好的切削性能，而且能獲得較高的強(qiáng)度和韌性等綜合機(jī)械性能，淬火后表面硬度可達(dá)45～52HRC。40Cr等合金結(jié)構(gòu)鋼適用于中等精度而轉(zhuǎn)速較高的軸類零件，這類鋼經(jīng)調(diào)質(zhì)和淬火后，具有較好的綜合機(jī)械性能。軸承鋼GCr15和彈簧鋼65Mn,經(jīng)調(diào)質(zhì)和表面高頻淬火后，表面硬度可達(dá)50～58HRC,并具有較高的耐疲勞性能和較好的耐磨性能，可制造較高精度的軸。精密機(jī)床的主軸（例如磨床砂輪軸、坐標(biāo)鏜床主軸）可選用38CrMoAIA氮化鋼。這種鋼經(jīng)調(diào)質(zhì)和表面氮化后，不僅能獲得很高的表面硬度，而且能保持較軟的芯部，因此耐沖擊韌性好。與滲碳淬火鋼比較，它有熱處理變形很小，硬度更高的特性。45號(hào)鋼廣泛用于機(jī)械制造，這種鋼的機(jī)械性能很好。但是這是一種中碳鋼，淬火性能并不好， 45號(hào)鋼可以淬硬至HRC42~46。所以如果需要表面硬度，又希望發(fā)揮45#鋼優(yōu)越的機(jī)械性能，常將45#鋼表面淬火（高頻淬火或者直接淬火），這樣就能得到需要的表面硬度。注：直徑為8―12mm的45號(hào)鋼淬火時(shí)容易產(chǎn)生裂紋，這是一個(gè)較為復(fù)雜的問(wèn)題。采取的措施是淬火時(shí)試樣在水中快速攪動(dòng)，或者采用油冷，可避免出現(xiàn)裂紋。在模具修補(bǔ)領(lǐng)域45號(hào)鋼所針對(duì)的模具焊材型號(hào)為：CMC-E45它是唯一接合性較好之中硬度鋼焊條，適用于空冷鋼、鑄鋼：如ICD5、7CrSiMnMoV…等等。汽車(chē)板金覆蓋件模具及大型五金板金沖壓模具之拉延、拉伸部位修補(bǔ)，也可用于硬面制作。另外在使用時(shí)也有一些需要注意的：1. 于潮濕場(chǎng)地施工前，焊條先以150-200°C烘干30-50分鐘。2. 通常施以200°C以上預(yù)熱，焊接后空冷，可能的話最好實(shí)施應(yīng)力消除。3. 需多層堆焊處，以CMC-E30N打底，可得到較好的焊接效果。硬度 HRC 48-52主要成份 Cr Si Mn C適用電流范圍：直徑及長(zhǎng)度m/m 3.2*350mm 4.0*350mm電流范圍(Amp) 70-100 130-150
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