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.block-item .block-title{color:#333;font-size:20px;line-height:1.5}.page-footer-content .block-item .block-title svg{color:#aaa;margin-right:10px}.page-footer-content .block-item .block-content{padding:5px 0 0 30px;width:210px}.page-footer-content .block-item .block-content>a{color:#666;cursor:pointer;float:left;margin-bottom:5px;position:relative;-webkit-text-decoration:none;text-decoration:none;width:90px}.page-footer-content .block-item .block-content>a:hover{color:#338de6;-webkit-text-decoration:none;text-decoration:none}.page-footer-content .block-item .block-content .block-content-new-icon{height:7px;left:52px;position:absolute;top:3px}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(cè)進(jìn)入詞條全站搜索幫助首頁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)人中心收藏查看我的收藏0有用+1015CrMo播報(bào)討論上傳視頻耐熱鋼15CrMo鋼系珠光體組織耐熱鋼，在高溫下具有較高的熱強(qiáng)性（δb≥440MPa）和抗氧化性，并具有一定的抗氫腐蝕能力。由于鋼中含有較高含量的Cr、C和其它合金元素，鋼材的淬硬傾向較明顯，焊接性差。中文名15CrMo特 點(diǎn)有較高的熱強(qiáng)性和抗氧化性執(zhí)行標(biāo)準(zhǔn)GB/T 3077-2006鋼板標(biāo)準(zhǔn)GB/T11251-2009目錄1執(zhí)行標(biāo)準(zhǔn)2焊接性?焊接材料?試驗(yàn)結(jié)果3焊接工藝4評(píng)定試驗(yàn)5表面熱處理6化學(xué)成分7力學(xué)性能8應(yīng)用舉例9現(xiàn)貨規(guī)格執(zhí)行標(biāo)準(zhǔn)播報(bào)編輯GB/T 3077-2015 鋼板標(biāo)準(zhǔn)GB/T11251-2009。焊接性播報(bào)編輯焊接材料針對(duì)15CrMo鋼的焊接性的工作特點(diǎn)，根據(jù)以往的經(jīng)驗(yàn)，參照國外提供的焊接工藝卡，選擇兩種方案進(jìn)行焊接試驗(yàn)。方案Ⅰ：焊接預(yù)熱，采用ER80S-B2L焊絲，TIG焊打底，E8018-B2焊條，焊條電弧焊蓋面，焊后進(jìn)行局部熱處理。方案Ⅱ：采用ER80S-B2L焊絲，TIG焊打底，E309Mo-16焊條，焊條填充電弧焊蓋面，焊后不進(jìn)行熱處理。焊絲和焊條的化學(xué)成分及力學(xué)性能見表1。試驗(yàn)結(jié)果試驗(yàn)方案 拉伸試驗(yàn) 彎曲試驗(yàn)沖擊韌性試驗(yàn)aky（J/cm2）抗拉強(qiáng)度δb/Mpa 斷裂部位 彎曲角度 面彎 背彎 焊縫 熔合線 熱影響區(qū)(HAZ)方案Ⅰ 550/530 母材 50。 合格 合格 84.8 162 135.6方案Ⅱ 525/520 母材 50。 合格 合格 79.4 109.2 96.7焊接工藝播報(bào)編輯方案Ⅰ：焊接預(yù)熱，采用ER80S-B2L焊絲，TiG焊打底。E8018-B2焊條，焊條電弧焊蓋面，焊后進(jìn)行局部熱處理。方案Ⅱ：采用ER80S-B2L焊絲，TiG焊打底。E309Mo-16焊條，焊條填充電弧焊蓋面，焊后不進(jìn)行熱處理。焊絲和焊條的化學(xué)成分及力學(xué)性能見表1。表1 焊接材料的化學(xué)成分和力學(xué)性能型號(hào) C Mn Si Cr Ni Mo S P δb/Mpa δ,% ;ER80S-B2L≤0.05 0.70.41.2 ＜0.20.5 ≤0.025 ≤0.025 ≤500 25 ;E8018-B2 0.070.7 0.3 1.1 0.5 ≤0.04 ≤0.03 550 19 ;E309Mo-16≤0.12 0.5～2.5 0.9 22.0～25.0 12.0～14.0 2.0～3.0≤0.025≤0.035 550 25 ;焊前準(zhǔn)備試件采用15CrMo鋼管,規(guī)格為φ325×25，坡口型式及尺寸見圖1。焊前用角向磨光機(jī)將坡口內(nèi)外及坡口邊緣50mm范圍內(nèi)打磨至露出金屬光澤，然后用丙酮清洗干凈。試件為水平固定位置，對(duì)口間隙為4mm，采用手工鎢極氬弧焊沿園周均勻點(diǎn)焊六處，每處點(diǎn)固長度應(yīng)不小于20mm。焊條按表2的規(guī)范進(jìn)行烘烤。焊條烘烤規(guī)范焊條型號(hào) 烘烤溫度 保溫時(shí)間E8018-B2 300 ℃ 2hE309Mo-16 150 ℃ 1.5h工藝參數(shù)按方案Ⅰ焊前需進(jìn)行預(yù)熱，根據(jù)Tto-Bessyo等人提出的計(jì)算預(yù)熱溫度公式：To=350√[C]-0.25（℃） 式中，To——預(yù)熱溫度，℃。[C]=[C]x [C]p [C]p=0.005S[C]x[C]x=C （Mn Cr）/9 Ni/18 7Mo/90 式中，[C]x——成分碳當(dāng)量；[C]p——尺寸碳當(dāng)量； S——試件厚度（本文中S=25mm）;[C]x=C （Mn Cr）/9 7/90Mo=0.361[C]p=0.045 則To=138℃因此預(yù)熱溫度選為150℃。采用氧-乙炔焰對(duì)試件進(jìn)行加溫，先用測溫筆粗略判斷試件表面的的溫度（以筆跡顏色變化快慢進(jìn)行估計(jì)），最后用半導(dǎo)體點(diǎn)溫計(jì)測定，測量點(diǎn)至少應(yīng)選擇三點(diǎn)，以保證試件整體均達(dá)到所要求的預(yù)熱溫度。焊接時(shí)，第一層采用手工鎢極氬弧焊打底，為避免仰焊處焊縫背面產(chǎn)生凹陷，送絲時(shí)采用內(nèi)填絲法，即焊絲通過對(duì)口間隙從管內(nèi)送入。其余各層采用焊條電弧焊，共焊6層，每個(gè)焊層一條焊道。方案Ⅰ和方案Ⅱ的焊接工藝參數(shù)見表3、4。按方案Ⅰ焊表3 方案Ⅰ的焊接工藝參數(shù)焊道名稱 焊接方法 焊接材料 焊材規(guī)格/mm 焊接電流/A 電弧電壓/V 預(yù)熱及層間溫度 熱處理規(guī)范打底層鎢板氬弧焊ER80S-B2L φ2.4 110 12填充層焊條電弧焊E8018-B2 φ3.2 5 85～90 23～25150℃ 715。×75min蓋面層 焊條電弧焊 E8018-B2 φ3.2 5 85～90 23～25表4 方案Ⅱ的焊接工藝參數(shù)焊道名稱 焊接方法 焊接材料 焊材規(guī)格/mm 焊接電流/A 電弧電壓/V 預(yù)熱及層間溫度 熱處理規(guī)范打底層 鎢板氬弧焊 ER80S-B2L φ2.4 110 12填充層 焊條電弧焊 E309Mo-16 φ3.2 90～95 22～24 / /蓋面層 焊條電弧焊 E309Mo-16 φ3.2 90～95 22～24接時(shí)，層間溫度應(yīng)不低于150℃，為防止中斷焊接而引起試件的降溫，施焊時(shí)應(yīng)由二名焊工交替操作，焊后應(yīng)立即采取保溫緩冷措施。熱處理采用方案Ⅰ焊接的試件，焊后應(yīng)進(jìn)行局部高溫回火處理。熱處理的工藝為：升溫速度為200℃/h，升到715℃保溫1小時(shí)15分鐘，降溫速度100℃/h，降到300℃后空冷。具體采用JL-4型履帶式電加熱器（1146×310）包繞焊縫，用硅酸鋁棉層保溫，保溫層厚度50mm，溫度控制采用DJK-A型電加熱器自動(dòng)控溫儀。評(píng)定試驗(yàn)播報(bào)編輯試件焊后按JB4730-94《壓力容器無損檢測》標(biāo)準(zhǔn)進(jìn)行100%的超聲波探傷檢驗(yàn)，焊縫Ⅰ級(jí)合格。按JB4708《鋼制壓力容器焊接工藝評(píng)定》標(biāo)準(zhǔn)進(jìn)行焊接工藝評(píng)定試驗(yàn)。評(píng)定結(jié)果見表5。表5 焊接工藝評(píng)定試驗(yàn)結(jié)果試驗(yàn)方案 拉伸試驗(yàn) 彎曲試驗(yàn) 沖擊韌性試驗(yàn)aky（J/cm2）抗拉強(qiáng)度δb/Mpa 斷裂部位 彎曲角度 面彎 背彎 焊縫 熔合線 熱影響區(qū)(HAZ)方案Ⅰ 550/530 母材 50。 合格 合格 84.8 162 135.6方案Ⅱ 525/520 母材 50。 合格 合格 79.4 109.2 96.7從拉伸試驗(yàn)結(jié)果可知，兩種方案的拉伸試樣全部斷在母材，說明焊縫的抗拉強(qiáng)度高于母材；彎曲試驗(yàn)全部合格，說明焊縫的塑性較好。根據(jù)表5中的沖擊韌性試驗(yàn)結(jié)果可知，方案Ⅰ的沖擊韌性明顯高于方案Ⅱ，證明方案Ⅰ的焊后熱處理規(guī)范比較理想，高溫回火不僅達(dá)到了改善接頭組織和性能目的，而且使韌性與強(qiáng)度配合適當(dāng)。從室溫機(jī)械性能結(jié)果可知，所推薦的兩種焊接工藝方案均可用于現(xiàn)場施工。方案Ⅰ采用了與母材成分接近的焊條，焊縫性能同母材匹配，焊縫應(yīng)具有較高的熱強(qiáng)性，焊縫在高溫下長期使用不易破壞。難點(diǎn)是焊后熱處理規(guī)范較為嚴(yán)格，回火溫度和保溫時(shí)間及加熱和冷卻速度控制不當(dāng)反而會(huì)引起焊縫性能下降。方案Ⅱ采用了奧氏體不銹鋼焊條施焊，雖然可以省去焊后熱處理，但由于焊縫與母材膨脹系數(shù)不同，長期高溫工作時(shí)可發(fā)生碳的擴(kuò)散遷移現(xiàn)象，容易導(dǎo)致焊縫在熔合區(qū)發(fā)生破壞。因此，從使用可靠性考慮，現(xiàn)場采用方案Ⅰ施焊更為穩(wěn)妥。4 結(jié)論15CrMo鋼厚壁高壓管的焊接采用兩種焊接方案均為可行。為了保證焊縫性能同母材匹配且具有較高的熱強(qiáng)性，采用方案Ⅰ效果更佳，關(guān)鍵是要嚴(yán)格控制焊后熱處理工藝。方案Ⅱ雖可省去焊后熱處理，但焊縫在高溫下發(fā)生碳的遷移擴(kuò)散而導(dǎo)致焊縫破壞的可能性不容忽視，因此，只有在焊后無法進(jìn)行熱處理時(shí)才慎重采用。表面熱處理播報(bào)編輯熱處理是提高與改良15CrMo合金圓鋼性能的極為有效措施，它對(duì)于產(chǎn)品的可靠性與經(jīng)濟(jì)性均起到十分重要的作用。15CrMo合金圓鋼的熱處理通常包括普通熱處理（退火、正火、淬火、回火）和表面熱處理（表面淬火及化學(xué)熱處理一滲碳、氮化、滲金屬等）兩大類。在機(jī)械工程中，許多機(jī)器零件，例如內(nèi)燃機(jī)的曲軸、齒輪、凸輪軸以及重要減速器中的齒輪等，不僅要求心部有足夠的韌性、塑性和抗彎強(qiáng)度，且要求表面一定厚度內(nèi)有高硬度、高耐磨性和高的疲勞強(qiáng)度。前述的各種整體熱處理方式難以同時(shí)滿足上述各項(xiàng)性能要求，采用表面熱處理則是同時(shí)達(dá)到這些性能要求的最有效方法。表面熱處理就是通過改變15CrMo合金圓鋼表層的組織以改變表面性能的一種熱處理方式。表面淬火一一只改變表層組織，而不改變表層化學(xué)成分的熱處理。它可以用高頻、中頻或工頻電流感應(yīng)加熱方式或用火焰加熱方式實(shí)現(xiàn)。其共同特點(diǎn)是設(shè)法使15CrMo合金圓鋼表面迅速加熱到淬火溫度，而在熱量尚未傳至零件心部時(shí)，隨即迅速冷卻，使表面硬度高，而心部仍有較高韌性?；瘜W(xué)處理一一使15CrMo合金圓鋼的表層化學(xué)成分與組織均發(fā)生改變的熱處理方式?；瘜W(xué)熱處理按照15CrMo合金圓鋼表面滲入元素的不同，可分為滲碳、氮化、碳氮共滲、滲金屬等方法。它對(duì)提高和改善15CrMo合金圓鋼的耐磨性、抗腐蝕性、抗疲勞性等是十分有效的。當(dāng)前來化學(xué)熱處理發(fā)展迅速，新技術(shù)的應(yīng)用甚多。-材質(zhì)執(zhí)行標(biāo)準(zhǔn)規(guī)格合金板15CrMoGB5310-2008840×120合金板15CrMoGB5310-2008426×20-22-30合金板15CrMoGB5310-2008426×12-14-16合金板15CrMoGB5310-2008377×24-45合金板15CrMoGB5310-2008377×10-12-16合金板15CrMoGB5310-2008325×25-32合金板15CrMoGB5310-2008325×16-20合金板15CrMoGB5310-2008325×10-12-14合金板15CrMoGB5310-2008273×16-20合金板15CrMoGB5310-2008273×10-12-14合金板15CrMoGB5310-2008219×14-16-20合金管15CrMoGB5310-2008219×8-9-10-12合金管15CrMoGB5310-2008168×8-12-16-20合金管15CrMoGB5310-2008159×8-10-12-16合金管15CrMoGB5310-2008133×6-8-10-14合金管15CrMoGB5310-2008114×6-8-10合金管15CrMoGB5310-200889×6-8-10合金管15CrMoGB5310-200876×6-8-10-12合金管15CrMoGB5310-200863.5×4-6合金管15CrMoGB5310-200860×4-5-9合金管15CrMoGB5310-200857×4-6-8合金管15CrMoGB5310-200851×3.5-4-5-6金管管15CrMoGB5310-200848×3.5-5-6-8合金管15CrMoGB5310-200845×3.5-6-7合金管15CrMoGB5310-200842×3.5-5-6合金管15CrMoGB5310-200838×3.5-4-5合金管15CrMoGB5310-200832×4-5-6合金管15CrMoGB5310-200828×4-6合金管15CrMoGB5310-200825×3.5化學(xué)成分播報(bào)編輯牌號(hào)化學(xué)成分（質(zhì)量分?jǐn)?shù)）（%）-CMnSiCrMoNiNb+TaSP15CrMo0.12~0.180.40~0.700.17~0.370.80~1.100.40~0.55≤0.30_≤0.035≤0.035力學(xué)性能播報(bào)編輯牌號(hào)拉力強(qiáng)度MPa屈服點(diǎn)MPa伸長率（%）15CrMo440~64029522應(yīng)用舉例播報(bào)編輯石油、石化、高壓鍋爐等，專門用途的無縫管有鍋爐用無縫管、地質(zhì)用無縫鋼管及石油用無縫管等多種。現(xiàn)貨規(guī)格播報(bào)編輯品名規(guī)格/mm材質(zhì)品名規(guī)格/mm材質(zhì)光亮圓棒3.0-2515CrMo熱軋鋼板4-1015CrMo熱軋圓鋼12-5015CrMo鍛打鋼板8-1015CrMo熱軋圓鋼Ф100-13015CrMo鍛打鋼板12-1615CrMo熱軋圓鋼Ф140-15015CrMo熱軋鋼板18-2015CrMo熱軋圓鋼Ф160-17015CrMo鍛打鋼板22-2815CrMo熱軋圓鋼Ф16-4015CrMo熱軋鋼板30-3415CrMo熱軋圓鋼Ф16-4515CrMo鍛打鋼板35-7515CrMo熱軋圓鋼Ф180-20015CrMo鍛打鋼板75-8015CrMo熱軋圓鋼Ф200-28015CrMo鍛打鋼板80-10015CrMo熱軋圓鋼290-50015CrMo鍛打鋼板100-15015CrMo熱軋圓鋼500-150015CrMo鍛打鋼板15015CrMo熱軋圓鋼Ф50-7015CrMo鍛打鋼板16015CrMo熱軋圓鋼Ф50-30015CrMo鍛打鋼板17015CrMo熱軋圓鋼Ф50-9515CrMo鍛打鋼板18015CrMo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(bào)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?2025?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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