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精密無縫鋼管合金圓鋼-5系列鋁板/卷/棒
專業(yè)為您提供5系列鋁板/卷/棒牌號，材質(zhì)單，在線報價單 歡迎選購
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[1]。其執(zhí)行DIN2391、DIN2445、EN10305等標準，常用材質(zhì)為ST35（E235）、ST45（E255）、ST52（E355）系列碳素結(jié)構(gòu)鋼，廣泛應(yīng)用于液壓系統(tǒng)、汽車制造、軍工及航空航天等領(lǐng)域。該鋼管采用冷拔、熱軋、冷軋工藝生產(chǎn)，其中冷拔工藝可制造直徑5-200mm、壁厚2.5-12mm的管材，需經(jīng)化學(xué)成分檢驗（碳、硅、錳等）和物理性能測試，符合GB/T8162-87規(guī)范 [2]。熱處理工藝涵蓋退火、正火、淬火等，通過調(diào)節(jié)溫度與冷卻方式優(yōu)化材料性能，滿足高強度、耐腐蝕等需求。中文名冷拔精密無縫鋼管外文名Cold drawn precision seamless steel pipe別 名精密無縫鋼管鋼管主要品種液壓系統(tǒng)專用鋼管主要標準DIN2391， DIN2445主要材質(zhì)ST35（E235）特 點冷拔成品精度高，表面質(zhì)量好目錄1分類2自定義3化學(xué)成分4產(chǎn)品特點5熱處理工藝分類播報編輯精密無縫鋼管，精密液壓無縫鋼管，冷拔精密無縫鋼管，冷軋精密無縫鋼管，高精密無縫鋼管，精密光亮無縫鋼管。(1)鋼管主要品種：DIN系列高精度精密光亮無縫鋼管、液壓系統(tǒng)專用鋼管、汽車制造專用鋼管(2)主要標準：DIN2391， DIN2445， EN10305， DIN1629， DIN1630， ASTM A179(3)主要材質(zhì)：ST35（E235） ST37.4 ST45（E255） ST52（E355）冷拔精密無縫鋼管(4)主要交貨狀態(tài)：NBK（+N） GBK（+A） BK（+C） BKW（+LC） BKS（+SR）(5)主要特點：鋼管內(nèi)外壁無氧化層，承受高壓無泄漏，高精度，高光潔度，冷彎不變形，擴口、壓扁無裂縫。（6）主要用途：應(yīng)用于液壓系統(tǒng)配管、汽車制造配管、軍工、工程機械、鐵路機車、航空航天、船舶、注塑機、壓鑄機、機床、柴油機、石油化工、電站、鍋爐設(shè)備等各行各業(yè)。自定義播報編輯冷拔精密鋼管是一種通過冷拔或熱軋?zhí)幚砗蟮囊环N高精密的鋼管材料。由于精密鋼管內(nèi)外壁無氧化層、承受高壓無泄漏、高精度、高光潔度、冷彎不變形、擴口、壓扁無裂縫等優(yōu)點，所以主要用來生產(chǎn)氣動或液壓 元件的產(chǎn)品，如汽缸或油缸，可以是無縫管。化學(xué)成分播報編輯冷拔精密鋼管的化學(xué)成分有碳C、硅Si、錳Mn、硫S、磷P、Cr。產(chǎn)品特點播報編輯1.外徑更小。2.精度高可做小批量生3.冷拔成品精度高，表面質(zhì)量好。4.鋼管橫面積更復(fù)雜。5.鋼管性能更優(yōu)越，金屬比較密。 1、生產(chǎn)制造方法按生產(chǎn)方法不同可分為熱軋管、冷軋管、冷拔管、擠壓管等。1.1、熱軋無縫管一般在自動軋管機組上生產(chǎn)。實心管坯經(jīng)檢查并清除表面缺陷，截成所需長度，在管坯穿孔端端面上定心，然后送往加熱爐加熱，在穿孔機上穿孔。在穿孔同時不斷旋轉(zhuǎn)和前進，在軋輥和頂頭的作用下，管坯內(nèi)部逐漸形成空腔，稱毛管。再送至自動軋管機上繼續(xù)軋制。最后經(jīng)均整機均整壁厚，經(jīng)定徑機定徑，達到規(guī)格要求。利用連續(xù)式軋管機組生產(chǎn)熱軋無縫鋼管是較先進的方法。1.2、若欲獲得尺寸更小和質(zhì)量更好的無縫管，必須采用冷軋、冷拔或者兩者聯(lián)合的方法。冷軋通常在二輥式軋機上進行，鋼管在變斷面圓孔槽和不動的錐形頂頭所組成的環(huán)形孔型中軋制。冷拔通常在0.5～100T的單鏈式或雙鏈式冷拔機上進行。1.3、擠壓法即將加熱好的管坯放在密閉的擠壓圓筒內(nèi)，穿孔棒與擠壓桿一起運動，使擠壓件從較小的?？字袛D出。此法可生產(chǎn)直徑較小的鋼管。2、用途2.1、無縫管用途很廣泛。一般用途的無縫管由普通碳素結(jié)構(gòu)鋼、低合金結(jié)構(gòu)鋼或合金結(jié)構(gòu)鋼軋制，產(chǎn)量最多，主要用作輸送流體的管道或結(jié)構(gòu)零件。2.2、根據(jù)用途不同分三類供應(yīng)：a、按化學(xué)成分和機械性能供應(yīng)；b、按機械性能供應(yīng)；c、按水壓試驗供應(yīng)。按a、b類供應(yīng)的鋼管，如用于承受液體壓力，也要進行水壓試驗。2.3、專門用途的無縫管有鍋爐用無縫管、地質(zhì)用無縫管及石油用無縫管等多種。3、種類3.1、無縫鋼管按生產(chǎn)方法不同可分為熱軋管、冷軋管、冷拔管、擠壓管等。3.2、按外形分類有圓形管、異形管之分。異形管除方形管和矩形管外，還有橢圓管、半圓管、三角形管、六角形管、凸字形管、梅花形管等。3.3、按材質(zhì)的不同，分為普通碳素結(jié)構(gòu)管、低合金結(jié)構(gòu)管、優(yōu)質(zhì)碳素結(jié)構(gòu)管、合金結(jié)構(gòu)管、不銹管等。3.4、按專門用途分，有鍋爐管、地質(zhì)管、石油管等。4、規(guī)格及外觀質(zhì)量無縫管按GB/T8162-87規(guī)定4.1、規(guī)格：熱軋管外徑32～630mm。壁厚2.5～75mm。冷軋(冷拔)管外徑5～200mm。壁厚2.5～12mm。4.2、外觀質(zhì)量：鋼管的內(nèi)外表面不得有裂縫、折疊、軋折、離層、發(fā)紋和結(jié)疤缺陷存在。這些缺陷應(yīng)完全清除掉，清除后不得使壁厚和外徑超過負偏差。4.3、鋼管的兩端應(yīng)切成直角，并清除毛刺。壁厚大于20mm的鋼管允許氣割和熱鋸切割。經(jīng)供需雙方協(xié)議也可不切頭。4.4、冷拔或冷軋精密無縫鋼管《表面質(zhì)量》參照GB3639-83。5、化學(xué)成分檢驗5.1、按化學(xué)成分和機械性能供應(yīng)的國產(chǎn)無縫管，如10、15、20、25、30、35、40、45和50號鋼的化學(xué)成分應(yīng)符合GB/T699-88的規(guī)定。進口無縫管按合同規(guī)定的有關(guān)標準檢驗。09MnV、16Mn、15MnV鋼的化學(xué)成分應(yīng)符合GB1591-79的規(guī)定。5.2、具體分析方法參照GB223-84《鋼鐵及合金化學(xué)分析方法》的有關(guān)部分。5.3、分析偏差參照GB222-84《鋼的化學(xué)分析用試樣及成品化學(xué)成分允許偏差》。6、物理性能檢驗6.1、按機構(gòu)性能供應(yīng)的國產(chǎn)無縫管，普通碳素鋼按GB/T700-88的甲類鋼制造(但必須保證含硫量不超過0.050%和含磷量不超過0.045%)，其機械性能應(yīng)符合GB8162-87表內(nèi)所規(guī)定的數(shù)值。6.2、按水壓試驗供應(yīng)的國產(chǎn)無縫管必須保證標準所規(guī)定的水壓試驗。6.3、進口無縫管的物理性能檢驗按合同規(guī)定的有關(guān)標準進行。7、主要進出口情況7.1、一般無縫管進口量很大。主要進口國家是德國和日本。歐洲國家如羅馬尼亞、俄羅斯、瑞士、法國、西班牙、捷克、南斯拉夫、匈牙利等國都有進口。還有少量從南美的阿根廷、墨西哥等國進口。7.2、根據(jù)用貨單位的不同要求，進口無縫管規(guī)格多達100多種，常見的規(guī)格有15922mm、1595mm、15918mm。114.38mm、114.310mm、114.313mm。長度一般為5～8m或4～7m不等。主要是熱軋?zhí)冀Y(jié)構(gòu)，ST65。進口規(guī)格直徑最小的為305mm，最大的47813mm。7.3、從法國和西班牙曾進口少量直徑較小而壁薄的無縫管，如183mm，223mm、26.93mm等。執(zhí)行德國曼內(nèi)斯曼鋼管廠的一般規(guī)則。7.4、從匈牙利和日本進口的無縫管，常參照DIN2448、DIN1629。7.5、在進口索賠案例中，進口無縫管存在的質(zhì)量問題主要有：化學(xué)成分不合格、壓扁試驗發(fā)生劈裂、抗拉強度低、出現(xiàn)嚴重銹蝕及凹坑等。熱處理工藝播報編輯退火是將冷軋精密光亮鋼管加熱到適當(dāng)溫度，根據(jù)材料和工件尺寸采用不同的保溫時間，然后進行緩慢冷卻，目的是使金屬內(nèi)部組織達到或接近平衡狀態(tài)，獲得良好的工藝性能和使用性能，或 者為進一步淬火作組織準備。正火是將冷軋精密光亮鋼管加熱到適宜的溫度后在空氣中冷卻，正火的效果同退火相似，只是得到的組織更細，常用于改善材料的切削性能，也有時用于對一些要求不高的零件作為最終熱處理。淬火是將冷軋精密光亮鋼管加熱保溫后，在水、油或其它無機鹽、有機水溶液等淬冷介質(zhì)中快速冷卻。淬火后冷軋精密光亮鋼管變硬，但同時變脆。為了降低冷軋精密光亮鋼管的脆性，將淬火后的冷軋精密光亮鋼管在高于室溫而低于650℃的某一適當(dāng)溫度進行長時間的保溫，再進行冷卻，這種工藝稱為回火。退火、正火、淬火、回火是整體熱處理中的“四把火”，其中的淬火與回火關(guān)系密切，常常配合使用，缺一不可?！八陌鸦稹彪S著加熱溫度和冷卻方式的不同，又演變出不同的熱處理工藝。為了獲得一定的強度和韌性，把淬火和高溫回火結(jié)合起來的工藝，稱為調(diào)質(zhì)。某些合金淬火形成過飽和固溶體后，將其置于室溫或稍高的適當(dāng)溫度下保持較長時間，以提高合金的硬度、強度或電性磁性等。這樣的熱處理工藝稱為時效處理。把壓力加工形變與熱處理有效而緊密地結(jié)合起來進行，使冷軋精密光亮鋼管獲得很好的強度、韌性配合的方法稱為形變熱處理；在負壓氣氛或真空中進行的熱處理稱為真空熱處理，它不僅能使冷軋精密光亮鋼管不氧化，不脫碳，保持處理后冷軋精密光亮鋼管表面光潔，提高工件的性能，還可以通入滲劑進行化學(xué)熱處理。表面熱處理是只加熱冷軋精密光亮鋼管表層，以改變其表層力學(xué)性能的金屬熱處理工藝。為了只加熱冷軋精密光亮鋼管表層而不使過多的熱量傳入工件內(nèi)部，使用的熱源須具有高的能量密度，即在單位面積的冷軋精密光亮鋼管上給予較大的熱能，使冷軋精密光亮鋼管表層或局部能短時或瞬時達到高溫。表面熱處理的主要方法有火焰淬火和感應(yīng)加熱熱處理，常用的熱源有氧乙炔或氧丙烷等火焰、感應(yīng)電流、激光和電子束等?；瘜W(xué)熱處理是通過改變冷軋精密光亮鋼管表層化學(xué)成分、組織和性能的金屬熱處理工藝?；瘜W(xué)熱處理與表面熱處理不同之處是后者改變了工件表層的化學(xué)成分?；瘜W(xué)熱處理是將工件放在含碳、氮或其它合金元素的介質(zhì)(氣體、液體、固體)中加熱，保溫較長時間，從而使工件表層滲入碳、氮、硼和鉻等元素。滲入元素后，有時還要進行其它熱處理工藝如淬火及回火。化學(xué)熱處理的主要方法有滲碳、滲氮、滲金屬。熱處理是機械零件和工模具制造過程中的重要工序之一。大體來說，它可以保證和提高冷軋精密光亮鋼管的各種性能 ，如耐磨、耐腐蝕等。還可以改善毛坯的組織和應(yīng)力狀態(tài)，以利于進行各種冷、熱加工。例如白口鑄鐵經(jīng)過長時間退火處理可以獲得可鍛鑄鐵，提高塑性 ；齒輪采用正確的熱處理工藝，使用壽命可以比不經(jīng)熱處理的齒輪成倍或幾十倍地提高；另外，價廉的碳鋼通過滲入某些合金元素就具有某些價昂的合金鋼性能，可以代替某些耐熱鋼、不銹鋼；工模具則幾乎全部需要經(jīng)過熱處理方可使用。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?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?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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