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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(tuán)隊權(quán)威合作個人中心收藏查看我的收藏0有用+1065Mn彈簧鋼播報討論上傳視頻彈簧鋼同義詞65Mn彈簧鋼板（彈簧鋼）一般指65Mn彈簧鋼65Mn彈簧鋼，錳提高淬透性，φ12mm的鋼材油中可以淬透，表面脫碳傾向比硅鋼小，經(jīng)熱處理后的綜合力學(xué)性能優(yōu)于碳鋼，但有過熱敏感性和回火脆性。用作小尺寸各種扁、圓彈簧、座墊彈簧、彈簧發(fā)條，也可制作彈簧環(huán)、氣門簧、離合器簧片、剎車彈簧及冷拔鋼絲冷卷螺旋彈簧等。中文名65Mn彈簧鋼外文名65Mn別 名65錳執(zhí)行標(biāo)準(zhǔn)GB/T 1222-2007屈服強(qiáng)度520~690(MPa)軋 材Φ16～160mm目錄1產(chǎn)品介紹2化學(xué)成分3力學(xué)性能4熱處理5焊接性能6型號7冷拔退火8典型實例9酸洗工藝產(chǎn)品介紹播報編輯執(zhí)行標(biāo)準(zhǔn)：GB/T 1222-2007●特性及適用范圍：圖片(6張)65mn 強(qiáng)度.硬度.彈性和淬透性均比65號鋼高，具有過熱敏感性和回火脆性傾向，水淬有形成裂紋傾向。退火態(tài)可切削性尚可，冷變形塑性低，焊接性差。 受中等載荷的板彈簧，直徑達(dá)7-20mm的螺旋彈簧及彈簧墊圈.彈簧環(huán)。高耐磨性零件，如磨床主軸.彈簧卡頭.精密機(jī)床絲桿.切刀.螺旋輥子軸承上的套環(huán).鐵道鋼軌等化學(xué)成分播報編輯●化學(xué)成份：鋼帶碳 C ：0.62～0.70硅 Si：0.17～0.37錳 Mn：0.90～1.20硫 S ：≤0.035磷 P ：≤0.035鉻 Cr：≤0.25鎳 Ni：≤0.30銅 Cu：≤0.25力學(xué)性能播報編輯●力學(xué)性能：抗拉強(qiáng)度σb (MPa)：825~925伸長率 δ10 (%)：14~22.5斷面收縮率 ψ (%)：不大于10硬度：熱軋,≤302HB;熱軋+熱處理,≤321HB熱處理播報編輯●熱處理規(guī)范及金相組織：熱處理規(guī)范：淬火830℃±20℃,油冷; 回火540℃±50℃(特殊需要時,±30℃)。金相組織：屈氏體?！衽R界點溫度（近似值）Ac1=726℃，Ac3=765℃，Ar3=741℃，Ar1=689℃，Ms=270℃?！裾鹨?guī)范:溫度810±10℃，空氣冷卻。 [1]●交貨狀態(tài)：熱軋鋼材以熱處理或不熱處理狀態(tài)交貨，冷拉鋼材以熱處理狀態(tài)交貨?！窆┴浺?guī)格：盤圓：Φ5.5～16mm鍛材：Φ160～450mm65Mn密度65Mn密度 ρ=7.85克/立方厘米，該鋼可以冷軋成鋼板、鋼帶和鋼絲，制作彈簧。65Mn也可以制作成如鉗工的鑿子、劃針等工具。65Mn鋼可制作一般截面尺寸為8～15mm左右的小型彈簧如各種小尺寸扁、圓彈簧，底墊彈簧、彈簧發(fā)條。760℃×30min保溫，再以20℃/h的冷速冷至700℃×6h再爐冷，得到完全的球化組織，尺寸均勻。焊接性能播報編輯氬弧焊對焊工藝為了減小電極的消耗，選擇直流正接進(jìn)行線材的對焊試驗，即選用直流電源，線材接電源的正極，鎢極接電源的負(fù)極。含1%或2%氧化釷的鎢極發(fā)射電子效率高，電流承載能力好，且抗污染性能好，引弧容易并且電弧比較穩(wěn)定。為了便于操作，選擇直徑為2 mm的較細(xì)的釷鎢極，并且電極前端磨尖。由于氬氣較低的電弧電壓特性對于薄板和線材的手弧焊特別有益，因此選擇氬氣做保護(hù)氣體。試驗選用直流手工氬弧焊機(jī)，焊接前，將鋼絲兩端頭仔細(xì)磨平，為防止焊點產(chǎn)生氣孔，用丙酮將端頭油污清洗干凈。將兩端磨平的線材放在平整潔凈的對正板上（圖1），使兩端頭對正，接頭處不留間隙，用壓鐵壓住接頭兩側(cè)。將線材接焊機(jī)正極，鎢極接負(fù)極，分別將電流調(diào)至20 A，15 A，10 A，8 A進(jìn)行焊接。焊接時，在接頭旁邊引燃點弧并使之燃燒穩(wěn)定，將電弧移至接頭處使接頭金屬熔化后迅速將電弧熄滅，同時輕微施加頂鍛力，冷卻后即完成焊接過程，焊接過程中不使用填充焊絲。試驗發(fā)現(xiàn)，當(dāng)焊接電流為20 A時，電弧燃燒劇烈，接頭處金屬飛濺嚴(yán)重，焊點塌陷嚴(yán)重。當(dāng)電流調(diào)至15 A時，電弧燃燒較平穩(wěn)，熔池飛濺少，但焊縫仍有塌陷。但電流降至10 A時，引弧容易，電弧燃燒穩(wěn)定，焊縫處沒有塌陷現(xiàn)象。圖2為焊接電流10 A時，用數(shù)碼相機(jī)在Leica MZ6型體視顯微鏡下拍下的焊接接頭形狀?？梢钥闯?，接頭的圓柱度較好，將其打磨后能滿足線鋸的要求。當(dāng)電流調(diào)至8 A以下時，引弧困難且電弧不穩(wěn)定，難以完成焊接過程。焊接接頭試驗由于65Mn鋼具有過熱傾向，因此焊接熱影響區(qū)對接頭的力學(xué)性能影響很大。直徑0.7 mm的65Mn鋼絲經(jīng)氬弧焊對焊后接頭處非常硬脆，輕輕折彎焊點處，就會在熔合線或焊縫處脆斷，斷口呈明顯的脆性斷裂形貌。所得接頭由焊縫和熱影響區(qū)組成，沿接頭軸線測試從焊縫中心至母材各個區(qū)域的顯微硬度。測量結(jié)果表明，從母材到熱影響區(qū)及焊縫中部，顯微硬度急劇增加，焊縫中部硬度達(dá)HV 1 060，這說明熱影響區(qū)及焊縫中部生成了硬脆組織。對于這種具有硬脆組織的接頭，為了提高其韌性和塑性，降低其硬度，獲得硬度、強(qiáng)度、塑性和韌性的適當(dāng)配合，必須對焊接接頭進(jìn)行適當(dāng)?shù)幕鼗鹛幚?。熱處理后，?yīng)將熱影響區(qū)的脆性消除，同時應(yīng)能使母材保持一定的強(qiáng)度和彈性?；鼗鹪谙涫诫娮锠t內(nèi)進(jìn)行，回火工藝見表1。將回火后的鋼絲焊接接頭處仔細(xì)打磨，使其直徑與母材直徑大致相等，再在WE-50拉伸試驗機(jī)上進(jìn)行拉伸試驗。每種回火處理的試樣取三根，取其拉力的平均值。由試驗可以看出，330℃以上熱處理后，母材彈性基本消失，且斷裂均發(fā)生在母材處，而不發(fā)生在焊點及其熱影響區(qū)，這說明熱處理后雖然熱影響區(qū)的脆性完全消失，但母材的強(qiáng)度被大大削落（經(jīng)試驗，所用母材的抗拉強(qiáng)度為1 663 MPa）。260℃保溫10 min時，雖然材料彈性基本不變，但熱影響區(qū)的脆性不能消除。當(dāng)加熱溫度為280℃，保溫10 min時效果最好，熱影響區(qū)的抗拉強(qiáng)度只比母材降低20%左右，而母材的彈性消失較小。將280℃回火處理的焊頭沿軸線方向測試縱剖面上各個區(qū)的顯微硬度，發(fā)現(xiàn)焊縫處的最高硬度值降低到HV 500左右，比未處理時的硬度降低大約1倍。 焊好的環(huán)形鋼絲不但應(yīng)能滿足一定的強(qiáng)度和彈性要求，而且具有一定的疲勞強(qiáng)度.型號播報編輯材質(zhì) 規(guī)格（厚*寬*長） 產(chǎn)地 單件重量（噸） 備注65MN 2.75*1010/1250*C 萊鋼 16/2065MN 2.80*1010/1250*C 萊鋼 16/2065MN 3.00*1010/1250*C 萊鋼 16/2065MN 3.25*1010/1250*C 萊鋼 16/2065MN 3.50*1010/1250*C 萊鋼 16/2065MN 3.75*1010/1250*C 萊鋼 16/20.......65MN 14.00*1010/1250*C 萊鋼 16/20冷拔退火播報編輯傳統(tǒng)周期性球化退火工藝，退火溫度750℃，保溫2h，爐冷到溫度（680±10）℃，保溫3h,再爐冷到550℃以后，出爐空冷。生產(chǎn)效率低，氧化脫碳率達(dá)22%-40%，表面硬度及彈性達(dá)不到要求。不完全退火新工藝，退火溫度（740±10）℃，保溫4h,爐冷到550℃以后，出爐空冷。抗拉強(qiáng)度600-620Mpa、伸長率53.5%-40%，硬度209-214HBW金相組織為球化珠光體+少量點狀珠光體，縮短了生產(chǎn)周期，節(jié)省能源。傳統(tǒng)退火工藝，退火溫度730℃，保溫13h,再爐冷到650℃以后，出爐空冷。退火新工藝：退火溫度（860±10）℃，保溫45-60min，爐冷到（750±10）℃，保溫3-3.5h,在爐冷至650-660℃以后，出爐堆冷或入保溫坑緩冷。金相組織符合要求：珠光體組織2.5-6級，以4級左右為佳，該工藝提高效率80%-100%。典型實例播報編輯1、可用于普通磨具彈簧鋼2、冷沖模具凸模3、可用于塑膠模、壓鑄模的整體淬火頂桿用鋼。酸洗工藝播報編輯65Mn低合金圓鋼的酸洗處理廣泛地應(yīng)用于冷軋板材坯料即熱軋板材的表面氧化鐵皮的去除，如熱軋65Mn低合金圓鋼需進(jìn)行磷化或鍍層等表面處理加工前去除氧化鐵皮；焊接管材在鍍鋅或進(jìn)行其它熱浸鍍、電鍍加工前的表面預(yù)處理；退火處理后的鋼材如管材、65Mn低合金圓鋼、線材等冷拔加工前的表面處理；鋼鐵加工件進(jìn)行電鍍、電刷鍍前的除銹處理以及不銹鋼和特殊鋼生產(chǎn)過程中的類似處理。當(dāng)前酸洗仍是65Mn低合金圓鋼生產(chǎn)和鋼鐵表面處理時不可或缺的工藝過程。但是，65Mn低合金圓鋼酸洗處理工藝的采用也帶來如下的一些問題：【1】大量消耗65Mn低合金圓鋼材料和酸 在酸洗的過程中，有的主要通過酸與鐵皮的化學(xué)反應(yīng)，溶解相應(yīng)的65Mn低合金圓鋼氧化物的溶解作用來除去鐵皮。有的，如使用硫酸進(jìn)行65Mn低合金圓鋼酸洗時，還要借助于酸與65Mn低合金圓鋼發(fā)生化學(xué)反應(yīng)產(chǎn)生的氫氣泡的剝離作用來除去氧化鐵皮。因此在酸洗過程中，大量消耗酸是必然的。雖然在酸洗中使用酸洗緩蝕劑可以降低65Mn低合金圓鋼的金屬消耗，但是仍有相當(dāng)量的金屬鐵損失掉?！?】可能降低65Mn低合金圓鋼的物理性能 在酸洗過程中，65Mn低合金圓鋼和酸之間發(fā)生化學(xué)反應(yīng)并產(chǎn)生氫氣。由于酸洗液中的氫的化學(xué)位高于被酸洗的65Mn低合金圓鋼中氫的化學(xué)位，生成的氫會滲入鋼中并積存起來造成 氫脆，從而影響65Mn低合金圓鋼的機(jī)械性能或以后的加工處理?！?】會帶來一系列的環(huán)境污染問題 采用酸洗工藝對65Mn低合金圓鋼或零件進(jìn)行表面處理，由于65Mn低合金圓鋼的品種、產(chǎn)品的規(guī)格和生產(chǎn)的規(guī)模各不相同，從而造成了在生產(chǎn)裝備和生產(chǎn)環(huán)境方面有著很大差別。如酸洗槽體的密封、對生產(chǎn)設(shè)備的腐蝕、酸洗車間的通風(fēng)排風(fēng)、酸霧的排出和處理以及污水的處理和排放等方面，處理方法和處理水平相差懸殊。從而會帶來許多環(huán)境保護(hù)方面的問題，而需要一一加以處理和解決?！?】廢酸和鐵鹽的處理問題 65Mn低合金圓鋼的酸洗在消耗大量金屬鐵的同時還產(chǎn)生大量的廢酸液與相應(yīng)的酸和氧化鐵或生成的鐵鹽溶液。為了回收和利用這些廢酸液和鐵鹽，需要較大的投資來建設(shè)相應(yīng)的回收和處理設(shè)備。特別是對于一些小型的、小批量的65Mn低合金圓鋼進(jìn)行酸洗處理時，往往會出現(xiàn)酸洗廢液難以集中進(jìn)行處理的情況，一旦發(fā)生直接排放的情況，就會對對環(huán)境造成嚴(yán)重污染。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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