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.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隊權(quán)威合作個人中心收藏查看我的收藏0有用+1020CrMnMo播報討論上傳視頻一種合金結(jié)構(gòu)鋼的牌號20CrMnMo是GB/T3077-2015國家標(biāo)準(zhǔn)規(guī)定的合金結(jié)構(gòu)鋼牌號（統(tǒng)一數(shù)字代號A34202），屬高強度滲碳鋼。其化學(xué)成分主要包括碳（0.17%～0.23%）、鉻（1.10%～1.40%）、鉬（0.20%～0.30%）等元素，經(jīng)850℃油淬與200℃回火后，抗拉強度≥1180MPa，屈服強度≥885MPa，兼具良好的低溫沖擊韌性 [1]。該材料淬透性及力學(xué)性能優(yōu)于20CrMnTi，適用于滲碳淬火工藝，能夠提升抗彎強度與耐磨性，主要用于制造曲軸、齒輪軸、凸輪軸等大型高負荷零件，可替代12Cr2Ni4鋼。其切削加工性良好，但焊接需預(yù)熱及回火處理，且滲碳后磨削易引發(fā)裂紋。交貨狀態(tài)包含正火、退火等熱處理形式或非熱處理狀態(tài)，需在合同中明確標(biāo)注 [1]。中文名20CrMnMo執(zhí)行標(biāo)準(zhǔn)GB/T3077-2015 [1]實 質(zhì)一種合金結(jié)構(gòu)鋼的牌號統(tǒng)一數(shù)字代號A34202抗拉強度（σb/MPa）≥1180屈服點（σs/MPa）：≥885目錄1化學(xué)成分2鋼廠現(xiàn)貨規(guī)格?力學(xué)性能?主要特性3應(yīng)用舉例4表示方法化學(xué)成分播報編輯質(zhì)量分?jǐn)?shù)（%）：鋼板圖片碳 C ：0.17～0.23硅 Si：0.17～0.37錳 Mn：0.90～1.20硫 S ：允許殘余含量≤0.035磷 P ：允許殘余含量≤0.035鉻 Cr：1.10～1.40鎳 Ni：允許殘余含量≤0.030銅 Cu：允許殘余含量≤0.030鉬 Mo：0.20～0.30鋼廠現(xiàn)貨規(guī)格播報編輯產(chǎn)品名稱規(guī)格/mm材質(zhì)冷拉光圓Ф3.0-10020CrMnMo熱軋圓鋼Ф100-20020CrMnMo熱軋圓鋼Ф20-10020CrMnMo熱軋圓鋼Ф200-40020CrMnMo力學(xué)性能【試樣毛坯尺寸】15mm【熱處理】淬火加熱溫度（℃）：850；冷卻劑：油鋼管圖片回火加熱溫度（℃）：200；冷卻劑：水、空【力學(xué)性能】 [1]抗拉強度（σb/MPa）：≥1180屈服點（σs/MPa）：≥885斷后伸長率（δ5/%）：≥10斷面收縮率（ψ/%）：≥45沖擊吸收功（KU2/J）：≥55布氏硬度（HBS100/3000）（退火或高溫回火狀態(tài)）：≤217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。主要特性高強度的高級滲碳鋼。強度高于15CrMnMo，塑性及韌性稍低，淬透性及力學(xué)性能比20CrMnTi高，淬火低溫回火后具有良好的綜合力學(xué)性能和低溫沖擊韌度。滲碳淬火后具有較高的抗彎強度和耐磨性能，但磨削時易產(chǎn)生裂紋。焊接性不好，適于電阻焊接，焊前需預(yù)熱，焊后需回火處理。切削加工性和熱加工性良好。20CrMnMo是國家標(biāo)準(zhǔn)規(guī)定的一種合金結(jié)構(gòu)鋼的牌號，是一種高強度的滲碳鋼。先進行滲碳熱處理，再淬火加熱溫度850℃、油冷；200℃回火、空冷。淬火低溫回火后具有良好的綜合力學(xué)性能和低溫沖擊韌度；滲碳淬火后具有較高的抗彎強度和耐磨性能。常用于制造高硬度、高強度、高韌性的較大重要滲碳件，如曲軸、凸輪軸、連桿、齒輪軸、齒輪、銷軸等。滲碳淬火后硬度高時磨削時易產(chǎn)生裂紋。應(yīng)用舉例播報編輯常用于制造高硬度、高強度、高韌性的較大重要滲碳件（其要求均高于15CrMnMo），如曲軸、凸輪軸、連桿、齒輪軸、齒輪、銷軸，還可代替12Cr2Ni4使用。表示方法播報編輯① 鋼號開頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬分之幾表示，如40Cr、25Cr2MoVA合金管 ②鋼中主要合金元素，除個別微合金元素外，一般以百分之幾表示。當(dāng)平均合金含量小于1.5%時，鋼號中一般只標(biāo)出元素符號，而不標(biāo)明含量，但在特殊情況下易致混淆者，在元素符號后亦可標(biāo)以數(shù)字"1"，例如鋼號"12CrMoV"和"12Cr1MoV"，前者鉻含量為0.4-0.6%，后者為0.9-1.2%，其余成分全部相同。當(dāng)合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時，在元素符號后面應(yīng)標(biāo)明含量，可相應(yīng)表示為2、3、4……等。例如18Cr2Ni4WA。③鋼中的釩V、鈦Ti、鋁AL、硼B(yǎng)、稀土RE等合金元素，均屬微合金元素，雖然含量很低，仍應(yīng)在鋼號中標(biāo)出。例如20MnVB鋼中。釩為0.07-0.12%，硼為0.001-0.005%。④高級優(yōu)質(zhì)鋼應(yīng)在鋼號最后加"A"，以區(qū)別于一般優(yōu)質(zhì)鋼。⑤專門用途的合金結(jié)構(gòu)鋼，鋼號冠以（或后綴）代表該鋼種用途的符號。例如鉚螺專用的30CrMnSi鋼，鋼號表示為ML30CrMnSi。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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20CrMnMo 產(chǎn)品詳細介紹： 詳細信息 規(guī)格 10-220 材質(zhì) 20CrMnMo 產(chǎn)地/廠家 冶鋼 分類 優(yōu)特鋼 結(jié)構(gòu)鋼 合結(jié)鋼 供應(yīng)20CrMnMo鋼號 規(guī)格 產(chǎn)地 可供數(shù)量（噸） 交貨地20CrMnMo 10-14圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 15圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 16圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 25圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 26圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 28圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 30圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 32圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 35圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 38圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 40圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 65圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 70圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 75圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 80圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 85圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 90圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 95圓 大冶/寶鋼/本鋼 30噸 上海寶山區(qū)20CrMnMo 100圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 105圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 110圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 120圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 130圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 140圓 大冶/寶鋼 30噸 上海寶山區(qū)20CrMnMo 150-200圓 大冶/寶鋼 30噸 上海寶山區(qū)
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