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3077-2015目錄1基本信息?化學(xué)成分?鋼廠規(guī)格2力學(xué)性能3主要特性4加工工藝?材料加工?工藝規(guī)范5應(yīng)用舉例6計(jì)算公式基本信息播報(bào)編輯20Cr圖片AISI 5120JIS SCr420GB 20CrDIN 20Cr4供貨狀態(tài)及硬度：退火態(tài)，硬度≤179HBS化學(xué)成分（質(zhì)量分?jǐn)?shù)）（%）碳C：0.18～0.24硅Si：0.17～0.37錳Mn：0.50～0.8020Cr圖片鉻Cr：0.70～1.00硫 S ：允許殘余含量≤0.035磷 P ：允許殘余含量≤0.035鎳 Ni：允許殘余含量≤0.30銅 Cu：允許殘余含量≤0.30鉬 Mo：允許殘余含量≤0.15鋼廠規(guī)格20CrΦ30合金鋼鋼板1*1250*250020CrΦ35合金鋼鋼板8*1250*250020CrΦ40合金鋼鋼板2*1250*250020CrΦ45合金鋼鋼板2*1250*250020CrΦ45合金鋼鋼板2*1250*250020CrΦ50合金鋼鋼板8*1250*250020CrΦ60合金鋼鋼板0*1250*250020CrΦ65合金鋼鋼板8*1250*250020CrΦ70合金鋼鋼板6*1250*250020CrΦ80合金鋼鋼板8*1250*250020CrΦ90合金鋼鋼板7*1250*250020CrΦ100合金鋼鋼板10*1250*250020CrΦ110合金鋼鋼板10*1250*250020CrΦ130合金鋼鋼板12*1250*250020CrΦ120合金鋼鋼板15*1250*250020Cr130-300合金鋼鋼板10*1250*250020Cr1-50合金鋼鋼板20*1250*2500力學(xué)性能播報(bào)編輯試樣毛坯尺寸（mm）：15熱處理：第一次淬火加熱溫度（℃）：880；冷卻劑：水、油第二次淬火加熱溫度（℃）：780～820；冷卻劑：水、油回火加熱溫度（℃）：200；冷卻劑：水、空抗拉強(qiáng)度（σb/MPa）：≥835屈服點(diǎn)（σs/MPa）：≥540斷后伸長率（δ5/%）：≥10斷面收縮率（ψ/%）：≥40沖擊吸收功（Aku2/J）：≥47布氏硬度（HBS100/3000）（退火或高溫回火狀態(tài)）：≤179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。主要特性播報(bào)編輯與15Cr鋼相比，有較高的強(qiáng)度及淬透性，在油中臨界淬透直徑達(dá)4 ～22mm，在水中臨界淬透直徑達(dá)11～40mm，但韌性較差，此鋼滲碳時(shí)仍有晶粒長大傾向，降溫直接淬火對沖擊韌性影響較大，所以滲碳后需二次淬火以提高零件心部韌性，無回火脆性；鋼的冷應(yīng)變塑性高，可在冷狀態(tài)下拉絲；可切削性在高溫正火或調(diào)質(zhì)狀態(tài)下良好，但退火后較差；20Cr為珠光體，焊接性較好，焊后一般不需熱處理，但厚度大于15mm的零件在焊前需預(yù)熱到100～150℃，焊后也可不進(jìn)行回火熱處理。加工工藝播報(bào)編輯材料加工該鋼淬火、低溫回火后具有良好的綜合力學(xué)性能，低溫沖擊韌性良好，回火脆性不明顯。滲碳時(shí)鋼的晶粒有長大趨勢，所以要求二次淬火，以提高心部韌性，不宜降溫淬火。當(dāng)正火后硬度為170-217HB時(shí)，相對切屑加工性約為65%，焊接性中等，焊前應(yīng)預(yù)熱到100-150℃，冷變形時(shí)塑性中等。為了提高模具型腔的耐磨性，模具成型后需要進(jìn)行滲碳處理，然后再進(jìn)行淬火和低溫回火，從而保證模具表面具有很高硬度、高耐磨性而心部具有很好的韌性。對于使用壽命要求不很高的模具，也可以直接進(jìn)行調(diào)質(zhì)處理。國內(nèi)也有不少應(yīng)用低碳馬氏體剛強(qiáng)烈淬火制造冷作模具的實(shí)例。該鋼模具零件工藝路線：下料-鍛造模胚-退火-機(jī)械粗加工-冷擠壓成型-再結(jié)晶退火-機(jī)械精加工-滲碳-淬火、回火-研磨拋光-裝配。工藝規(guī)范正火規(guī)范:溫度920-950℃，硬度156-179HBS。冷壓毛胚軟化處理規(guī)范：溫度700~720℃，保溫時(shí)間8~15h，以50~100℃/h的冷速，隨爐降至溫度≤550~600℃，出爐空冷。處理前硬度≤179HBS，軟化后硬度≤140HBS。應(yīng)用舉例播報(bào)編輯這種鋼大多用于制造心部強(qiáng)度要求較高，表面承受磨損、截面在30mm以下的或形狀復(fù)雜而負(fù)荷不大的滲碳零件(油淬)，如：機(jī)床變速箱齒輪、齒輪軸、凸輪、蝸桿、活塞銷、爪形離合器等；對熱處理變形小和高耐磨性的零件，滲碳后應(yīng)進(jìn)行高頻表面淬火，如模數(shù)小于3的齒輪、軸、花鍵軸等。此鋼也可在調(diào)質(zhì)狀態(tài)下使用，用于制造工作速度較大并承受中等沖擊負(fù)荷的零件，這種鋼還可用作低碳馬氏體淬火用鋼，更進(jìn)一步增加鋼的屈服強(qiáng)度和抗拉強(qiáng)度(約增加1.5～1.7倍)。計(jì)算公式播報(bào)編輯◆扁鋼:每米重量(公斤)=0.00785×厚度×邊寬◆管材:每米重量(公斤)=0.02466×壁厚×(外徑-壁厚)◆棒材：直徑*直徑*長度*0.00623=kg/米（每米的重量）◆板材：長*寬*高*0.00785=kg/米（每米的重量）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?|?京ICP證030173號?京公網(wǎng)安備11000002000001號window.PAGE_DATA= 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規(guī)格 14-180 材質(zhì) 20Cr 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)20Cr鋼號 規(guī)格 產(chǎn)地 可供數(shù)量（噸） 交貨地20Cr 14圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 15圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 16圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 18圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 20圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 22圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 25圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 26圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 28圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 30圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 32圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 35圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 38圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 40圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 45圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 48圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 30圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 52圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 55圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 60圓 大冶/興澄 30噸 上海寶山區(qū)20Cr 95圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 120圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 130圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 140圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 150圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 160圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 170圓 興澄/本鋼 30噸 上海寶山區(qū)20Cr 180圓 興澄/本鋼 30噸 上海寶山區(qū)
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