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.index-module_wrapperBg__OKK1h{background-image:url(https://baikebcs.bdimg.com/baike-common/sdks/drawer_bg_new.png);background-position:top;background-repeat:no-repeat;background-size:cover;height:871px;left:0;position:absolute;top:0;width:100%}.index-module_drawerHand__aRhcO{align-items:center;background-image:url(https://baikebcs.bdimg.com/baike-common/sdks/drawer_hand_bg.png);background-position:50%;background-repeat:no-repeat;background-size:contain;cursor:pointer;display:flex;height:72px;justify-content:center;position:fixed;right:0;top:50%;transform:translateY(-36px);transition:all .2s ease-in;width:20px}.index-module_drawerHand__aRhcO .index-module_taskLogo__71Tj5{height:66px;position:absolute;right:30px;top:0;width:66px}.index-module_drawerHand__aRhcO.index-module_open__qMl5O{right:480px}.index-module_reverse__OKr6k{transform:rotate(180deg)}網(wǎng)頁(yè)新聞貼吧知道網(wǎng)盤圖片視頻地圖文庫(kù)資訊采購(gòu)百科百度首頁(yè)登錄注冊(cè)進(jìn)入詞條全站搜索幫助首頁(yè)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+10G20CrNiMo播報(bào)上傳視頻合金滲碳鋼G20CrNiMo是一種常用的合金滲碳鋼，滲碳處理后表面有相當(dāng)高的硬度、耐磨性和接觸疲憊強(qiáng)度，同時(shí)心部還保留良好的韌性，能承受高的沖擊負(fù)荷。中文名G20CrNiMo標(biāo) 準(zhǔn)GB/T 3203-1982鋼牌號(hào)G20CrNiMo材料名稱(滲碳)軸承目錄1特性2用途3物理性能特性播報(bào)編輯G20CrNiMo鋼原系美國(guó)AISI、SAE標(biāo)準(zhǔn)中的鋼號(hào)8720。淬透性能與20CrNi鋼相近。雖然鋼中Ni含量為20CrNi鋼的一半，但由于加入少量Mo元素，使奧氏體等溫轉(zhuǎn)變曲線的上部往右移；又因適當(dāng)提高M(jìn)n含量，致使此鋼的淬透性仍然很好，強(qiáng)度也比20CrNi鋼高。常用于制造中小型汽車、拖拉機(jī)的發(fā)動(dòng)機(jī)和傳動(dòng)系統(tǒng)中的齒輪；亦可代替12CrNi3鋼制造要求心部性能較高的滲碳件、氰化件，如石油鉆探和冶金露天礦用的牙輪鉆頭的牙爪和牙輪體。 20CrNiMo因含有鉬除了有很好綜合性能外還能耐一定溫度。用于制造汽輪機(jī)的齒輪整轉(zhuǎn)子內(nèi)燃機(jī)連桿汽門截面鍛件等。用途播報(bào)編輯主要用作汽車軸承等耐沖擊、耐磨損零件的材料。常用于制造中小型汽車、拖拉機(jī)的發(fā)動(dòng)機(jī)和傳動(dòng)系統(tǒng)中的齒輪，也可代替12CrNi3鋼制造要求心部性能較高的滲碳件、氰化件，如石油鉆探和冶金露天礦用的牙爪和牙輪體。物理性能播報(bào)編輯化學(xué)成份碳 C ：0.17～0.23(答應(yīng)偏差:±0.02)硅 Si：0.15～0.40(答應(yīng)偏差:±0.03)錳 Mn：0.60～0.90(答應(yīng)偏差:±0.04)硫 S ：≤0.030(答應(yīng)偏差: 0.005)磷 P ：≤0.030(答應(yīng)偏差: 0.005)鉻 Cr：0.35～0.65(答應(yīng)偏差:±0.15)鎳 Ni：0.40～0.70(答應(yīng)偏差:±0.05)銅 Cu：≤0.25(答應(yīng)偏差：+0.05)鉬 Mo：0.15～0.30(答應(yīng)偏差:±0.02)力學(xué)性能抗拉強(qiáng)度 σb (MPa)：≥1176(120)伸長(zhǎng)率 δ5 (%)：≥9斷面收縮率 ψ (%)：≥45沖擊韌性值 αkv (J/cm2)：≥78(8)試樣尺寸：試樣尺寸為15mm [1]熱處理規(guī)范及金相組織熱處理規(guī)范：淬火,第一次880±20℃,第二次790±20℃,油冷;回火,150～200℃,空冷。 [2]金相組織：馬氏體。●交貨狀態(tài)：熱軋或鍛制鋼材以熱軋（鍛）狀態(tài)或退火狀態(tài)交貨。冷拉鋼材以退火狀態(tài)交貨。新手上路成長(zhǎng)任務(wù)編輯入門編輯規(guī)則本人編輯我有疑問(wèn)內(nèi)容質(zhì)疑在線客服官方貼吧意見(jiàn)反饋投訴建議舉報(bào)不良信息未通過(guò)詞條申訴投訴侵權(quán)信息封禁查詢與解封?2024?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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3077-1999用途20CrNiMo圓鋼的淬透性較高，無(wú)回火脆性，焊接性相當(dāng)好，形成冷裂的傾向很小，可切削性及冷應(yīng)變塑性良好。一般在調(diào)質(zhì)或滲碳淬火狀態(tài)下使用.主要特性20CrNiMo鋼原系美國(guó)AISI、SAE標(biāo)準(zhǔn)中的鋼號(hào)8620。淬透性能與20CrNi鋼相近。雖然鋼中Ni含量為20CrNi鋼的一半，但由于加入少量Mo元素，使奧氏體等溫轉(zhuǎn)變曲線的上部往右移；又因適當(dāng)提高M(jìn)n含量，致使此鋼的淬透性仍然很好，強(qiáng)度也比20CrNi鋼高。常用于制造中小型汽車、拖拉機(jī)的發(fā)動(dòng)機(jī)和傳動(dòng)系統(tǒng)中的齒輪；亦可代替12CrNi3鋼制造要求心部性能較高的滲碳件、氰化件，如石油鉆探和冶金露天礦用的牙輪鉆頭的牙爪和牙輪體。 20CrNiMo因含有鉬除了有很好綜合性能外還能耐一定溫度。用于制造汽輪機(jī)的齒輪整轉(zhuǎn)子內(nèi)燃機(jī)連桿汽門截面鍛件?；瘜W(xué)成分質(zhì)量分?jǐn)?shù)（%）：碳 C ：0.17～0.23硅 Si：0.17～0.37錳 Mn：0.60～0.95硫 S ：允許殘余含量≤0.035磷 P ：允許殘余含量≤0.035鉻 Cr：0.40～0.70鎳 Ni：0.25～0.75鉬 Mo：0.20～0.30銅 Cu：允許殘余含量≤0.30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：油回火加熱溫度（℃）：200；冷卻劑：空抗拉強(qiáng)度 σb (MPa)：≥980(100)屈服強(qiáng)度 σs (MPa)：≥785(80)伸長(zhǎng)率 δ5 (%)：≥9斷面收縮率 ψ (%)：≥40沖擊功 Akv (J)：≥47沖擊韌性值 αkv (J/cm2)：≥59(6)布氏硬度（HBS100/3000）（退火或高溫回火狀態(tài)）：≤197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。
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