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45CRNI合金圓鋼-合金結(jié)構(gòu)鋼
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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+10播報討論上傳視頻合金結(jié)構(gòu)鋼的牌號是中國國家標準（GB/T 3077-2015）中的合金結(jié)構(gòu)鋼牌號，統(tǒng)一數(shù)字代號A40452，對應美國牌號3140、英國牌號640M40、法國牌號35NC6。其碳含量為0.42%–0.49%（“45”表示平均碳含量0.45%），主要合金元素包括鉻（0.45%–0.75%）和鎳（1.00%–1.40%） [1-2]。該材料經(jīng)820℃油淬及530℃回火處理后，抗拉強度≥980MPa，屈服強度≥785MPa，斷后伸長率≥10%，斷面收縮率≥45%，布氏硬度≤255HBS。因含碳量略高于40CrNi，其強度和淬透性有所提升，適用于制造內(nèi)燃機曲軸、汽車/拖拉機主軸、連桿、氣門等高強度調(diào)質(zhì)件，并應用于寒區(qū)工程機械及特種裝備 [1-2]。產(chǎn)品形態(tài)包括圓鋼、鍛材等，規(guī)格覆蓋φ16mm至φ220mm [2]。中文名對應美國牌號-3140對應英國牌號640M40對應法國牌號35NC6目錄1基本信息2化學成分3力學性能4主要特性5應用舉例6表示方法基本信息播報編輯對應美國牌號：-3140對應英國牌號：640M40對應法國牌號：35NC6化學成分播報編輯質(zhì)量分數(shù)（%）：C：0.42～0.49Si：0.17～0.37合金鋼Mn：0.50～0.80Cr：0.45～0.75Ni：1.00～1.40力學性能播報編輯【試樣毛坯尺寸】25mm【熱處理】淬火加熱溫度（℃）：820；冷卻劑：油回火加熱溫度（℃）：530；冷卻劑：水、油【力學性能】抗拉強度（σb/MPa）：≧980屈服點（σs/MPa）：≧785斷后伸長率（δ5/%）：≧10合金結(jié)構(gòu)鋼斷面收縮率（ψ/%）：≧45沖擊吸收功（Aku2/J）：≧55布氏硬度（HBS100/3000）（退火或高溫回火狀態(tài)）：≦255主要特性播報編輯性能和40CrNi相近，由于含碳量高，因而其強度和淬透性均稍有提高。 [1]應用舉例播報編輯用于制造各種重要的調(diào)質(zhì)件，與40CrNi用途相近。如制造內(nèi)燃機曲軸、汽車和拖拉機主軸、連桿、氣門及螺栓等。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。當平均合金含量＜1.5%時，鋼號中一般只標出元素符號，而不標明含量，但在特殊情況下易致混淆者，在元素符號后亦可標以數(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。當合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時，在元素符號后面應標明含量，可相應表示為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，仍應在鋼號中標出。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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45CrNi，是中國國家標準規(guī)定的一種合金結(jié)構(gòu)鋼的牌號。統(tǒng)一數(shù)字代號:A40452。對應美國牌號-3140對應英國牌號640M40質(zhì)量分數(shù)(%):C:0.42~0.49Si:0.17~0.37Mn:0.50~0.80Cr:0.45~0.75Ni:1.00~1.40【試樣毛坯尺寸】25mm【熱處理】淬火加熱溫度(℃):820;冷卻劑:油回火加熱溫度(℃):530;冷卻劑:水、油【力學性能】抗拉強度(σb/MPa):≧980屈服點(σs/MPa):≧785斷后伸長率(δ5/%):≧10斷面收縮率(ψ/%):≧4545CrNi合金結(jié)構(gòu)鋼45CrNi合金結(jié)構(gòu)鋼沖擊吸收功(Aku2/J):≧55布氏硬度(HBS100/3000)(退火或高溫回火狀態(tài)):≦255折疊編輯本段主要特性性能和40CrNi相近，由于含碳量高，因而其強度和淬透性均稍有提高。折疊編輯本段應用舉例用于制造各種重要的調(diào)質(zhì)件，與40CrNi用途相近。如制造內(nèi)燃機曲軸、汽車和拖拉機主軸、連桿、氣門及螺栓等。折疊編輯本段表示方法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。當平均合金含量<1.5%時，鋼號中一般只標出元素符號，而不標明含量，但在特殊情況下易致混淆者，在元素符號后亦可標以數(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。當合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時，在元素符號后面應標明含量，可相應表示為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，仍應在鋼號中標出。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。
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