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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+1025Cr2MoVA播報討論上傳視頻金屬材料25Cr2MoVA是中國國家標準（GB）中的一種中碳合金耐熱鋼，屬于鉻鉬釩系合金結(jié)構(gòu)鋼。其碳含量為0.22%-0.29%，主要合金元素包括鉻（1.50%-1.80%）、鉬（0.25%-0.35%）和釩（0.15%-0.30%），兼具高強度、高韌性和良好的高溫穩(wěn)定性。鋼號命名規(guī)則直接反映成分特征：前兩位數(shù)字表示平均碳含量萬分比，元素符號后數(shù)字對應合金含量百分比，末尾“A”代表高級優(yōu)質(zhì)鋼 [1]。該材料經(jīng)調(diào)質(zhì)、正火及高溫回火處理后，屈服強度≥785MPa，斷后伸長率≥14%，適用于550℃以下高溫螺母、530℃以下螺栓螺柱以及汽輪機轉(zhuǎn)子、閥門等機械部件。在低于500℃環(huán)境下表現(xiàn)出優(yōu)異的高溫性能，但焊接性較差，長期工作溫度建議不超過510℃。其抗蠕變性能在500℃以下工況表現(xiàn)穩(wěn)定，但超過該溫度時建議選用更高性能材料 [2]。25Cr2MoVA通過油淬和空冷回火工藝可實現(xiàn)布氏硬度≤241HBS，廣泛應用于電力、石化領域的高溫高壓緊固件及閥門制造。鉻元素提升抗氧化能力，鉬強化蠕變強度，釩改善組織穩(wěn)定性，共同保障材料在高溫環(huán)境下的可靠性。中文名25Cr2MoVA標 準GB/T3077-1999統(tǒng)一數(shù)字代號A31253抗拉強度≧930目錄1簡介?化學成分?力學性能2主要特性?應用舉例?名稱由來3鋼廠現(xiàn)貨規(guī)格4合金鋼的材質(zhì)簡介播報編輯25Cr2MoVA，。25Cr2MoVA化學成分C：0.22～0.29Si：0.17～0.37Mn：0.40～0.70Cr：1.50～1.80Mo：0.25～0.35V：0.15～0.30力學性能【試樣毛坯尺寸】25mm【熱處理】淬火加熱溫度（℃）：900；冷卻劑：油回火加熱溫度（℃）：640；冷卻劑：空【力學性能】屈服點（σs/MPa）：≧785斷后伸長率（δ5/%）：≧14斷面收縮率（ψ/%）：≧5525Cr2MoVA沖擊吸收功（Aku2/J）：≧63布氏硬度（HBS100/3000）（退火或高溫 回火狀態(tài)）：≦241主要特性播報編輯一般可在調(diào)質(zhì)狀態(tài)下使用，也可在正火及高溫回火后使用。應用舉例用于制造高溫條件下的螺母（小于或等于550℃）、螺栓、螺柱（小于530℃），長期工作溫度至510℃的緊固件，汽輪機整體轉(zhuǎn)子、套筒、主汽閥、調(diào)節(jié)閥，還可作為滲氮鋼，用以制作閥桿、齒輪等。名稱由來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。合金管與無縫管兩者既有關系又有區(qū)別，不能混為一談。合金管是鋼管按照生產(chǎn)用料（也就是材質(zhì)）來定義的，顧名思義就是合金做的管子；而無縫管是鋼管按照生產(chǎn)工藝（有縫無縫）來定義的，區(qū)別于無縫管的就是有縫管，包括直縫焊管和螺旋管。鋼廠現(xiàn)貨規(guī)格播報編輯25Cr2MoVAΦ3018.248東北特鋼上海合金鋼25Cr2MoVAΦ3517.638東北特鋼上海合金鋼25Cr2MoVAΦ4012.827東北特鋼上海合金鋼25Cr2MoVAΦ4515.849東北特鋼上海合金鋼25Cr2MoVAΦ4518.725東北特鋼上海合金鋼25Cr2MoVAΦ5016.145東北特鋼上海合金鋼25Cr2MoVAΦ6018.122東北特鋼上海合金鋼25Cr2MoVAΦ6518.61東北特鋼上海合金鋼25Cr2MoVAΦ7018.725東北特鋼上海合金鋼25Cr2MoVAΦ8018.725東北特鋼上海合金鋼25Cr2MoVAΦ9018.08東北特鋼上海合金鋼25Cr2MoVAΦ10019.235東北特鋼上海合金鋼25Cr2MoVAΦ11021.77東北特鋼上海合金鋼25Cr2MoVAΦ13014.635東北特鋼上海合金鋼25Cr2MoVAΦ12014.12東北特鋼上海合金鋼25Cr2MoVAΦ13012.03東北特鋼上海合金鋼25Cr2MoVAΦ14013.645東北特鋼上海合金鋼合金鋼的材質(zhì)播報編輯35CrMo、16-50Mn、27SiMn、40Cr、Cr5Mo 12Cr1MoV 12Cr1MovG 15CrMo 15CrMoG 15CrMoV 13CrMo44 T91 27SiMn 25CrMo 30CrMo 35CrMoV 40CrMo 45CrMo 20G Cr9Mo 10CrMo910 15Mo3 A335P11. 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