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3077-1988國家標(biāo)準(zhǔn)的高級調(diào)質(zhì)結(jié)構(gòu)鋼，通過精準(zhǔn)的合金配比和熱處理工藝實現(xiàn)高強度與韌性的平衡。其碳含量為0.47%～0.54%，鉻、鎳元素分別控制在0.45%～0.75%與1.00%～1.40%區(qū)間，配合820℃油冷淬火與500℃回火工藝，使材料具備≥1080MPa抗拉強度和≥40%斷面收縮率 [1]。該材料廣泛應(yīng)用于重型機械關(guān)鍵部件制造，包括內(nèi)燃機曲軸、機床主軸等高負(fù)荷場景，其顯微組織均勻性可保障零件在復(fù)雜工況下的可靠性 [1]。材料類別合金結(jié)構(gòu)鋼執(zhí)行標(biāo)準(zhǔn)GB/T 3077-1988抗拉強度≥1080MPa屈服強度≥835MPa熱處理方式調(diào)質(zhì)處理典型硬度≤255HB目錄1化學(xué)成分2力學(xué)性能3熱處理工藝4加工特性5應(yīng)用領(lǐng)域6質(zhì)量控制化學(xué)成分播報編輯的合金成分經(jīng)精密設(shè)計，各元素含量范圍為 [1]：碳（C）：0.47%～0.54%（保障基體強度）硅（Si）：0.17%～0.37%（改善鑄造流動性）錳（Mn）：0.50%～0.80%（提升淬透性）鉻（Cr）：0.45%～0.75%（增強耐腐蝕性）鎳（Ni）：1.00%～1.40%（提高低溫韌性）磷（P）、硫（S）：≤0.035%（控制雜質(zhì)含量）銅（Cu）：≤0.030%（防止熱脆性）力學(xué)性能播報編輯經(jīng)過標(biāo)準(zhǔn)調(diào)質(zhì)處理后，材料達到以下性能指標(biāo) [1]：抗拉強度（σb）：≥1080MPa（相當(dāng)于155ksi）屈服強度（σs）：≥835MPa（約為120ksi）斷后伸長率（δ5）：≥8%（25mm標(biāo)距測試值）斷面收縮率（ψ）：≥40%（表征材料塑性）沖擊功（Akv）：≥39J（V型缺口試樣）布氏硬度：≤255HB（3000kg負(fù)荷測試）熱處理工藝播報編輯材料的熱處理過程分為兩個關(guān)鍵階段 [1]：淬火處理：將工件加熱至820℃并保溫，隨后采用油冷介質(zhì)快速冷卻，完成奧氏體向馬氏體的完全轉(zhuǎn)變回火處理：在500℃溫度下保溫后選擇水冷或油冷，通過碳化物析出消除淬火應(yīng)力，使硬度下降至設(shè)計范圍并提高尺寸穩(wěn)定性加工特性播報編輯該鋼材在加工過程中展現(xiàn)以下特點：熱加工溫度窗口為1100℃～850℃，在此區(qū)間具有良好塑性，可通過鍛造成型復(fù)雜零件冷加工時需控制單次變形量不超過15%，避免加工硬化導(dǎo)致的裂紋風(fēng)險切削加工性能優(yōu)良，建議采用高速鋼刀具配合乳化液冷卻應(yīng)用領(lǐng)域播報編輯憑借其綜合性能，主要應(yīng)用于 [1]：動力系統(tǒng)：柴油機曲軸、渦輪增壓器傳動軸（工作溫度-40℃～200℃）機床制造：5米以上立式車床主軸、齒輪加工中心傳動齒輪（模數(shù)≥10）工程機械：礦山破碎機偏心軸、盾構(gòu)機刀盤連接螺栓（抗疲勞壽命≥1×10^7次）特種設(shè)備：石油鉆探設(shè)備頂驅(qū)主軸、核電閥門閥桿（耐腐蝕要求≤0.1mm/年）質(zhì)量控制播報編輯生產(chǎn)過程中實施的質(zhì)量控制措施包括 [1]：采用真空脫氣冶煉技術(shù)，將氫氧含量分別控制在≤2ppm和≤20ppm實施超聲波探傷檢測，確保內(nèi)部缺陷當(dāng)量直徑≤φ2mm每批次進行金相組織檢驗，要求回火索氏體含量≥95%的圖片(1張)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= {"lemmaId":4640561,"lemmaTitle":"","lemmaDesc":"符合GB/T 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3077-1988)鋼 號 50CrNi特性及適用范圍:50CrNi是高級調(diào)質(zhì)結(jié)構(gòu)鋼，高強度、高塑性和韌性，熱處理后可得到均勻一致的顯微組織和力學(xué)性能。用于制造截面較大和重要的調(diào)質(zhì)零件，如內(nèi)燃機曲軸、重型機床中的主軸、齒輪、螺栓等?；拘畔⒅形拿Q50CrNi伸長率≥8 (%) 斷面收縮率≥40(%)沖擊功≥39 Akv (J)1介紹產(chǎn)品標(biāo)準(zhǔn):(GB/T 3077-1988)鋼 號 50CrNi特性及適用范圍:50CrNi是高級調(diào)質(zhì)結(jié)構(gòu)鋼，高強度、高塑性和韌性，熱處理后可得到均勻一致的顯微組織和力學(xué)性能。用于制造截面較大和重要的調(diào)質(zhì)零件，如內(nèi)燃機曲軸、重型機床中的主軸、齒輪、螺栓等。折疊編輯本段化學(xué)成分化學(xué)成分: ω/%C 0.47~0.54Si 0.17~0.37Mn 0.50~0.80S ≤0.035P ≤0.035Cr 0.45~0.75Ni 1.00~1.40Cu ≤0.030折疊編輯本段力學(xué)性能力學(xué)性能:抗拉強度 σb (MPa):≥1080(110)屈服強度 σs (MPa):≥835(85)沖擊韌性值 αkv (J/cm2):≥49(5)硬度 :≤255HB試樣尺寸:試樣毛坯尺寸為25mm折疊編輯本段熱處理工藝熱處理規(guī)范及金相組織:熱處理規(guī)范:淬火820℃,油冷;回火500℃,水冷、油冷。
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