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20CRNI合金圓鋼-合金結(jié)構(gòu)鋼

專業(yè)為您提供合金結(jié)構(gòu)鋼牌號(hào)，材質(zhì)單，在線報(bào)價(jià)單歡迎選購(gòu)

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個(gè)人中心收藏查看我的收藏0有用+10播報(bào)討論上傳視頻用于制造高負(fù)荷下工作的大型重要滲碳等的零件合金結(jié)構(gòu)鋼執(zhí)行標(biāo)準(zhǔn)：GB/T 3077-1988 牌號(hào)：統(tǒng)一數(shù)字代號(hào)A40202合金鋼具有良好的加工性，加工變形微小，抗疲勞性能相當(dāng)好。用于制造高負(fù)荷下工作的大型重要滲碳零件，制造拉桿、重要的焊接和沖壓零件、高強(qiáng)度的結(jié)構(gòu)件。如齒輪.鍵.對(duì)軸.活塞銷.花鍵軸等；也可用作具有高沖擊韌性的調(diào)質(zhì)零件。中文名
執(zhí)行標(biāo)準(zhǔn)GB/T 3077-1988
牌號(hào)
數(shù)字代號(hào)A40202

目錄
1化學(xué)成份2力學(xué)性能3熱處理規(guī)范4表示方法
化學(xué)成份
播報(bào)編輯碳 C ：0.17～0.23硅 Si：0.17～0.37錳 Mn：0.40～0.70硫 S 允許殘余含量≤0.035磷 P 允許殘余含量≤0.035鉻 Cr：0.70～1.00 鎳鎳Ni：1.00～1.40銅 Cu：允許殘余含量≤0.030
力學(xué)性能
播報(bào)編輯抗拉強(qiáng)度 σb (MPa)：≥785(80)屈服強(qiáng)度 σs (MPa)：≥590(60)伸長(zhǎng)率 δ5 (%)：≥10斷面收縮率 ψ (%)：≥50沖擊功 Akv (J)：≥63沖擊韌性值 αkv (J/cm2)≥78(8)硬度：≤197HB試樣尺寸：試樣毛坯尺寸為25mm
熱處理規(guī)范
播報(bào)編輯●熱處理規(guī)范及金相組織：熱處理規(guī)范：淬火850℃,水冷、油冷;回火460℃,水冷、油冷?！窠回洜顟B(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。
表示方法
播報(bào)編輯① 鋼號(hào)開(kāi)頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，如40Cr、25Cr2MoVA合金管。 ②鋼中主要合金元素，除個(gè)別微合金元素外，一般以百分之幾表示。當(dāng)平均合金含量＜1.5%時(shí)，鋼號(hào)中一般只標(biāo)出元素符號(hào)，而不標(biāo)明含量，但在特殊情況下易致混淆者，在元素符號(hào)后亦可標(biāo)以數(shù)字"1"，例如鋼號(hào)"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(dāng)合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時(shí)，在元素符號(hào)后面應(yīng)標(biāo)明含量，可相應(yīng)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(yīng)在鋼號(hào)中標(biāo)出。例如20MnVB鋼中。釩為0.07-0.12%，硼為0.001-0.005%。④高級(jí)優(yōu)質(zhì)鋼應(yīng)在鋼號(hào)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(hào)冠以（或后綴）代表該鋼種用途的符號(hào)。例如鉚螺專用的30CrMnSi鋼，鋼號(hào)表示為ML30CrMnSi。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?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(tái)?|?京ICP證030173號(hào)?京公網(wǎng)安備11000002000001號(hào)window.PAGE_DATA= 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允許殘余含量≤0.035磷 P 允許殘余含量≤0.035鉻 Cr:0.70~1.00 鎳鎳Ni:1.00~1.40銅 Cu:允許殘余含量≤0.030折疊編輯本段力學(xué)性能抗拉強(qiáng)度 σb (MPa):≥785(80)屈服強(qiáng)度 σs (MPa):≥590(60)伸長(zhǎng)率 δ5 (%):≥10斷面收縮率 ψ (%):≥50沖擊功 Akv (J):≥63沖擊韌性值 αkv (J/cm2)≥78(8)硬度 :≤197HB試樣尺寸:試樣毛坯尺寸為25mm折疊編輯本段熱處理規(guī)范●熱處理規(guī)范及金相組織:熱處理規(guī)范:淬火850℃,水冷、油冷;回火460℃,水冷、油冷?！窠回洜顟B(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。折疊編輯本段20crni表示方法① 鋼號(hào)開(kāi)頭的兩位數(shù)字表示鋼的碳含量，以平均碳含量的萬(wàn)分之幾表示，如40Cr、25Cr2MoVA合金管 ②鋼中主要合金元素，除個(gè)別微合金元素外，一般以百分之幾表示。當(dāng)平均合金含量<1.5%時(shí)，鋼號(hào)中一般只標(biāo)出元素符號(hào)，而不標(biāo)明含量，但在特殊情況下易致混淆者，在元素符號(hào)后亦可標(biāo)以數(shù)字"1"，例如鋼號(hào)"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(dāng)合金元素平均含量≥1.5%、≥2.5%、≥3.5%……時(shí)，在元素符號(hào)后面應(yīng)標(biāo)明含量，可相應(yīng)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(yīng)在鋼號(hào)中標(biāo)出。例如20MnVB鋼中。釩為0.07-0.12%，硼為0.001-0.005%。④高級(jí)優(yōu)質(zhì)鋼應(yīng)在鋼號(hào)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(hào)冠以(或后綴)代表該鋼種用途的符號(hào)。例如鉚螺專用的30CrMnSi鋼，鋼號(hào)表示為ML30CrMnSi。

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