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40MNB合金圓鋼-合金結(jié)構(gòu)鋼
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3077-1988標(biāo)準(zhǔn)，統(tǒng)一數(shù)字代號A71402。該鋼種碳含量0.37%-0.44%、錳1.10%-1.40%，并通過添加微量硼元素提升淬透性，油中臨界淬透直徑達(dá)18-33mm，主要應(yīng)用于汽車轉(zhuǎn)向節(jié)、半軸及機(jī)床齒輪等中等負(fù)荷機(jī)械部件制造。其抗拉強(qiáng)度≥980MPa、屈服強(qiáng)度≥785MPa，經(jīng)550-570℃回火可獲得最佳綜合力學(xué)性能。相較于40Cr鋼，具有更優(yōu)的可切削性及淬透性，正火后硬度低于160HBS時(shí)加工性能顯著改善 [1]，適用于調(diào)質(zhì)、高頻淬火等工藝以滿足不同工況需求。該材料存在回火脆性缺陷，使用溫度范圍為-20℃至425℃，軋材涵蓋Φ20-Φ80mm等多規(guī)格，可替代較大截面40Cr鋼零件。中文名外文名標(biāo) 準(zhǔn)GB/T 3077-1988統(tǒng)一數(shù)字代號A71402硼 B0.0005～0.0035沖擊功Akv (J)：≥47目錄1產(chǎn)品介紹2產(chǎn)品特性3產(chǎn)品用途4化學(xué)成份5力學(xué)性能6主要特性7應(yīng)用舉例產(chǎn)品介紹播報(bào)編輯，合金結(jié)構(gòu)鋼。產(chǎn)品特性播報(bào)編輯中碳調(diào)制鋼，冷鐓模具鋼。該鋼價(jià)格適中，加工容易，經(jīng)適當(dāng)?shù)臒崽幚硪院罂色@得一定的韌性、塑性和耐磨性。正火可促進(jìn)組織球化，改進(jìn)硬度小于160HBS毛坯的切削性能。在溫度550~570℃進(jìn)行回火，該鋼具有最佳的綜合力學(xué)性能。該鋼的淬透性高于45鋼，適合于高頻淬火，火焰淬火等表面硬化處理等。產(chǎn)品用途播報(bào)編輯用作汽車上的轉(zhuǎn)向臂、轉(zhuǎn)向節(jié)、轉(zhuǎn)向軸、半軸、蝸桿、花鍵軸、剎車調(diào)整臂等，也可代替40Cr鋼制造較大截面的零件。這種鋼經(jīng)調(diào)質(zhì)后用于制造承受中等負(fù)荷及中等速度工作的機(jī)械零件，如汽車的轉(zhuǎn)向節(jié)、后半軸以及機(jī)床上的齒輪、軸、蝸桿、花鍵軸、頂尖套等；經(jīng)淬火及中溫回火后用于制造承受高負(fù)荷、沖擊及中等速度工作的零件，如齒輪、主軸、油泵轉(zhuǎn)子、滑塊、套環(huán)等；經(jīng)淬火及低溫回火后用于制造承受重負(fù)荷、低沖擊及具有耐磨性、截面上實(shí)體厚度在25mm以下的零件，如蝸桿、主軸、軸、套環(huán)等；經(jīng)調(diào)質(zhì)并高頻表面淬火后用于制造具有高的表面硬度及耐磨性而無很大沖擊的零件，如齒輪、套筒、軸、主軸、曲軸、心軸、銷子、連桿、 螺釘、螺帽、進(jìn)氣閥等。此外，這種鋼又適于制造進(jìn)行碳氮共滲處理的各種傳動零件，如直徑較大和低溫韌性好的齒輪和軸|Φ20 （軋材）|Φ30 （軋材）|Φ40 （軋材）|Φ50 （軋材）|Φ60 （軋材）|Φ70 （軋材）|Φ80 （軋材）化學(xué)成份播報(bào)編輯碳 C ：0.37～0.44硅 Si：0.17～0.37錳 Mn：1.10～1.40硫 S ：允許殘余含量≤0.035磷 P ：允許殘余含量≤0.035鉻 Cr：允許殘余含量≤0.30鎳 Ni：允許殘余含量≤0.30銅 Cu：允許殘余含量≤0.20硼 B: 0.0005~0.0035力學(xué)性能播報(bào)編輯試樣毛坯尺寸（mm）：25熱處理：第一次淬火加熱溫度（℃）：850；冷卻劑：油第二次淬火加熱溫度（℃）：-回火加熱溫度（℃）：500；冷卻劑：水、油抗拉強(qiáng)度 σb (MPa)：≥980(100)屈服強(qiáng)度 σs (MPa)：≥785(80)伸長率 δ5 (%)：≥10斷面收縮率 ψ (%)：≥45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)）：≤207主要特性播報(bào)編輯這是一種取代40Cr鋼比較成功的新鋼種，它具有較高的強(qiáng)度、硬度、耐磨性及良好的韌性，其淬透性較40Cr稍高，在油中臨界淬透直徑達(dá)18～33mm；正火后可切削性良好，冷拔、滾絲、攻絲和鍛造、熱處理工藝性能也都較好，高溫下晶粒長大、氧化、脫碳傾向及淬火變形傾向均較?。坏谢鼗鸫嘈?，回火穩(wěn)定性比40Cr鋼稍差。應(yīng)用舉例播報(bào)編輯此鋼一般在調(diào)質(zhì)狀態(tài)下使用，使用溫度范圍在-20～425℃，主要代替40Cr鋼制作中、 小截面的調(diào)質(zhì)零件，如汽車半軸、轉(zhuǎn)向軸、蝸桿、花鍵軸和機(jī)床主軸、齒輪等。此外亦可代替40Cr鋼制作Φ250～320mm卷揚(yáng)機(jī)中間軸等較大截面的零件。當(dāng)制作尺寸較小的零件時(shí)此鋼亦可代替40CrNi鋼使用。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(bào)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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統(tǒng)一數(shù)字代號A71402 硼B(yǎng)0.0005~0.0035沖擊功Akv (J):≥41概述40MnB，合金結(jié)構(gòu)鋼。折疊編輯本段特性中碳調(diào)制鋼，冷鐓模具鋼。該鋼價(jià)格適中，加工容易，經(jīng)適當(dāng)?shù)臒崽幚硪院罂色@得一定的韌性、塑性和耐磨性。正火可促進(jìn)組織球化，改進(jìn)硬度小于160HBS毛坯的切削性能。在溫度550~570℃進(jìn)行回火，該鋼具有最佳的綜合力學(xué)性能。該鋼的淬透性高于45鋼，適合于高頻淬火，火焰淬火等表面硬化處理等。折疊編輯本段用途用作汽車上的轉(zhuǎn)向臂、轉(zhuǎn)向節(jié)、轉(zhuǎn)向軸、半軸、蝸桿、花鍵軸、剎車調(diào)整臂等，也可代替40Cr鋼制造較大截面的零件。這種鋼經(jīng)調(diào)質(zhì)后用于制造承受中等負(fù)荷及中等速度工作的機(jī)械零件，如汽車的轉(zhuǎn)向節(jié)、后半軸以及機(jī)床上的齒輪、軸、蝸桿、花鍵軸、頂尖套等;經(jīng)淬火及中溫回火后用于制造承受高負(fù)荷、沖擊及中等速度工作的零件，如齒輪、主軸、油泵轉(zhuǎn)子、滑塊、套環(huán)等;經(jīng)淬火及低溫回火后用于制造承受重負(fù)荷、低沖擊及具有耐磨性、截面上實(shí)體厚度在25mm以下的零件，如蝸桿、主軸、軸、套環(huán)等;經(jīng)調(diào)質(zhì)并高頻表面淬火后用于制造具有高的表面硬度及耐磨性而無很大沖擊的零件，如齒輪、套筒、軸、主軸、曲軸、心軸、銷子、連桿、 螺釘、螺帽、進(jìn)氣閥等。此外，這種鋼又適于制造進(jìn)行碳氮共滲處理的各種傳動零件，如直徑較大和低溫韌性好的齒輪和軸40MnB|Φ20 (軋材)40MnB|Φ30 (軋材)40MnB|Φ40 (軋材)碳 C :0.37~0.44硅 Si:0.17~0.37錳 Mn:1.10~1.40硫 S :允許殘余含量≤0.35磷 P :允許殘余含量≤0.35鉻 Cr:允許殘余含量≤0.30鎳 Ni:允許殘余含量≤0.30銅 Cu:允許殘余含量≤0.30折疊編輯本段力學(xué)性能試樣毛坯尺寸(mm):25熱處理:第一次淬火加熱溫度(℃):850;冷卻劑:油第二次淬火加熱溫度(℃):-回火加熱溫度(℃):500;冷卻劑:水、油抗拉強(qiáng)度 σb (MPa):≥980(100)屈服強(qiáng)度 σs (MPa):≥785(80)伸長率 δ5 (%):≥10斷面收縮率 ψ (%):≥45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)):≤207
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