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20MnSi合金圓鋼-合金結(jié)構(gòu)鋼
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[2]。作為Ⅱ級螺紋鋼筋，該材料通過表面肋紋設(shè)計增強(qiáng)與混凝土的粘結(jié)力，廣泛應(yīng)用于高層建筑、重型廠房等鋼筋混凝土結(jié)構(gòu) [3]。材質(zhì)類型錳硅系低合金鋼強(qiáng)度等級HRB335/RRB400 [2]執(zhí)行標(biāo)準(zhǔn)GB/T 1499.2-2007應(yīng)用場景建筑結(jié)構(gòu)受力鋼筋生產(chǎn)工藝余熱處理直徑范圍8-50毫米 [2]目錄1材料特性2生產(chǎn)工藝3應(yīng)用領(lǐng)域4技術(shù)參數(shù)5型號演變材料特性播報編輯屬于錳硅系低合金鋼，其合金成分中錳含量約0.7%-1.0%，硅含量0.5%-0.8%，碳含量0.17%-0.25%。相較于碳素結(jié)構(gòu)鋼，該材料屈服強(qiáng)度提升約20%，同時保持良好塑性和焊接性能 [2]。其應(yīng)力-應(yīng)變曲線具有明顯屈服平臺，延伸率δ≥17%，滿足建筑抗震設(shè)計要求。生產(chǎn)工藝播報編輯通過熱軋成型后立即進(jìn)行穿水急速冷卻處理，利用鋼材芯部余熱完成自回火，形成細(xì)晶粒組織。該工藝使表面形成回火馬氏體層，芯部保持鐵素體+珠光體結(jié)構(gòu)，實現(xiàn)強(qiáng)度與韌性的平衡。冷加工處理時，冷拉工藝可提升抗拉強(qiáng)度至455-510MPa但仍保留Ⅱ級鋼屬性，而冷拔工藝需重新分類為冷加工鋼材。應(yīng)用領(lǐng)域播報編輯在崇陽縣婦幼保健院等建筑工程中，采用E50系列焊條進(jìn)行HRB335()鋼筋焊接 [3]。主要應(yīng)用于：現(xiàn)澆混凝土梁柱節(jié)點的受力主筋高層建筑剪力墻分布鋼筋工業(yè)廠房預(yù)應(yīng)力構(gòu)件橋梁隧道結(jié)構(gòu)骨架其帶肋表面設(shè)計使粘結(jié)強(qiáng)度較光圓鋼筋提高2-3倍，確保結(jié)構(gòu)整體性 [2]。技術(shù)參數(shù)播報編輯根據(jù)《鋼筋混凝土用鋼》標(biāo)準(zhǔn)要求：屈服強(qiáng)度：≥335MPa（標(biāo)準(zhǔn)值） [1-2]抗拉強(qiáng)度：≥455MPa [2]彈性模量：2.0×10?N/mm2 [1]彎曲性能：180°冷彎試驗無裂紋重量偏差：直徑≤12mm允差±7%，14-20mm允差±5% [2]型號演變播報編輯在2018年標(biāo)準(zhǔn)修訂后，牌號HRB335逐步被HRB400替代，但仍允許按設(shè)計要求使用。部分工程圖紙中沿用老牌號標(biāo)注，需注意與HRB335（）的性能差異 [2]。余熱處理工藝生產(chǎn)的RRB400級鋼筋仍保持材質(zhì)標(biāo)注體系。的圖片(2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= 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20MnSi 20MnSi是強(qiáng)度高和綜合性能好的鋼種，是一種建筑材料。中文名 20MnSi 屬 性 建筑材料 狀態(tài)： 熱軋 、冷軋 形態(tài)： 螺紋鋼筋 、冷軋鋼帶特性應(yīng)用20MnSi是建筑材料，20MnSi是強(qiáng)度高和綜合性能好的鋼種?？捎糜阡摻Y(jié)構(gòu)制作、建筑業(yè)、機(jī)器零部件及各類標(biāo)準(zhǔn)件的制作?；瘜W(xué)成分20MnSi碳(C)0.17-0.2320MnSi20MnSi [1]錳(Mn)1.30-1.70鎳(Ni)≤0.030硅(Si) 0.40-0.70磷(P)≤0.045硫(S)≤0.045鉻(Cr)≤0.030銅(Cu)≤0.030C+16Mn≤0.520mnsi為老國家標(biāo)準(zhǔn)，現(xiàn)為建筑用鋼筋混凝土用鋼第二部分，熱軋帶肋鋼筋。
滬ICP備2021035645號
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