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[2]。該鋼材通過冷擠壓工藝實(shí)現(xiàn)高精度公差控制，廣泛應(yīng)用于機(jī)床絲杠、花鍵軸、齒條等剛性要求高的精密零件制造 [3]。執(zhí)行標(biāo)準(zhǔn)GB/T 8731-2008交貨狀態(tài)熱軋/冷拉態(tài)硬度范圍179-229HB斷面收縮率≥20%表面光潔度▽級典型規(guī)格Φ3.0-Φ300mm目錄1化學(xué)成分設(shè)計(jì)2力學(xué)性能特征3加工工藝優(yōu)勢4典型應(yīng)用領(lǐng)域5質(zhì)量檢測標(biāo)準(zhǔn)6供應(yīng)鏈特征化學(xué)成分設(shè)計(jì)播報編輯碳含量為0.37%-0.45%，通過提高硫含量至0.20%-0.30%形成硫化錳夾雜物，切削時產(chǎn)生應(yīng)力集中效應(yīng)促使切屑脆斷。錳元素強(qiáng)化基體并提升淬透性，硅含量控制在0.15%-0.35%以保持材料塑性 [2-3]。磷含量≤0.04%避免冷脆性，該配比兼顧切削性與力學(xué)性能平衡。力學(xué)性能特征播報編輯熱軋狀態(tài)抗拉強(qiáng)度590-735MPa，伸長率≥14%；冷拉后經(jīng)高溫回火處理，抗拉強(qiáng)度提升至590-785MPa，伸長率達(dá)17%以上。硬度指標(biāo)根據(jù)加工狀態(tài)變化顯著：熱軋態(tài)≤207HB，冷拉態(tài)為179-229HB，滿足不同加工階段對材料剛性的需求 [2]。斷面收縮率≥20%的特性表明材料具有良好塑性變形能力。加工工藝優(yōu)勢播報編輯1.冷擠壓成型：采用冷拉工藝可獲得φ1.0-φ12mm精密圓鋼，尺寸公差控制在±0.05mm以內(nèi)，表面粗糙度Ra≤0.8μm [3]2.熱處理適應(yīng)性：支持退火、正火及高溫回火處理，冷拉態(tài)材料經(jīng)600-650℃回火后可消除內(nèi)應(yīng)力，改善切削加工性 [2]3.斷屑控制：硫化物分布均勻性使斷屑長度縮短50%-70%，精加工切削速度可達(dá)150m/min [2]典型應(yīng)用領(lǐng)域播報編輯機(jī)床部件：絲杠、光桿等長軸類零件，利用高剛性特征保證傳動精度 [1-2]傳動系統(tǒng)：花鍵軸、齒輪軸組件，冷拉材表面硬度229HB可承受高頻次摩擦 [3]連接部件：轉(zhuǎn)向拉桿螺栓、油泵傳動齒輪，材料抗拉強(qiáng)度735MPa滿足動態(tài)載荷需求 [2]精密儀器：手表齒輪、微型傳動軸，借助冷擠壓工藝實(shí)現(xiàn)高精度公差和光滑表面 [3]質(zhì)量檢測標(biāo)準(zhǔn)播報編輯根據(jù)GB/T 8731-2008規(guī)定，需檢測硫化物形態(tài)分布、非金屬夾雜物級別及帶狀組織評級。批量生產(chǎn)時要求橫向試樣斷后伸長率偏差≤3%，硬度波動范圍不超過15HB。表面質(zhì)量需滿足冷拉材無折疊、裂紋缺陷，熱軋材局部凹坑深度≤0.2mm。供應(yīng)鏈特征播報編輯主要生產(chǎn)企業(yè)包括寶鋼、貴鋼、鞍鋼等，提供3-100mm熱軋板及φ10-φ300mm冷拉棒材?，F(xiàn)貨庫存涵蓋φ3-φ100mm常用規(guī)格，特殊尺寸支持15天定制交付 [3]。材料以熱軋黑皮或冷拉磨光狀態(tài)交貨，附帶質(zhì)保書注明爐批號與化學(xué)成分。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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