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[1]。該材料在650℃以下服役時表現(xiàn)出優(yōu)異的高溫強度與抗蠕變性能，抗蒸汽氧化能力等同TP347H細晶鋼。通過優(yōu)化鈮含量和焊接工藝，其焊接接頭強度與母材一致且熱裂紋敏感性較低。相較于傳統(tǒng)合金，可減少26%管壁厚度，降低21%鋼材用量，顯著提升經(jīng)濟性。微觀組織分析顯示，時效處理后的基體析出8nm NbC相、35nm富Cu相及M23C6碳化物，形成復(fù)合強化效應(yīng)。中文名開發(fā)公司住友鋼鐵公司類 別奧氏體不銹鋼材料應(yīng) 用鍋爐過熱器和再熱器管目錄1成分2性能?機械性能?抗蒸氣氧化性能?耐高溫腐蝕性能?可焊性3經(jīng)濟性分析4應(yīng)用成分播報編輯(0.1C18Cr9Ni3CuNbN) 材料的化學(xué)成分如下：C為0.07%～0.13%; Si≤0.3%; Mn≤0.5%; P≤0.045%; S≤0.03%; Cr為17.0%～19.0%; Ni為7.5%～10.5%; Cu為2.5%～3.5%; Nb為0.3%～0.6%; N為0.05%～0.12%. [1]性能播報編輯機械性能由于氮的固溶加強影響, 強度和0. 2%彈性極限應(yīng)力高于普通的18Cr-8Ni 不銹鋼，韌性幾乎和TP347H一樣。抗蒸氣氧化性能細晶粒的抗蒸汽氧化性能和細晶粒TP347H相同, 細晶粒TP347H的該性能比TP321H更優(yōu)越。耐高溫腐蝕性能由于細晶粒結(jié)構(gòu)和Nb的增加, 耐熱腐蝕性能得到改善, 幾乎和細晶粒TP347H相同。可焊性通過適于檢測熱裂紋敏感性的可變約束抗熱裂試驗和約束裂紋試驗來評價的可焊性。的熱裂紋敏感性、裂紋長度和裂紋率低于TP347H?！∈覝睾透邷叵? 焊接點強度與母材相同。焊接用的填充金屬成分應(yīng)與相匹配。經(jīng)濟性分析播報編輯在高溫條件下具有優(yōu)良的性能, 能滿足超超臨界鍋爐所需在高參數(shù)下保持高機械強度的要求。在同樣的溫度和壓力下, 使用與超臨界使用的合金材料比較, 爐管壁厚大幅減少。因此, 相應(yīng)的單位長度重量明顯減少, 同樣受熱面積所用的鋼材隨其性能的提高而用量減少?！〉男詢r比比其他鋼材優(yōu)越, 可以大量使用。使用不僅在經(jīng)濟上有優(yōu)點, 而且, 由于管材壁厚減少降低了承壓部件的總重量, 減少了結(jié)構(gòu)承重和應(yīng)力、熱應(yīng)力等, 也減少了制造成本( 焊接、熱處理以及工藝難度等) 和施工的難度( 吊裝重量減少、機具用量減少等) 。從而給制造商帶來經(jīng)濟效益。應(yīng)用播報編輯( 0. 1C18Cr9Ni3CuNbN) 是一種用于高參數(shù)、超超臨界鍋爐受熱面管的新材料, 由于細銅相的沉淀強化作用和Nb成分的摻加, 增強了的蠕變斷裂強度, 在高溫下具有優(yōu)良的機械性能和抗蒸汽氧化和耐熱腐蝕的性能, 可以在650℃ 以下長期運行。 經(jīng)過多次現(xiàn)場測試， 結(jié)果表明: 可作為鍋爐過熱器和再熱器管長期使用， 其機械性能、蠕變斷裂性能、抗蒸汽氧化性能和焊接、彎曲等加工后的性能完全能滿足要求。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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Super304H Super304H鋼是一種新型的18-8奧氏體不銹鋼，主要用于制造金屬壁溫不超過700℃的超超臨界鍋爐的過熱器和再熱器。Super304H鋼是在TP304H的基礎(chǔ)上降低Mn含量，加入3%的Cu和0.45%的Nb及一定量的N，使該鋼在服役時產(chǎn)生彌散沉淀相和富銅強化相，富銅相與NbC(N)、NbCrN、M23C6一起產(chǎn)生極好的沉淀強化效果，大大提高了服役溫度下的許用應(yīng)力，600~650℃許用應(yīng)力比TP347H鋼高30%。該鋼的抗蒸汽氧化能力與TP347HFG鋼相當，明顯優(yōu)于TP321H鋼，現(xiàn)已列入ASME Code case 2328-1、ASTM A213和GB 5310-2008標準。 PRODUCT PARAMETERS 產(chǎn)品參數(shù) 化學(xué)成分 % C Mn P S Si Cr Ni N Nb Al B Cu Min 0.07 17.0 7.5 0.05 0.3 0.003 0.001 2.5 Max 0.13 1.0 0.04 0.01 0.3 19.0 10.5 0.12 0.6 0.03 0.01 3.5
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