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        建筑鋼材種類有哪些【轉載】
        發布日期:2018-01-21       點擊數:221       
        鋼材應用廣泛,種類繁多,現在根據建筑對鋼材的需求,我們可以將建筑鋼材按照不同的規格進行分類,其主要分為以下七大種類:
        ?
        1、按品質分類
        ?
        (1) 普通鋼(P≤0.045%,S≤0.050%);
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        (2) 優質鋼(P、S均≤0.035%);
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        (3) 高級優質鋼(P≤0.035%,S≤0.030%)。
        ?
        2、按化學成份分類
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        (1) 碳素鋼:低碳鋼(C≤0.25%);中碳鋼(C≤0.25-0.60%);高碳鋼(C≥0.60%)。
        ?
        (2) 合金鋼:低合金鋼(合金元素總含量≤5%);中合金鋼(合金元素總含量>5-10%);高合金鋼(合金元素總含量>10%)。
        ?
        3、按成形方法分類:?(1) 鍛鋼 (2) 鑄鋼 (3) 熱軋鋼 (4) 冷拉鋼。
        ?
        4、按金相組織分類
        ?
        (1) 退火狀態的:亞共析鋼(鐵素體+珠光體);共析鋼(珠光體);過共析鋼(珠光體+滲碳體);萊氏體鋼(珠光體+滲碳體);
        ?
        (2) 正火狀態的:珠光體鋼;貝氏體鋼;馬氏體鋼;奧氏體鋼。
        ?
        (3) 無相變或部分發生相變的。
        ?
        5、按用途分類
        ?
        (1) 建筑及工程用鋼:普通碳素結構鋼;低合金結構鋼;鋼筋鋼。
        ?
        (2) 結構鋼;
        ?
        (3) 工具鋼:碳素工具鋼;合金工具鋼;高速工具鋼。
        ?
        (4) 特殊性能鋼:不銹耐酸鋼;耐熱鋼:包括抗氧化鋼、熱強鋼、氣閥鋼;電熱合金鋼;耐磨鋼;低溫用鋼;電工用鋼。
        ?
        (5) 專業用鋼: 如橋梁用鋼、船舶用鋼、鍋爐用鋼、壓力容器用鋼、農機用鋼等。
        ?
        6、綜合分類:(1)普通鋼 (2)優質鋼(包括高級優質鋼)。
        ?
        7、按冶煉方法分類
        ?
        (1) 按爐種分:a.平爐鋼 b.轉爐鋼 c. 電爐鋼。
        ?
        (2)按脫氧分:沸騰鋼;半鎮靜鋼;鎮靜鋼;特殊鎮靜鋼。
        华人彩
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