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    一組圖看懂不銹鋼
    來源: | 作者:pro3c65e5 | 發布時間: 2017-09-06 | 3776 次瀏覽 | 分享到:
    不銹鋼具有良好的耐腐蝕性、較高的塑性和韌性,廣泛應用于機械、石油、化工、食品、醫藥等行業。不銹鋼是一個范圍很大的特殊鋼系列,僅我國生產的不銹鋼鋼號就有一百個以上,有著不同的性能和用途。
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼

    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼
    一組圖看懂不銹鋼一組圖看懂不銹鋼一組圖看懂不銹鋼一組圖看懂不銹鋼一組圖看懂不銹鋼一組圖看懂不銹鋼一組圖看懂不銹鋼

    不銹鋼加工特點:

    1. 加工硬化嚴重:在不銹鋼中,以奧氏體和雙相(奧氏體 鐵素體)不銹鋼的加工硬化現象最為突出.因為不銹鋼的塑性大,塑性變形時晶格歪扭,強化系數很大;且奧氏體不夠穩定,在切削應力的作用下,部分奧氏體會轉變為馬氏體;再加上化合物雜質在切削熱的作用下,易于分解呈彌散分布,使切削加工時產生硬化層. 

    2. 切削力大:不銹鋼在切削過程中塑性變形大,尤其是奧氏體不銹鋼(其伸長率超過45號鋼的1.5倍以上),使切削力增加.同時,不銹鋼的加工硬化嚴重,熱強度高,進一步增大了切削抗力,切屑的卷曲折斷也比較困難.

    3. 切削溫度高:切削時塑性變形及與刀具間的摩擦都很大,產生的切削熱多;大量切削熱都集中在切削區和刀削接觸的界面上,散熱條件差.在相同的條件下切削溫度比45號鋼高200℃左右.

    4. 切削不易折斷、易粘結:不銹鋼的塑性、韌性都很大,在高溫、高壓下,不銹鋼與其他金屬的親和性強,易產生粘附現象,并形成積削瘤,既加劇刀具磨損,又會出現撕扯現象而使已加工表面惡化.含碳量較低的馬氏體不銹鋼的這一特點更為明顯.

    5. 刀具易磨損:切削不銹鋼過程中的親和作用,使刀削間產生粘結、擴散,從而使刀具產生粘結磨損、擴散磨損,致使刀具前刀面產生月牙洼,切削刃還會形成微小的剝落和缺口;加上不銹鋼中的碳化物(如TiC)微粒硬度很高,切削時直接與刀具接觸、摩擦,擦傷刀具,還有加工硬化現象,均會使刀具磨損加劇.


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