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陶瓷數控刀具都有哪些優缺點?

陶瓷數控工具的優點和缺點是什么?

陶瓷數控刀具都有哪些優缺點?的問題共有1個回答

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陶瓷刀具材料的主要優點是:有很高的硬度與耐磨性,常溫硬度達91~95HRC;有很高的耐熱性,在1200℃高溫下硬度為80HRC;而且高溫條件下抗彎強度、韌性降低極少;有很高的化學穩定性,陶瓷與金屬親和力小,高溫抗氧化性能好,即使在熔化溫度下也不與鋼相互作用。因而刀具的粘結、擴散、氧化磨損較少;有較低的摩擦系數,切屑不易粘刀,不易產生積屑瘤。陶瓷刀的缺點是:脆性大,強度與韌性低,抗彎強度只有硬質合金的1/2~1/5,因此使用時必須選擇合適的幾何參數與切削用量;避免承受沖擊負荷,以防崩刃與破損;此外,陶瓷刀導熱率低,僅為硬質合金的1/2~1/5,熱膨脹系數卻比硬質合金高10~30%,抗熱沖擊性較差。

2020-03-27

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