新型超硬合金

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日本住友电气工业公司研制成一种新型的超硬合金。这种合金在常温下,洛氏硬度达到93,弯曲强度达到500公斤/毫米~2。该合金以钨和钴为主要成分,采用粉末冶金法制成。它能根据成分和结晶体大小的不同而呈现出不同的特性。用这种超硬合金制成的微型钻头对印刷电路板钻孔来测定其性能,除在耐磨性和孔位精度上比用原来的材料提高2倍外,耐折断性提高4倍以上。
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