本文介绍了1979年到1983年美国各种工具材料的发展情况: 一.陶瓷和陶瓷合金在超高速领域的地位四年来,在这方面的进展不大,虽有新的产品公布,但基本上仍然为高纯氧化铝以及由氧化铝和15—30％的碳化钛组成的陶瓷合金。对于超高速切削,特別是铸铁的超高速切削,陶 This article describes the development of various tool materials in the United States from 1979 to 1983: 1. The status of ceramics and ceramic alloys in the field of ultra-high speed has not been much progress in this respect in the past four years. Although new products are released, basically, Still a high purity alumina and a ceramic alloy consisting of alumina and 15-30% titanium carbide. For ultra-high-speed cutting, especially the ultra-high speed cutting of cast iron, pottery