Introduction and history of ceramic knife(3)

The history of ceramic tools:

As early as 1912-1913. Aluminium oxide ceramic tools were introduced in the UK and Germany (but the patent for ceramic tools was obtained by the German company Degussa in 1938). Production use began in 1950. Due to their low strength and toughness. For a long time they were restricted to continuous cutting and finishing. Cutting speeds and feeds were low. It was not until 1968 that the second generation of ceramic tools appeared - composite alumina tools. The strength and toughness of these tools has been significantly improved compared to alumina tools. It is possible to cut various workpieces at higher speeds and larger feeds. It has been widely used.

In the late 1970s and early 1980s, the third generation of ceramic tools appeared internationally - silicon nitride ceramic tools. These ceramic tools have higher toughness, impact resistance, high temperature strength and thermal shock resistance than composite alumina tools. The production of ceramic blades is growing rapidly in various industrially developed countries.

China has been mass producing composite alumina blades since the mid-1960s. The current annual production volume is 14-15 million pieces. Although silicon oxide ceramic inserts have been studied since the mid 1970s. Due to poor performance. Can not meet the demand. In recent years. With the continuous research in the field of high temperature structural ceramics. So that the performance of silicon nitride ceramics has been greatly improved. This has led to the rapid development of silicon nitride ceramic tools in China.