Search

With the rapid development of Internet technology, especially the extensive establishment of campus network, the digital learning of a certain course based on information technology is of great significance to the teaching of the new era. Taking the quality course construction of electrodynamics of Shandong Province as an example, we discuss the course website design ideas, experience and techniques, which may have some reference values for the similar main courses of science and engineering.

Using a new kind of sintering technique, i.e. repetitious-hot-pressing technique, Al 2 O 3 /Ti(C 0.3 N 0.7 ) cutting tool material was fabricated successfully. This composite has good mechanical properties (Flexural strength 820 MPa, Fracture toughness 7.4 Mpa m 1/2 , Vickers Hardness 20.4 GPa), especially high fracture toughness compared with other Al 2 O 3 -based ceramics. Comparison of the cutting performance of Al 2 O 3 /Ti(C 0.3 N 0.7 ) inserts with those of other two kinds of commercial cutting tool inserts (Brands: SG-4 and LT55) showed that this cutting tool material is suitable for continuously cutting of cast iron, hardened steel, especially intermittent cutting hardened steel.