Introduction of liquid die forging for bucket teeth of excavator

Excavator is a common important construction machinery, which is widely used in many industries of national economic construction, and plays a very important role in production and life. The bucket tooth of excavator is an important part on the machine and also a vulnerable part. At present, there are more than 20000 excavators of different types serving under different working conditions in China, and the consumption of bucket teeth is very large. A large water conservancy project or a medium-sized mine usually has more than 10 excavators in use. The bucket teeth consumed each year amount to millions of tons, and the cost per ton is more than 10000 A lot of them need to be imported from abroad.

Bucket tooth is one of the main wearing parts of mining machinery. It is in direct contact with hard objects in the process of working, and the working conditions are poor. It costs a lot of money to import bucket teeth every year. Therefore, it is of great economic and development significance to develop new materials for teeth and realize the localization of bucket teeth. On the other hand, due to the immature technology of wear-resistant materials and the relatively backward concept, the service life of bucket teeth in China is far behind the advanced level of foreign countries. In recent years, people’s research mainly focuses on the material selection, manufacturing technology and structure of bucket teeth, and has made great achievements, but there are still many problems to be solved.

In order to solve this problem, we should start from the forming technology of bucket teeth and the composition of materials. This will not only reduce costs, but also reduce energy consumption, in response to the country’s green and sustainable development model of low energy consumption.

Liquid die forging is a kind of high energy-efficient green forming technology combining forging and casting. The high-temperature liquid metal that meets the requirements of the material is directly poured into the die cavity of the liquid forging die, and then the hydraulic press is used to exert a certain pressure on the liquid metal to fill the mold under pressure. Finally, the material forming method with excellent performance is obtained Most of the researches are based on casting technology and high manganese steel as material to improve the performance of bucket teeth, but few researches on production mode and forming process are carried out. Therefore, ZHY casting takes excavator bucket teeth as the object and adopts liquid die forging method to study the forming technology of low carbon alloy steel bucket teeth.