In recent years, with the transformation and development of China's manufacturing industry to high-end, intelligent and green, there is more and more demand for super-large seamless steel pipes. This requires a thin, large diameter guide ring components to meet the production of large specifications of seamless steel pipes.
Seamless steel pipe is a long strip of steel with a hollow section and no joints around it. Compared with welded steel pipe, it has significant advantages such as withstand high pressure and high strength, and is widely used in construction machinery, oil exploration and other industries, and is an indispensable industrial material. Now the large seamless steel pipe not only reversed the situation of China's long-term dependence on imports of seamless oil pipes, but also seized the international market with technical advantages, and realized the role transformation from followers to leaders.
China Steel Xing machine experts told the China Industry News reporter, the current manufacturing of large seamless steel pipe in the international guide ring general technology is "static casting" guide disc diameter is very large, and belongs to flat parts, the traditional production process for the "static overall casting", the so-called "static casting", the first to build a good type, and then pour hot metal into the cavity.
When it comes to the new technology currently used by China Steel Xing machine, the company's experts introduced that the company currently uses "centrifugal composite casting". That is, the hot metal is poured into the high-speed rotating centrifuge cavity, and the matrix tissue is more dense by centrifugal force. Not long ago, the centrifugal guide ring independently developed by China Steel Xing Machine successfully rolled off the line and replaced the traditional "static casting.
Make "process to achieve green and low-carbon manufacturing.
It is understood that the seamless steel pipe guide disc device is the key equipment on the seamless pipe rolling machine, the guide disc ring is the main core component of the guide disc device, the guide disc ring device in the steel pipe rolling process mainly plays the role of straightening and guiding. Due to the complex condition of steel pipe rolling process, the wear resistance and impact resistance of guide ring materials are very high.
"Of course, this technology can also produce other ring components that can completely replace imports." The expert said.
China Steel Xing machine experts said that after the centrifugal composite casting, high temperature heat treatment quenching, large CNC vertical machining production process, to overcome the flat parts of the centrifugal solidification core spheroidization effect is poor and other technical problems. grain
In the next step, China Steel Xing machine experts said that on the basis of the successful development of guide rings, further explore the development of extra-large diameter flat ring products.