Fall 2011 about a valve material**

Regardless of which way is more detailed above, what should be noted in the process of finding is what we need to find. 2011 safety valve manufacturers led us to find valve material innovations and carried out a revolution in valve material changes.

At present, the valves commonly used in the production of various industries in China are metal valves. The use of metal valves has been used for more than a hundred years. Although the structure and materials have been improved during the period, due to the limitations of the metal materials, the metal valves have become increasingly unacceptable. Wear, strong corrosion and other adverse conditions need. Mainly reflected in the short service life, the leakage has seriously affected the stability of the system operation. Traditional metal valves urgently require radical innovations in materials, design, and manufacturing processes. As a new material for the 21st century, advanced ceramic materials have been valued by more and more scientific workers. Applying it to industrial valves is a bold and beneficial innovation.

The deformation of the ceramic material is very small, and it has much higher bonding strength than metal. Under normal circumstances, the crystal ion radius of the constituent ceramic material is small, and the ion price is high and the coordination number is large. These properties determine the tensile strength of the ceramic material. Compressive strength, elastic modulus, hardness, etc. are all very high. However, the "brittleness" and difficult processing of ceramics have limited its application range. In the past decade or so, due to the development and progress of martensitic transformation toughening technology, composite material technology and nano-ceramic concepts, ceramics have made " The "brittleness" has been greatly improved, its toughness and strength have been greatly improved, and the application range has been continuously expanded.

In recent years, new ceramic materials have been actively used in the fields of petroleum, chemical engineering, and machinery. The use of wear resistance and corrosion resistance of ceramics to produce wear-resistant and corrosion-resistant parts instead of metal materials is an important aspect of the high-tech materials market in recent years. One of the directions of development. The following key issues need to be solved in the ceramic application process: to solve the problem of ceramic brittleness, to improve the toughness of ceramics; to control the shrinkage rate, to increase the firing rate of ceramic materials; to develop high-temperature kiln; to develop ceramic processing equipment; to realize ceramic parts and metal valve bodies. Precision fit.

1. High-tech new-type ceramic structural materials are used to make the sealing and wearing parts of the valves, which improves the wear resistance, corrosion resistance and sealing performance of the valve products and greatly prolongs the service life of the valves.

2. The use of ceramic valves can greatly reduce the number of maintenance and replacement of valves, improve the safety and stability of the supporting equipment operating system, reduce the labor intensity of workers, and save equipment repair costs.

3. The use of ceramic valves can improve the tightness of industrial piping systems, while minimizing leakage, and will play a positive role in promoting environmental protection.

4. The raw materials for the manufacture of ceramics are wide and the cost is low. Aluminum, carbon, silicon, etc. can be used to produce ceramic materials with superior performance, which can save a lot of metal materials and rare mineral resources. Valve materials are mainly used in electric power, petroleum, chemical, metallurgy, mining, sewage treatment and other industrial fields, especially in the face of high wear, strong corrosion, high temperature, high pressure and other harsh working conditions, but also show its superior performance. It can meet the high wear, strong corrosion of the use of the environment, especially prominent feature is the long life, its performance and price far better than other similar metal valves. With the continuous development and progress of science and technology, ceramic materials from the formulation, molding, processing and assembly processes and other aspects of technology has become more mature and complete, ceramic valves with its excellent performance more and more people in the industry agree. The use of successful experience in the manufacture of ceramic valves can also be applied to a wider range of engineering fields.