Heat-resistant, wear-resistant and corrosion-resistant plastic parts in heavy vehicles or industrial machinery are called super engineering plastics. Their more powerful performance comes from a completely different manufacturing process. A group of researchers in Japan designed a new method to improve the wear resistance and corrosion resistance of the super engineering plastics of the machine, thereby avoiding environmental corrosion caused during the manufacturing process.
The author of the paper, Kenta Yamanaka, Associate Professor of Deformation Processing, Tohoku University, said: “The global market for super engineering plastics has grown in recent years because they have very high temperature resistance, good mechanical strength, and excellent chemical and high temperature environment resistance. Solvent, but in the manufacturing process, the reciprocating screw in the manufacturing equipment usually suffers frequent wear loss, because the semi-fluid raw material usually contains a large amount of glass fiber as a reinforcing material.”
Super engineering plastics also decompose into sulfide gas, which in addition to physical wear and tear, also leads to a highly corrosive environment. Screws in manufacturing machines cannot withstand this environment for a long time.
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High-speed steel alloy overcomes corrosion
To correct this problem, Yamanaka and the researchers studied a steel alloy called high-speed steel, which is currently mainly used in tools. According to Yamanaka, this steel has excellent mechanical properties at room temperature and high temperature, but it is susceptible to corrosion.
So the researchers used an alloy based on high-speed steel and treated it with copper.
“The wear resistance and corrosion resistance of steel usually have a trade-off relationship,” Yamanaka said. “In this study, we proved that adding a trace amount of copper to high-hardness steel can significantly improve the corrosion resistance of the alloy, thereby achieving the perfect combination of wear resistance and corrosion resistance.”
After analyzing the alloy through imaging and experimental studies, the researchers found that they had successfully developed a highly wear-resistant and corrosion-resistant steel. Next, they plan to further study the properties of the alloy for use in other fields.
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