Liner(Sleeve)
Liner is usually used inside of the barrrel , near to the screw elements. So its inner wall is easily worn and corroded by materials.
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Based on long years of experience for the manufacturing, in order to long last the service life of the liner or barrel liner, we developed our special new materials OS02H , a kind of Nickel-Chromium- Tungsten alloy.
Nickel-Chromium- Tungsten alloy has excellent abrasion resistance and corrosion resistance. The increase of Cr content in the nickel-chromium alloy matrix contributes to the oxidation resistance, high temperature resistance and corrosion resistance of the alloy. At the same time, the addition of CrB is better than WC. The microhardness of CrB is as high as 4000-4200DPH, which is close to diamond. It is more conducive to improving the overall strength of the alloy. Due to the high density of WC, it is about 15.7g/cm3, while the matrix of nickel-chromium alloy is only about 8g/cm3. The melting is caused by the uneven surface and depth of the alloy due to the easy segregation of WC, so the content and particle size of WC must be controlled.
Nickel-Chromium-Tungsten alloy( we call OS 02H) hard phase increased to about 50%, OS02 is only ten to thirty,Moreover, the fusion is not sufficient, and the microscopic pores are relatively obvious, which is reflected by the Rockwell hardness HRC of only 52-55.While the Rockwell hardness of nickel chromium tungsten alloy (OS02H) is HRC56-64, the conventional control is HRC58-60. The service life is 3-5 times longer then WR5 or CPM10V. Nickel-Chromium-Tungsten alloy( OS02H )on the basis of Ni60 in accordance with foreign twin screw working conditions of the formula, greatly improved Hard phase carbides (containing tungsten carbide chromium carbide and other carbides), and the nickel pool fullDissolve. Our Ni-Cr -W alloy layer can reach HRC64 is the best proof.
Three coordinate detectors, dimensional image measuring, instruments, metallographic analyzer, ultrasonic flaw detector. element analyzer and many other basic test machines. Which can fully confirm the quality we offered
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3、Continuously improving and optimizing product apearance ofthe composite layer , which greatly improved the serice fe of products.for the separately inner andBarrel Liner, we changed the Composite layer from thin 8 shape to elipse lat angle shape, which increased the product service life greaty.
