Abstract
Bimetallic cylinders lined with a superior corrosion- and wear-resistant alloy were developed by using powder metallurgy and HIP diffusion bonding technology. The new alloy, whose chemical composition was Ni-17. 5mass%Cr-24. OMo-3. 6B-2. 9Si-1.0Cu (named C703) was obtained by reactive sintering between Ni-Mo-Si-Cu alloy powder and CrB powder during the HIP process. CrB particles were transformed into M3B2 particles during this process. The corrosion resistance to HF and HNO, of C703 was almost the same as that of Hastelloy C. Furthermore. the wear resistance of C703 was about 100 times superior to that of Hastelloy C. C703 was sintered and bonded to the inner surface of a Cr-Mo alloy steel cylinder body using the HIP process. This bimetallic cylinder met with good results for injection molding of fluoroplastic reinforced with glass fiber.
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