Abstract
The high efficiency of the transport of various abrasive materials directly through pipes has dictated its widespread use in the ore-extracting and ore-refining and petroleum-extracting and refining braanches of industry. This paper studies the problem of establishing the basic factors that ensure stable pipe resistance. Experimental specimens of centrifugally cast metallic blanks, were cast, the outer layer of which consisted of steel 30 and the inner of wear-resistant steels 95Kh18 or Kh12Fl. Wear-resistance tests were conducted on an abrasive machine that used quartz sand as the abrasive. The content of residual austenite, martensite, and ferrite in the specimens was determined radiographically. It is shown that the high wear resistance of the steels is governed by the formation of deformation martensite in the abrasive process, and by the presence of fine-disperse carbides and a small amount of residual austenite, which serves as a plastic coupling between the martensite crystals.
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