Abrasion resistant and high-hardness high chromium cast iron and production process thereof

Abstract

The invention provides a wear-resistant high-hardness high-chromium cast iron and a production process thereof, which relate to the field of metal casting and contain the following components in weight percentage: C 2.52-4.87%, Cr 25.5-35%, Si 1.5-2.5% , Mn 0.2‑0.8%, Mo 0.3‑0.8%, Cu 0.8‑1.5%, Ni 0.25‑0.48%, V 0.13‑0.28%, Al 0.4‑1.2%, Nb 0.28‑0.46%, Bi 0.08‑0.14%, and others For iron and other unavoidable impurities, the high-chromium cast iron can be obtained after the raw materials are melted, deoxidized three times, modified by a Re-Al-Bi-Mg compound modifier, inoculated with a rare earth inoculant, cast, quenched and tempered, The high chromium cast iron produced by the invention has the advantages of good wear resistance, high hardness, macroscopic hardness, high bending strength and impact toughness, and easy processing.

Description

technical field [0001] The invention relates to the field of metal casting, in particular to a wear-resistant high-hardness high-chromium cast iron and a production process thereof. Background technique [0002] High chromium cast iron is the abbreviation of high chromium white wear-resistant cast iron. It has much higher wear resistance than alloy steel, and much higher toughness and strength than ordinary white cast iron. At the same time, it also has good high temperature resistance and corrosion resistance, combined with convenient production and moderate cost. Known as one of the most excellent anti-abrasive wear materials in contemporary times. [0003] As far as the production process of high chromium cast iron is concerned, on the premise of increasing the hardness, reducing the internal stress of the casting as much as possible and increasing the anti-wear performance are undoubtedly very beneficial to prolonging the life of the casting and improving the efficiency...

AI Technical Summary

Problems solved by technology

[0003] As far as the production process of high chromium cast iron is concerned, on the premise of increasing the hardness, reducing the internal stress of the casting as much as possible and increasing the anti-wear performance are undoubtedly very beneficial to prolonging the life of the casting and improving the efficiency of the casting. The research on the production process of chromium cast iron must fully consider the selection of alloy carbides and the smelting process. At present, the domestic smelting industry generally uses 12-20% chromium as the standard to smelt wear-resistant cast iron. Although the production cost is reduced, the castings are in the In the actual use process, there are many problems such as short service life, unstable quality, difficult processing, poor wear resistance, etc.

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