High manganese steel, first proposed in 1882 after water toughening treatment, high impact loads and high compressive stress due to deformation twinning and other organizational changes induced into the surface hardening, micro-hardness up to HV750, while the core remains maintain a good impact toughness. Jaw tooth plate, Park moving cone of the cone, fixed cone, hammer hammer, etc., known as the first generation of wear-resistant materials. It is not suited to low-impact loads or low stress. Shanghai World states in line with the two aspects of product technology and quality materials, production equipment gradually updated. In order to imported equipment accessories based on the domestic machine, anti-wear pieces, we conducted a repeated trial. Developed by a production run test with accessories life of anti-wear alloy production and imported products are fairly, can replace imported parts.
With the crushing of the machinery industry, more and more problems one after another out, such as broken areas of expansion as well as equipment requirements of the durability of a higher demand, the industry continues to develop wear-resistant materials. Hard nickel cast iron in 1930, up to hardness of HRC55-60, as the second generation of wear-resistant materials, too brittle, it can only make small parts, such as sand and gravel washing machine, spiral blade plate, and of nickel in your , it is used very little. Called third generation of wear resistant material than the hard nickel cast iron a few years later, Gau, cast iron is tough martensitic matrix, the distribution of the hard chunks of carbide and a certain amount of diffuse small secondary carbide objects, when the chromium content of more than 10%, the carbide (Fe and Cr) 7C3 type. Its hardness is up to HV1300-1800. Is mainly used in counterattack board hammer blow plate and the vertical shaft. The high chromium cast iron chromium content is divided into Cr15, Cr20, Cr26 three kinds of low chromium content of low prices and high levels of toughness is relatively good, the counter-plate hammer, most domestic manufacturers Cr20 manufacturing abroad more widespread use of Cr26. The Shanghai sebang learn from foreign advanced technology, in some high-end equipment (the VAI new sand making machine, hydraulic cone crusher, the JCE Jaw Crusher, etc.) the manufacture, selection and import of high wear-resistant materials, with alloy content. high mobility, large shrinkage, and poor thermal conductivity characteristics and therefore in the design of its cast molding process, to take the principle of solidification, and to enhance the feeding effect of the riser to the casting, the impact hammer, counter board, etc. Heavy casting stand pouring rain riser casting method.
The inadequacies of the high chromium cast iron is hard and brittle and high prices. New wear-resistant materials in the ongoing. It is understood that: martensitic cast steel of high toughness, multiple low-alloy air-cooled martensite – bainite cast steel, high strength and toughness austenite – bainite steel is expected to become the next generation of wear-resistant materials, these new Once the mature material and has been applied, will drive the crusher especially for the development of wear-resistant materials strong dependence of the crusher and impact crusher.
