heat treatment of high chromium white cast iron
heat treatment of high chromium white cast iron
heat treatment of high chromium white cast iron
Jul 29, · Soft annealing of high chromium white cast iron. Materials Science Forum, 455–456 (2004), pp. 290-294. View Record in Scopus Google Scholar. R.L. Pattyn. Behavior of hardness and retained austenite in heat treatment of high chromium cast iron for abrasive wear resistance. Transactions AFS, 112 (2004), pp. 899-910. View Record in Scopus
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Abstract: High-Chromium White Cast Iron is a material highly used in mining and drilling shafts for oil extraction, due to its high wear resistance. However,
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cooperate to specify the composition, heat treatment, and foundry practice The high-alloy white cast irons fall into three major groups:.
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The austenitiztion heat treatment with temperatures of 980°C and also 1150°C for 1 hour followed by tempering at 260°C for Two hours have been
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1. Austenite in high-chromium cast irons is stable up to 500°. At higher temperatures the austenite begins to decompose, causing changes in the hardness, wear resistance, and mechanical properties. 2. The resistance of high-chromium cast iron to hydroabrasive wear is minimal in the cast condition and in the annealed condition. 3. To improve the machinability
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Xiao, Effect of heat treatment on microstructure and mechanical properties of a Ti-bearing hypereutectic high chromium white cast iron, Mater. Sci. Eng. A 487 (
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In order to improve the wear resistance and toughness of high chromium white cast iron,Different kinds of heat treatments for the experimental materials are adopted to change the structure of the material.That is change the quantity,the fundamental type of the carbide.Based on the measurement of mechanical prosperities and observation of metallographic microstructrue on the different samples
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the high temperature strength and high temperature hardness of high chromium cast iron are high, especially in the atmosphere containing chemical components such as so2 oxidation resistance is very good.therefore, it is widely used in heat resisting parts of blast furnace, coke oven, sintering furnace and other industrial furnaces.especially at
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Overheating of the melt temperature was increased 50 °C more than the casting temperature for heat absorption of AISI4140 steel (ductile part). Before casting, the ladle, mould cavity and ductile part were well pre-heated up to 600-700 °C by a burner in order to decrease the temperature losses.
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ABSTRACT: High-chromium white cast iron contains chromium carbides that provide excellent wear resistance, but also cause poor fracture properties. Heat treatments are applied in an attempt to decrease the angularity of the eutectic carbides and to improve the toughness of the matrix by intentionally creating a high fraction of retained austenite,
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the nickel-chromium martensitic white irons, containing up to about 7% ni and 11% cr, usually put into service after only a low-temperature heat treatment at 230 to 290c to temper the martensite and to increase toughness. if retained austenite is present and the iron therefore has less than optimum hardness, a subzero treatment down to liquid
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Heat Treatment or Nickel-Chromium White Irons. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h. This tempers the martensite, relieves some of the transformation stresses, and increases the strength and impact toughness by 50 to 80%.
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High-chromium white cast irons are used extensively in the mining, age-hardening heat treatment during which secondary carbide precipitation occurs
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data of the parameters of heat treatment of high chromium cast iron, properties of the carbide phase of white cast iron, are well-known.
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behaviour of a 15 % chromium white cast iron used for ball mill production. decisive role for the heat-treated high-chromium cast iron properties.
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University of São Paulo Abstract Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained
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High-alloy (e.g., high chromium, high nickel-chromium) white irons can be heat treated. For example, nickel-chromium white-iron castings are given a stress-relief heat treatment because adequately made, they have an as-cast martensitic matrix structure. Tempering is performed between 205°C (400°F) and 260°C (450°F) for at least 4 hours.
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High chromium white cast irons (HCWCI) are widely used as abrasion resistant materials in cement manufacturing, mineral processing and slurry pumping
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Process/ Alloy has been developed for the production of high chrome high carbon cast iron with improved wear resistance. Heat Treatment has been optimized to get better wear resistance. Oil temperature and viscosity of the oil have been optimized to have a faster quenching rate and also to achieve distortion-free grinding media.
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In this context, the properties of this alloy, containing 22% chromium and 3% carbon, were investigated after applying different heat treatments and their
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The heat treatment process of high chromium cast iron grinding ball includes wind quenching, oil quenching, and special quenching solution treatment. After repeated test and mining, the oil quenching can fully meet all its technical specifications The consumption of iron ore is twice that of iron ore.
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secondary carbides which are formed during solidification and precipitated during heat treatments of high chromium irons. Keywords – High chromium cast iron
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Chapter 1 High Chromium Cast Irons cryogenic treatment of sg iron for disc brake application, white cast iron 10 hardness 375 to 600 bhn tensile, microstructure evaluation and wear resistant properties of, alloying additions of molybdenum and or nickel up to 1 5 white cast iron 11, resistant high chromium cast iron the results on ti alloyed
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The invention discloses a heat-treatment method of high-chromium wear-resistant white cast iron Cr28. According to the invention, high-chromium
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high chromium white cast iron, crusher, heat treatment, wear rate. Abstract. Crusher is a component of heavy equipment used to.
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The treatment consists of heating the castings to 480-540°C for 8-12 hours, but the temperature and the time at the temperature have important bearings on properties. Excess time or temperature may soften the castings with drastic reduction in the abrasion resistance; whereas, insufficient temperature does not eliminate the austenite completely.
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Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained austenite.
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Alloy steels types, properties and uses. Cast Iron: Grey, white, ductile and malleable cast iron. in the range of 0.3% to 0.7% Are popularly known as machinery steels Are easily hardened by heat treatment. High carbon steels Have carbon contents between 0.7 and 1.4 wt%, are the hardest, strongest, and yet least ductile of the carbon steels
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High chromium white cast irons must be heat treated to develop the full hardness and maximum wear resistance. The destabilization (hardening) heat treatment is
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The invention discloses a heat-treatment method of high-chromium wear-resistant white cast iron Cr28. According to the invention, high-chromium wear-resistant white cast iron Cr28 is heated to 1000-1050 DEG C; the white cast iron Cr28 is heated and the temperature is maintained for 1.5-3h; the white cast iron Cr28 is air-cooled to room temperature; the white cast iron Cr28 is heated to 710-730
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The invention discloses a heat-treatment method of high-chromium wear-resistant white cast iron Cr28. According to the invention, high-chromium wear-resistant white cast iron Cr28 is
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