heat treatment of high chromium white cast iron

behaviour of a 15 % chromium white cast iron used for ball mill production. decisive role for the heat-treated high-chromium cast iron properties.

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

High Chromium White Cast Iron, or High Cr White Iron grades are used in wear applications that require some corrosion resistance. One common application using High Chrome White Iron alloys is in Pump and Valve parts for the Mining industry. The high chromium content offers the corrosion resistance and the fine carbides dispersed throughout

The pin-on-disk wear test and solid particle erosion test were used to investigate the wear resistance property of both high chromium white cast iron and multi- 

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.

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, 

ABSTRACT: High-chromium white cast iron contains chromium carbides that provide excellent wear resistance, but also cause poor fracture properties. Heat 

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.

In this context, the properties of this alloy, containing 22% chromium and 3% carbon, were investigated after applying different heat treatments and their 

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

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

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 

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.

High chromium white cast irons must be heat treated to develop the full hardness and maximum wear resistance. The destabilization (hardening) heat treatment is 

As high chromium irons are quite brittle, the castings are heated slowly in a cold furnace to 650°C to avoid thermal cracking (as these are bad conductors of 

Destabilisation (critical heat treatment) of austenite at 970°C for 2·5 h followed by annealing (subcritical heat treatment) at 600°C for 13 h results in massive precipitation of M23C6 carbide

Hypoeutectic White Iron with 25%Cr after Heat Treatments treatment variables applied to a high-chromium as-cast white iron have on 

The hardness, microstructure, abrasive wear resistance and mechanical properties were evaluated for four high-chromium-molybdenum irons in the 

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%.

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

For castings which will be heat treated, the desired mold-cooled structure is often pearlite. This 

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 accomplished, and the effect of these processes on

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.

high chromium cast iron was determined by means of tensile, Keywords: High chromium white cast irons, Carbides, Heat treatment, Residual austenite.

Dec 12,  · 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

Critical (destabilization) heat treatments are conducted at 920-1060 °C, for 1-6 h (Ref 1-10). Subcritical treatments usually follow the 

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

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.

High-chromium white cast irons are ferrous alloys with Cr contents between 12 and 30% and 1.8–3.6% C. The as-cast microstructure is typically composed by a 

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

The most commonly used high-chromium white cast iron (HCWCI) is the hypoeutectic white cast iron that contains 2-3.5 wt.% C and 10-30% Cr. This type of material