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heat treatment of high chrome white iron

Heat Treating ASTM A532 Chrome White Iron Penticton

Jan 16, 2018· How to Heat Treat ASTM A532 High Chrome White Iron Posted by Penticton Foundry on January 16, 2018. Why Use Chrome White Iron ASTM A532, or high chrome white iron, has superior abrasion resistance. It is particularly effective in

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CN102899469B Heat-treatment method of high-chromium wear

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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Heat Treatment in High Chromium White Cast Iron Ti Alloy

Apr 29, 2014· The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated. The austenitizing temperatures of 980°C and 1150°C for 1 hour each followed by tempering at 260°C for 2 hours have been performed and the effect of these treatments on wear resistance/impact toughness combination is reported.

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Heat treatment process of the high chrome cast iron

Apr 24, 2019· The microstructure of high chromium white cast iron grinding ball as-cast and after heat treatment was observed by metallographic microscope. The sample of 10mm* 10 mm* 8 mm in size at the center of the grinding ball was cut by weld and polished with 200 # to 1500 #

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Heat Treatment Technology of High Chromium Iron Castings

As an anti-wear material, High Chrome White Iron Castings have not only necessary strength and toughness, but also their hardness is the most important quality index. Some high chromium iron castings can obtain the required hardness in the as-cast state, but most of them need heat treatment to meet the hardness requirements.

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Heat Treatment of White Cast Irons Metallurgy

This requires heat treatment involving air-quenching from high temperature, following by tempering at 200°C. High chromium (25% Cr and 28% Cr) white irons have the best combination of excellent abrasion resistance and toughness (to bear the repeated heavy impact loading), because these have hard but discon­tinuous M 7 C 3 eutectic carbides

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Heat Treating of High-Alloy White Irons :: Total Materia

Nickel-chromium white iron castings are given a stress-relief heat treatment because, properly made, they have a martensitic matrix structure, as-cast. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h.

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Analysis of the High Chromium Cast Iron Microstructure

The heat treatment of chromium cast iron is special precautions . Chromium cast iron belong white cast iron, therefore is sensitive to the cooling rate may result in formation of cracks in castings [1-11 Currently, in the literature there is a lot of informa treatment of chromium cast iron, but it

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White Iron (part 1) Industrial Heating

Apr 27, 2011· Problems we face are cracking in a few impeller castings before and after heat treatment, most typically an S-type crack profile diametrically around the hub. Answer: As you most likely already know, optimum properties are usually achieved in high-chromium white irons with heat-treated martensitic structures.

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Metallurgical Aspects of HIGH- CHROMIUM WHITE IRONS

When a martensitic white iron is desired for superior abrasion resistance, additions of 0.5 to 3.0% Mo effectivelysuppress pearlite and other high-temperature transformationproducts. Molybdenum is even more effective when used in combination with copper, chromium, nickel, or both chromiumandnickel. Molybdenum has an advantage over

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Heat treatment process of the high chrome cast iron

The microstructure of high chromium white cast iron grinding ball as-cast and after heat treatment was observed by metallographic microscope. The sample of 10mm* 10 mm* 8 mm in size at the center of the grinding ball was cut by weld and polished with 200 # to 1500 # metallographic sandpaper.

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Research Article Heat Treatment in High Chromium White

e ects of both Ti-additions and heat treatment conditions on microstructure as well as abrasion resistance and impact toughness. 2. Experimental Work e chemical composition of the studied high Cr-Mo white iron is given in Table . Sulphur and phosphorous contents werebelow. %. ealloysweremeltedinamedium frequency induction furnace.

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(PDF) Heat Treatment in High Chromium White Cast Iron Ti Alloy

The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated.

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Heat Treatment Technology of High Chromium Iron Castings

As an anti-wear material, High Chrome White Iron Castings have not only necessary strength and toughness, but also their hardness is the most important quality index. Some high chromium iron castings can obtain the required hardness in the as-cast state, but most of them need heat treatment to meet the hardness requirements.

More

Heat Treatment of White Cast Irons Metallurgy

This requires heat treatment involving air-quenching from high temperature, following by tempering at 200°C. High chromium (25% Cr and 28% Cr) white irons have the best combination of excellent abrasion resistance and toughness (to bear the repeated heavy impact loading), because these have hard but discon­tinuous M 7 C 3 eutectic carbides

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high chrome cast iron heat treatment Ampect

Heat Treatment in High Chromium White Cast Iron Ti Cited by: 6/pics/ Microstructural Modifications of As-Cast High Cited by: 65/pics/ Optimizing hardenability of high chromium white cast iron Cited by: 1/pics/ High Chrome White Iron Abrasion Resistant Cast Irons. Our abrasion resistant cast irons can be supplied in a variety of compositions and

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Heat Treatment of Cast Irons 2018-12-12 Industrial Heating

Dec 12, 2018· Common Heat Treatment for the Specific Cast-Iron Types. 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, properly made, they have an as-cast martensitic matrix structure.

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Effect of Heat Treatment on Microstructure and Mechanical

wear performance of high chromium white cast iron. Quenching, seeding and micro-alloying can, to a limited extent, increase the wear resistance, but this is best achieved by heat treatment in the solid state. The methods for producing high chrome iron casting include double pour, continuous pour and centrifugal castings [1, 3].

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White Iron (part 1) Industrial Heating

Apr 27, 2011· Problems we face are cracking in a few impeller castings before and after heat treatment, most typically an S-type crack profile diametrically around the hub. Answer: As you most likely already know, optimum properties are usually achieved in high-chromium white irons with heat-treated martensitic structures.

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Effect of heat treatment on microstructure and mechanical

Dec 15, 2010· The as-cast microstructures of high boron white cast iron are shown in Fig. 1.It can be seen from Fig. 1 that the high boron white cast iron comprises a dendritic matrix (Fig. 1(a) and (b)) and an interdendritic eutectic compound that distributed in the form of continuous network (Fig. 1(c)). The morphology of boride in high boron white cast iron is much like that of carbide in high chromium

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annealing and re-hardening ASTM A532-93 Class III Type A

My question is, can high chrome cast iron be "heat treated" to re-harden to 500 HB after annealing or even tempering to 400? Some of the curves in the "Abrasion Resistant Cast Iron Handbook" suggest some high chrome irons can end up with vastly different hardnesses even after tempering to the same temperature, depending on retained austenite.

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high chrome cast iron heat treatment Bryan D. Hellmann

Heat Treating of High-Alloy White Irons :: Total Materia Article. The high-alloy white irons are primarily used for abrasion-resistant applications and are readily cast in

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heat treatment and high chrome iron Bryan D. Hellmann

C21D 5 Heat treatment of cast-iron Patents Sitemap Google. 10/08/2014, EP2785882A1 High modulus wear resistant gray cast iron for and low chrome alloy casting ball diversified oil quenching heat treatment process.

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(PDF) Microstructure and properties of high chromium cast

The effects of chromium, nickel, manganese, molybdenum and silicon are discussed in relation to recently developed heat treatment procedures by which high-chromium white iron castings can be

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