high chrome white iron heat treatment

Heat Treating ASTM A532 Chrome White Iron Penticton ...

16-01-2018  ASTM A532, or high chrome white iron, has superior abrasion resistance. It is particularly effective in machinery or equipment that experiences grinding, gouging abrasion or crushing. It can significantly reduce downtime and outlasts AR plate and CCO ( by as much as 20 times in the case of CCO) in abrasion

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

Air or furnace cooling, not over 30°C/h, was conducted followed by a tempering/stress-relief heat treatment. Refrigeration heat treatment is the more commonly practiced remedy for low hardness today. High-Chromium White Irons The oldest high-alloy white irons produced commercially were the high-chromium (28% Cr) white irons.

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Metallurgical Aspects of HIGH- CHROMIUM WHITE IRONS

Structure developed by the heat treatment of a high-chromium iron. Specimen from a chute liner 50 mm thick, containing 2.6% total carbon, 1.5% Si, 1.1% Mn, 14.3% Cr, and 3.0% Mo, reheated to 1040 to 1065 C and air cooled. Structure is M7C3eutectic carbides in

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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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Heat Treatment Technology of High Chromium Iron

02-10-2020  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. Heat treatment is almost a necessary process for every high chromium iron casting. Reasonable quenching can make the casting obtain the best ability to resist abrasive wear.

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Heat Treatment of Cast Irons 2018-12-12 Industrial

12-12-2018  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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Heat Treatment of White Cast Irons Metallurgy

Heat Treatment of Cr-Mo and High-Cr White Irons: The main heat treatment is hardening (austenitising, air-quenching) and tempering to induce maximum abrasion-resistance with reasonable fracture-toughness. Annealing, stress relieving are also given.

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Heat Treatment Technology of High Chromium Iron

02-10-2020  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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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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Heat Treating of High-Alloy White Cast Irons[1] Heat ...

High-alloyed white cast irons are an important group of materials whose production must be considered separately from that of ordinary types of cast irons. The metallic matrix supporting the carbide phase in the high-alloy white cast irons can be adjusted by alloy content and heat treatment to develop proper balance between resistance to abrasion and toughness needed to withstand repeated impact.

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Microstructure and properties of high chromium cast

18-07-2013  Abstract. Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide precipitation of different extent and nature.

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Effects of deep cryogenic treatment on property of ...

01-01-2007  There has also been interest in using cryogenic treatments to eliminate the destabilization heat treatment from the processing route for high chromium white irons. It is thought that the secondary carbide precipitation associated with the destabilization heat treatment can adversely affect the fracture toughness of white iron alloys, while the ...

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HIGH PERFORMANCE MACHINING OF HIGH CHROMIUM

indicated that cutting tool materials, levels of C-Si contents and heat-treatment of the work materials have significant influence on the cutting performance. The study also reveals the mechanism of interaction between cBN tool and high chromium white cast iron under the range of machining parameters. Cutting tool materials exhibit

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Heat treatment process for high chromium grinding ball

Heat treatment of high chromium grinding ball is the main method to obtain good wear resistance. The research on high chromium cast iron ball mainly focuses on chemical composition selection, heat treatment process determination, modifier selection, good carbide type and wear mechanism.

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CN104195420A - High-chrome wear-resistant cast iron ...

The invention discloses a high-chrome wear-resistant cast iron material and a heat treatment method. The high-chrome wear-resistant cast iron material is prepared from iron as a main raw material, and carbon, silicon, manganese, sulphur, phosphorus, chrome, molybdenum, nickel and copper as auxiliary materials in manners of melting and casting after preparation.

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High-chromium (22-34 per cent) Cast Iron Alloys and Their ...

the resistance to heat, making operati ons possible at tcmperatures of the order of I, I 00 0c: On the other hand, it is well known that chrome increases hardness and tensil e strength of white and grey irons s. Furthermore, literature shows that high­ chrome alloys exhibit good erosion-corrosive and

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

11-10-2016  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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Heat treatment process for high chromium grinding ball

Heat treatment of high chromium grinding ball is the main method to obtain good wear resistance. The research on high chromium cast iron ball mainly focuses on chemical composition selection, heat treatment process determination, modifier selection, good

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Microstructure and properties of high chromium cast

18-07-2013  Abstract. Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide precipitation of different extent and nature.

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Effects of deep cryogenic treatment on property of ...

01-01-2007  There has also been interest in using cryogenic treatments to eliminate the destabilization heat treatment from the processing route for high chromium white irons. It is thought that the secondary carbide precipitation associated with the destabilization heat treatment can adversely affect the fracture toughness of white iron alloys, while the ...

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High-chromium (22-34 per cent) Cast Iron Alloys and Their ...

the resistance to heat, making operati ons possible at tcmperatures of the order of I, I 00 0c: On the other hand, it is well known that chrome increases hardness and tensil e strength of white and grey irons s. Furthermore, literature shows that high­ chrome alloys exhibit good erosion-corrosive and

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Effects of Heat Treatment Process on Microstructure and ...

High Chromium wear-resistant cast iron is widely used because of its excellent wear resistance. High Chromium cast iron grinding balls are widely used in cement, mining, thermal power generation, etc. To improve the production and heat treatment process of grinding balls and actively explore the relevant laws in the production process has a good guiding role for the actual production.

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HIGH CHROMIUM IRONS - allenfoundry.au

HIGH CHROMIUM IRONS. H.T.W. is a high chromium white cast iron that is used where high corrosion and abrasion resistance are required. It also has excellent growth and scaling resistance under oxidising conditions. A modified H.T.W. can be used where greater corrosion, oxidation and erosion resistance is

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Ni-Hard - Nickel Institute

Heat treatment Finishing the castings Welding Machining Machining Properties 24 ... Ni-Hard Ni-Hard is the generic name for a family of white cast irons alloyed with nickel and chromium to give high hardness and outstanding resistance to abrasion. There are two ... White irons containing higher amounts of austenite can appear quite tough in ...

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Machining and Heat Treating ASTM A-532 - Practical

19-07-2011  Does anyone have any experience working with ASTM A-532 25% high chrome iron? These are cast parts. A-532 Grade III is about Rc42/400 BHN at pour...and can be annealed down to 300 BHN and machined. It can then be heat treated to 600+ BHN. Some pump mfgs, such as Weir-Wemco, use this for grit handling vortex impeller pumps.

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Heat Treatment of Cast Irons - Heat Treat Doctor

form iron is lustrous, silvery, soft, and ductile. However, pure iron is a poor engineering material, generally not as strong as most plastics. Cast irons are based on the Fe-C system, and the solid-state transformations on which cast iron heat treatments are based are similar to those applied to steels. Heat Treatment of Cast Irons

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PROPERTIES, IDENTIFICATION, AND HEAT TREATMENT OF

properties and identification of metal and heat-treating procedures used for metals. For more specific information on metal and heat-treating techniques, refer to TM 43-0106. METAL CLASSIFICATION All metals may be classified as ferrous or nonferrous. A ferrous metal has iron as

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Microstructure and properties of high chromium cast

18-07-2013  Abstract. Different combinations of critical and subcritical heat treatments variously modify the initial as cast microstructure of high chromium white cast irons leading to secondary carbide precipitation of different extent and nature.

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Effect of heat treatment on wear and corrosion behavior

Abstract The abrasive wear and corrosion behavior of as-cast, heat-treated and tempered high chromium white cast iron was studied, and the results were evaluated by means of microstructure, hardness, surface roughness and corrosion resistance. The samples were subjected to wear on the ball-on-flat tribometer test machine under different loads.

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Cast Iron: Properties, Processing and Applications -

A popular grade of white iron is high chrome white irons, ASTM A532. This contains nickel and chromium for good low-impact abrasion applications [4]. Malleable cast iron. Malleable cast irons are formed via a slow annealing heat treatment of white cast iron.

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PROPERTIES, IDENTIFICATION, AND HEAT TREATMENT OF

properties and identification of metal and heat-treating procedures used for metals. For more specific information on metal and heat-treating techniques, refer to TM 43-0106. METAL CLASSIFICATION All metals may be classified as ferrous or nonferrous. A ferrous metal has iron as

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Fundamentals of the Heat Treating of Steel

12 / Practical Heat Treating: Second Edition Fig. 1 Changes in pure iron as it cools from the molten state to room tem-perature. Source: Ref 3 line as far as any changes are concerned, although time is indicated on the horizontal. As pure iron, in this case, cools, it changes from one phase to

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Chemical Composition and Morphology of M7C3 Eutectic ...

phology of M7C3 eutectic carbides in high chromium white cast iron. The presented results are part of the research con-cerning the possibility of improving the properties of chro-mium white cast iron alloying with vanadium, particularly impact toughness, which is

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BASIC HEAT TREATMENT - GlobalSecurity.org

BASIC HEAT TREATMENT ... A metal with a high-heat conductivity heats at a ... reaches a white heat. These colors and the correspond-ing temperatures are listed in table 2-1.

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White Cast Iron – IspatGuru

14-05-2014  White cast iron does not have the easy castability of other cast irons because its solidification temperature is generally higher, and it solidifies with C in its combined form as iron carbide. White cast iron has a high compressive strength and excellent wear resistance, and it retains its hardness for limited periods even up to a red heat.

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White Cast Iron - an overview ScienceDirect Topics

Cast iron material groups include white and grey cast irons (Fig. 13.10A).In the past two decades, the development of new cast iron materials has been seen to offer greater competition to other materials and make cast iron a contender for components not traditionally manufactured from this material [4,5,10,11].In particular, the two cast iron materials with significantly higher strengths ...

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高クロム鋳鉄の諸性質に及ぼすC%、Cr%および熱処理の影響 Influence of C%,Cr% and Heat ...

Influence of C%,Cr% and Heat Treatment on Mechanical Properties of High Chromium White Cast Iron 高田恒夫* 前殿裕章** 桜井市蔵* Tsuneo Takada, Hiroaki Maedono, Ichizou Sakurai 論文・報告 高クロム鋳鉄の諸性質に及ぼすC%、Cr%および熱処理の影響

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