Effect of Heat Treatment on Microstructure and Properties ...

Effect of Heat Treatment on Microstructure and Properties of Semi-solid Chromium Cast Iron Nuchthana Poolthong1, Hiroyuki Nomura 2and Mitsuharu Takita 1Division of Materials Technology, School of Energy and Materials, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand 2Department of Materials Processing Engineering, Graduate School of Engineering, Nagoya …

Optimizing hardenability of high chromium white cast iron

In high-Cr white cast iron when the Si content is higher than 0.6%, formula (1) can not be used to calculate the t. The silicon element decreases the hardenability of the high-Cr white cast iron. The contents of alloying elements given in Figs. 3 and 4 were the …

CN102899469B - Heat-treatment method of high-chromium …

The present invention discloses a high-chromium cast iron Cr28 heat treatment method. The present invention is a high-chromium white cast iron Cr28 heated to 1000-1050 ℃, heat insulation 1.5-3h, then cooled to room temperature; and then heated to 710-730 ℃, Tempering Time 1.5-2h, cooled to room temperature; and then a second quenching and tempering twice, i.e., improve the service life to ...

Effect of heat treatment on microstructure and mechanical ...

Dec 15, 2010· The morphology of boride in high boron white cast iron is much like that of carbide in high chromium white cast iron. Download full-size image; Fig. 1. As-cast microstructure of high boron white cast iron: (a) optical microscope micrograph, (b) SEM micrograph and (c) the three-dimensional morphology of the boride after deep etching.

Effects of Heat-Treatment on the Microstructure and Wear ...

The variations of microstructure and mechanical properties of a high-chromium cast iron for rolls were studied from as-cast to the final heat treatments. Results show that the as-cast microstructure of the HCCI consists of M7C3 carbide, M23C6 carbide, martensite matrix, and retained austenite. The large dendritic M7C3 carbide surrounds the matrix, and the M23C6 carbide is mainly distributed in ...

Alloy data sheet high chrome white iron 25% | Penticton ...

Jan 13, 2016· ASTM A532 Class III Type A. The 25% Cr alloy is the most common high chrome white iron poured at Penticton Foundry. This alloy has great abrasion resistant properties especially against gouging, grinding and scratching. 25% Cr material can be machined to meet tighter tolerances like those found in pump and piping type castings.

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

High-chromium (22-34 per cent) Cast Iron Alloys and Their Simulated Behaviour at the Sugar Industry ... treatment for cast iron alloys allow new materials to perform better mechanically and against corrosion when under aggressive industrial environments3.4 . White chrome cast irons are currently leading several fields of applications, being ...

Cast iron - Wikipedia

Cast iron's properties are changed by adding various alloying elements, or alloyants.Next to carbon, silicon is the most important alloyant because it forces carbon out of solution. A low percentage of silicon allows carbon to remain in solution forming iron carbide and the production of white cast iron.

Technical Information No. 11 Abrasion resistant, white ...

noted that the hardness of white grades of cast iron is specified according to the Vickers method. DIN EN 12513 differentiates between 3 classes of white, abrasion resistant cast iron: Unalloyed or low-alloyed, higher-alloy nickel and chromium cast iron and high-alloy chromium cast iron. Since the materials with a high chromium content

Microstructure and properties of high chromium cast irons ...

PDF | 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 ...

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

Heat Treatment or Nickel-Chromium White Irons. 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.

Heat Treatment of Cast Irons - Heat Treat Doctor.com

Heat Treatment of Cast Irons Daniel H. Herring, The HERRING GROUP, Inc., Elmhurst, Ill. Diamond Platinum Rhenium ... Malleable iron is obtained by the heat treatment of white iron so the hard iron ... such as nickel, chromium, and molybdenum

Wear resistance of high chromium white cast iron for coal ...

High chromium white cast iron alloy used in coal grinding components is a material that may present different wear resistance depending on the thermal treatment used in its manufacturing. In this context, the properties of this alloy, containing 22% chromium and 3% carbon, were investigated after applying different heat treatments and their ...

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 appears that they conflict with each other.

Microstructural Modifications of As-Cast High-Chromium ...

The initial as-cast microstructure of a high-chromium (2.35% C, 18.23% Cr) white cast iron consisting of primary austenitic dendrites and a eutectic mixture of M7C3carbides/austenite was extensively...

Heat treatment effect on microstructure, hardness and wear ...

ZHI X H, XING J D, GAO Y M, et al. Effect of heat treatment on microstructure and mechanical properties of a Ti-bearing hypereutectic high chromium white cast iron[J]. Materials Science and Engineering A, 2008, 487: 171–179.

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.

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.

Spalling of High-chromium White Cast Iron Balls Subjected ...

Heat treatments should be adjusted for section thicknesses other than the 75 mm used here. When selecting a high- cr white cast iron, one must choose an appropriate composition and heat treatment to provide a combination of abrasion resistance and spalling life that will best satisfy a particular impact-abrasion wear condition.

Effect of heat treatment on microstructure and mechanical ...

Jul 25, 2008· The effect of heat treatment temperature on the microstructure and mechanical properties of a Fe–4.0C–18.0Cr–1.0Mo–1.0Ti (wt.%) hypereutectic high chromium white cast iron was investigated. The response of the alloy to heat treatment and, therefore, the microstructures developed, differed significantly.

Microstructural Modifications of AsCast High-Chromium ...

The initial as-cast microstructure of a high-chromium (2.35% C, 18.23% Cr) white cast iron consisting of primary austenitic dendrites and a eutectic mixture of M7C3 carbides/austenite was extensively modified by four different heat treatments: H.T.A:

Heat Treatment in High Chromium White Cast Iron Ti Alloy

PDF | 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 ...

HIGH PERFORMANCE MACHINING OF HIGH CHROMIUM ... …

2004). High chromium white cast irons are among the typical wear-resistant materials in which the white cast iron alloyed with 12 – 35 % chromium for achieving superior wear resistance and corrosion resistance (Pearce,1983; Tabrett,1996). The materials offer good corrosion resistance and high abrasion resistance as the

High Chromium Cast Iron: Part One :: Total Materia Article

With carefully controlled heat treatment the cast iron properties can be further influenced to yield higher strength and ductility depending on the desired application. High-chromium white iron is an erosion resistant ferrous alloy widely used in manufacturing, it has for long been applied to components in mining and minerals industry due to ...

Microstructural Characteristics and Mechanical Properties ...

oxidation behavior of high-chromium white cast irons, Materials Characterization, 59, pp. 669-674, 2008. [71] Inthidech, S., Sricharoenchai, P. and Matsubara, Y., Effect of sub-critical heat treat parameters on hardness and retained austenite in Mo-containing high chromium cast iron", International Journal of

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].

US4325758A - Heat treatment for high chromium high carbon ...

A process for softening high carbon, high chromium steel to render it machinable includes pre-heating, homogenizing, isothermally annealing and slow cooling the steel. US4325758A - Heat treatment for high chromium high carbon stainless steel - Google Patents Heat treatment for high chromium high carbon stainless steel Download PDF Info

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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