news image

Ball Mill

Ball mill has been used in many industries for a long time, the technology is quite mature already. But there are still some problems, such as, lots of investors expressed…

news image

MTM Series Trapezium Mill

Raymond mill is ever one classic powder grinding machine in the past. And most of modern mill are from it and MTM series milling machine is the most successful one. It optimized…

news image

LM Vertical Roller Mill

Vertical Roller Mill is our newly-launched product which is applied as a solution to the technical issues such as low output and high energy consumption in the ordinary industry.…

news image

MTW Series Trapezium Mill

MTW Series European Trapezium Grinding Mill (MTW Raymond Mill) is developed on the basis of our experts' long-term R & D experience, structure & performance analyses of traditional…

Heat treatment and properties of iron and steel

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].

Molybdenum grade cast irons

Jan 01, 2007· The microstructure of high chromium cast iron in the as-cast condition is illustrated in Fig. 1. Typically, high chromium iron consists of hard eutectic (Fe, Cr)7C3 carbides embedded in an austenitic matrix. X-ray diffraction of the sample shows that the microstructure of high chromium cast iron consists of austenite, M7C3 and martensite. The ...

Metallurgical Aspects of HIGH

Specification for Hi-Chrome Iron Castings – ASTM A532-82. This specification covers a group of white cast irons that have been alloyed to secure high resistance to abrasion. Castings made of Hi-Chrome Iron, also referred to as Chrome Carbide, are used in the mining, milling, earth-handling, and manufacturing industries.

Heat Treating of High

Jan 16, 2018· No article on heat treating ASTM A532 would be complete without taking a look at its microstructure. The high level of chromium in high chrome white iron prevents the formation of graphite in the microstructure. Instead of graphite, the carbon in …

Heat treatment process of the high chrome cast iron ...

The properties of cast iron also may be modi- fied by the presence of alloying elements—such irons are called alloy cast irons. 2. Properties of Iron Since iron is the basic element of steel, a knowledge of some of its properties is dataa pre- requisite to an understanding of the funda- mental principles underlying the heat treatment of ...

Heat Treatment of High Alloy Graphite Irons | Cast Irons ...

10/08/2014, EP2785882A1 High modulus wear resistant gray cast iron for ... and low chrome alloy casting ball diversified oil quenching heat treatment process. Read more Control of Wear-Resistant Properties in Ti-added Hypereutectic High ...

Heat Treatment Furnace for Grinding Media Balls,Steel Balls

temperingandcoldtreatment.Chemicalcompositions,heattreatments,andsome properties and usesarepresentedforstructural steels,toolsteels,stainless and heat- resistingsteels, precipitation-hardenable stainlesssteels and nickel-maraging steels.

Weldability of Materials

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.

Effect of Heat Treatment on Microstructure and Mechanical ...

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

Effect of heat treatment on wear and corrosion behavior of ...

Jul 18, 2013· (2009). Microstructure and properties of high chromium cast irons: effect of heat treatments and alloying additions. International Journal of Cast Metals Research: Vol. 22, No. 6, pp. 448-456.

(PDF) Microstructural Modifications of AsCast High ...

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. Hardening and Tempering: Depending on the thickness of the casting, there should be sufficient ...

Heat Treatment of Cast Irons

The heat-resistant alloys are listed in Table I along with their chemical compositions and designations. Commercial cast heat-resistant alloys can be identified by designations of the Alloy Casting Institute, now a division of the Steel Founders' Society of America, and the American Society for Testing and Materials.* Some

Microstructure and properties of high chromium cast irons ...

Microstructural Modifications of As-Cast High-Chromium White Iron by Heat Treatment A.E. Karantzalis, A. Lekatou, and H. Mavros (Submitted June 5, 2008) 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 M 7C

annealing and re

matrix of the chill-cast shell becomes martensitic. Special Nickel-Chromium White Iron Alloys Some roll alloys are designed to undergo a modified normalizing heat treatment in order to obtain a bainitic microstructure. Microstructure of indefinite chill rolls

Microstructural Modifications of As

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 980176c and 1150176c for 1 hour each followed by tempering at 260176c for 2 hours have been performed and the effect of these treatments on wear resistanceimpact toughness …

High Chrome Oil Quenching Casting Iron Balls Cr 20

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 …

high chrome cast iron heat treatment

Cast iron is basically steel with a high level of carbon impurities… and carbon doesn't translate into longer boiler life.; Cast iron is a brittle material which can fracture under temperature shock. It's well known that it is common for today's cast iron boilers to have cracked sections, cracked burner doors, leaking gaskets, and leaking tankless coil flange.

HEAT AND CORROSION RESISTANT CASTINGS: THEIR …

However, iron carbide, or cementite, is extremely hard and brittle and these castings are used where high hardness and wear resistance is needed. Malleable irons. These are produced by heat treatment of closely controlled compositions of white irons which are decomposed to give carbon aggregates dispersed in a ferrite or pearlitic matrix.

Steels

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.

Microstructural Modifications of As

temperingandcoldtreatment.Chemicalcompositions,heattreatments,andsome properties and usesarepresentedforstructural steels,toolsteels,stainless and heat- resistingsteels, precipitation-hardenable stainlesssteels and nickel-maraging steels.

Study on the heat treatment process of high chrome cast ...

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.

Heat Treating ASTM A532 | Chrome White Iron | Penticton ...

High silicon and Si-Mo nodular irons are used for manifolds and turbocharger housings for trucks, etc., and for heat treating racks. Heat Treatment: Although high-silicon grey and nodular irons are mainly ferritic (as-cast), but may contain some pearlite and often carbides due to addition of carbide-forming elements, Cr, Mo, which make the ...