high chrome cast iron heat treatment

Therefore, it is necessary to improve the situation through heat treatment. High Chrome cast iron requires a combination of a strong matrix and a hard carbide to improve the part's wear resistance. It is necessary to improve Matrix's properties and the shape, size, quantity, and distribution of carbides by heat treatment to give full play ...

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 …

The chromium in high chrome white iron reduces the cooling rate required to produce carbides throughout the material, allowing massive castings to be manufactured with carbides throughout their …

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 …

In the present study, 6 wt% Mo was added into high chromium cast iron (HCCI, 16 wt% Cr), and the effects of heat treatment on microstructure and mechanical properties of the base and alloyed HCCI were investigated. A ledeburite matrix and Mo-rich M 2 C were obtained besides M 7 C 3 in the as-cast alloyed HCCI.

K.M. Ibrahim and M.M. Ibrahim [11] studied the effects of heat treatment on the microstructure and mechanical properties of high chromium white cast iron alloyed with titanium. The austenitization ...

While low-alloyed pearlitic white iron castings develop hardness in the range 350 to 550 HB, the high-alloyed white irons range from 450 to 800 HB. ASTM Specification A 532 covers the composition and hardness of white iron grades used for abrasion-resistant applications. Many castings are ordered according to these specifications: however, a ...

High chromium cast irons (HCCI) have been a material of choice for wear-resistant components in the mining and mineral processing industries for a long time, given their outstanding wear and erosion resistance (Ref 1).The main reason for such resistance can be found in the hard M n C m reinforcement carbides embedded within the metallic …

[7] Karantzalis A. E. L. A. a. M. H. 2009 Microstructural Modification of As-Cast High-Chromium White Iron by Heat Treatment Journal of Materials Engineering and Performance 18 174-181. Google Scholar [8] Lotta Juho S.-P. and Hannula 2015 Microstructural Comparison of Spray-Formed and Conventionally Cast 2.5C-19Cr High …

High chromium cast iron (HCCI) is taken as material of coal water slurry pump impeller, but it is susceptible to produce serious abrasive wear and erosion wear …

High chrome white cast iron with 90 mm diameter ball sample supplied by Çemaş A.Ş from Turkey has been used. ... The heat treatment process involves heating and cooling a metal or alloy to change its mechanical and physical properties, making them more desirable. The samples were processed according to the defined heat treatment …

Topography and roughness profiles of the worn surfaces of the a-b) iron 1 and c-d) iron 4 in the as-cast (a, c) and heat-treated (b, d) conditions after the abrasive wear test with 54 N of load. By comparing the surfaces it is evident that boron additions and destabilization heat treatment improve the wear performance of these irons, since a ...

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 …

The detailed deformation mechanism and its microstructural modifications of white cast iron grinding balls used in comminution have been investigated using transmission electron microscopy (TEM) and XRD. De-shaping is the primary mode of ball consumption, and fracture of balls is a relatively uncommon failure mode. Deshaping is …

The high-chromium cast irons respond to heat treatment when the carbon and chromium contents are appropriately adjusted. However, machining of these alloys is very difficult. Chromium is added to heat-resistance cast irons because it assists in stabilizing carbides and forms a protective oxide on the metal surface.

Heat treatment. 1. Introduction. The objective of this paper is to present a methodology to apply computational thermodynamics techniques to adjust compositions …

High chrome casting is a specialized form of cast iron that contains a high percentage of chromium, typically ranging from 12% to 30%. This alloyed composition provides high chrome casting with unique mechanical and physical properties, making it suitable for demanding applications that require exceptional wear resistance, corrosion …

For example, the hardness (HV 30) of a white cast iron of Fe–3.08C–14.8% Cr (mass%) is 507±15, and the hardness of the cast iron subjected to destabilizing heat treatment at 1100 °C for 2 h following air cooling is only 535±16 [8]. As a consequence, both the avoiding of cracking and markedly improving of the hardness and toughness of ...

Heat Treatment. Article PDF Available. Microstructure and properties of high chromium cast irons: Effect of heat treatments and …

Abstract. The properties of hypoeutectic iron of HCWCI containing 25 wt. %Cr-2.5 wt. %C were investigated after destabilisation heat treatments, cooling (slow and fast cooling) to ambient temperatures, their influence on the structure and hardness was investigated using X-ray diffraction (XRD), element distribution analysis and hardness tests.

Full-annealing results in still lower hardness, when the castings are heated in the range of 950-1010°C, followed by slow cooling to 760°C; soaking at this temperature for 10 to 50 hours, depending on the composition. After machining, the castings may be hardened and tempered. Home ›› Metallurgy ›› Cast Iron. ››.

Hardness of Cr26 high chromium cast iron with different quenching temperature(HRC) Specimen code Quenching temperatures T/℃ Average hardness H/HRC Range of …

Hardness of Cr26 high chromium cast iron with different quenching temperature(HRC) Specimen code Quenching temperatures T/℃ Average hardness H/HRC Range of hardness H/HRC S1 950 59.7 58.9–60.1 S2 980 61.0 60.2–61.5 S3 1000 61.0 60.5–61.8 S4 1020 61.0 60.2–61.7 S5 1050 59.6 58.2–60.9 Table 3. Hardness of Cr26 high chromium …

High Chromium Iron is recommended for applications which involve both corrosion and abrasion. Townley's . HC28 alloy is particularly well suited for slurry pump parts and pipe fittings in coal prep operations and coal fired power stations. HC28's abrasion resistance is comparable to chrome-nickel irons (ASTM A-532 Class

The heat treatment process curve is shown in figure 2. The microstructure of high chromium white cast iron grinding ball as-cast and after heat treatment was observed by metallographic microscope. The sample of …

Their high resistance to wear in these demanding situations stems from the presence of hard eutectic (Cr, Fe)7C3 carbides in their microstructures. In this context, the properties of hypoeutectic iron of HCWCI containing 25 wt. %Cr-2.5 wt. %C were investigated after destabilisation heat treatments, cooling (slow and fast cooling) to …

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 …

Nodular iron, also known as ductile iron or spheroidal graphite iron, is cast iron in which the graphite is present as tiny balls, or spherulites, instead of graphite flakes (as in gray iron), or compacted aggregates (as in malleable iron). The nodular irons typi-cally contain from 3.2-4.1% C, 1.8-2.8% Si and up to 0.80% Mn as major constituents.

Abstract. The properties of hypoeutectic iron of HCWCI containing 25 wt. %Cr-2.5 wt. %C were investigated after destabilisation heat treatments, cooling (slow …

Cast condition. In cast condition, the working layer of the roll from high-chromium cast iron has a typical hypoeutectic cast iron microstructure [].It can be seen …

Keywords: high Cr–Mo white irons; hardness; adhesive wear testing; 3p-bend test; heat treatment; microstructure–properties correlation 1. Introduction Currently, there are a …

The chemical composition and heat treatment of high chromium cast irons can be manipulated to produce different carbide volume fractions as well as radically dissimilar metallic matrices.

Chung et al. [ 5] prepared high carbon (6 wt.%) HHCCI and compared the corrosion wear resistance of hypoeutectic high-chromium cast iron and hypereutectic high-chromium cast iron. The research results show that for hypoeutectic high chromium cast iron, when the slurry flow rate increases from 2.5 m/s to 5 m/s, the corrosion wear …

XRD Investigation on Heat Treatment of High Chrome White Cast Irons. Article. Full-text available ... FeTi-FeB was added to molten high chromium white cast iron in amounts of 0.5–2.5 wt% at 50 ...

The isothermal heat treatment process has been identified as a unique process of fabricating exceptional graphite cast iron due to its remarkable mechanical properties, such as excellent machinability, toughness, and high level of ultimate tensile strength. Austempered ductile iron (ADI), ductile iron (DI), and gray cast iron (GCI), …

2.1 Sample Preparation and Heat Treatment. Hypereutectic high chromium cast iron was smelted in a 15 kg medium frequency induction furnace. Part of high-carbon ferrochromium and scrap steel was first placed at the bottom of the electric furnace, then ferromolybdenum and ferromanganese were added to mix and heat to melt, and the …

The heat treatment process is as shown in Fig. 1. The quenching process is heated in two stages, I. E. 680 °C for 2 hours, then heated to 990,1010,1030,1050 °C for 6 hours, and tempered at 440 °C and 275 °C for 6 hours. This article talks about the Cr26 High chromium cast iron and its heat treatment from microstructures and properties aspects.