heat treatment and high chrome iron

to the action of heat and various corroding media7. Above 16 per cent Cr, an oxide layer type FcO.Cr20, forms on the iron surface, which strongly increases 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

formed in the solid state during heat treatment. The iron is cast as a white iron of a suitable chemical composi-tion to respond to the malleabilizing heat treatment. Alloyed iron—This classification includes gray irons, ductile irons and white irons that have more than 3% alloying elements (nickel, chromium, molybde-num, silicon or copper).

The effect of heat treatment on the microstructure and mechanical properties of Ti-alloyed hypereutectic High Chromium Cast Iron (HCCI) containing Fe–17 mass%Cr–4 mass%C–1.5 mass%Ti was investigated.

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].

HEAT TREATMENT OF METALS GENERAL PURPOSE This chapter contains basic information pertaining to 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

1. Austenite in high-chromium cast irons is stable up to 500°. At higher temperatures the austenite begins to decompose, causing changes in the hardness, wear resistance, and mechanical properties. 2. The resistance of high-chromium cast iron to hydroabrasive wear is minimal in the cast condition and in the annealed condition. 3. To improve the machinability the alloys should …

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.

Download Citation | Effect of the heat treatment mode of high chrome iron rolling mills on chrome redistribution in the stress field | Heat treatment is an important stage in the technology of ...

AI Yunlong, DING Jiayuan, HE Wen, et al. Effects of heat treatment on sliding wear of high chromium white cast iron[J]. Thermal Processing, 2010, 39(3): 46–48. (in Chinese) Google Scholar ZEYTIN H K, YILDIRIM H, BERME B, et al. Effect of boron and heat treatment on mechanical properties of white cast iron for mining application[J].

Destabilisation (critical heat treatment) of austenite at 970°C for 2·5 h followed by annealing (subcritical heat treatment) at 600°C for 13 h results in massive precipitation of M 23 C 6 carbide particles along with spheroidised M 7 C 3. The reversed order of heat treatments leads to extensive precipitation of M 7 C 3 secondary carbide ...

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 ...

Although Ductile Iron and steel are superficially similar metallurgically, the high carbon and silicon levels in Ductile Iron result in important differences in their response to heat treatment. The higher carbon levels in Ductile Iron increase hardenability, permitting heavier sections to be heat treated with

I have manufactured pump castings in high chrome iron containing 2.*% C and 27%Cr as per ASTM A 532 standards. However, I am encountering a low hardness problem. The hardness desired is 550 BHN,but I get 480-500. The heat treatment process is heat to 980C(Stepped heating) soak for 4 hours and then air cool with blowers.

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

Written by LI Ju-cang, ZHAO Ai-min, WANG Li-na (University of Science and Technology Beijing, Beijing 100083, China) Abstract： The effects of heat treatment on the hardness, impact toughness, manufactured process, and …

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

alloying elements(Ni, Cu, Mo, V) on heat treatment behavior of hypoeutectic high chromium cast iron, and established the relationship between the amount of alloying elements and hardness as well as the volume fraction of retained austenite after heat treatment. AI, et al[13], found that the quenching treatment with long soaking time can

Common Heat Treatment for the Specific Cast-Iron Types. High-alloy (e.g., high chromium, high nickel-chromium) white irons can be heat treated. …

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 …

West Salisbury Foundry can produce 15% and 25% Hi-Chrome alloy iron, used in applications of wear resistance and long term heat resistance are required, such as impellers, turbines, and grinding applications. High-chromium alloys attribute their superior hardness to the presence of chromium carbides.

The high controlled percentage of chromium helps to retard the formation of graphite and stabilize the carbides. The article of D. Kopyciński et al. presents results of heat treatment on the high chromium cast iron. The study was …

Microstructure, High-alloy white iron, High-chromium white iron, Nickel-chromium white iron, Cast metal products, Heat treatment, Chemical composition, Fracture toughness, Abrasive wear resistance, Hardness

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. The experimental results show that appropriate heat ...

Download scientific diagram | Schematic of the heat-treatment schedule used for the experimental high chrome white cast iron. from publication: The role of retained austenite on performance of ...

In this study, hypoeutectic high chromium cast iron (HCCI) is deposited on low alloy steel by using electroslag welding. The yielded mixture is furthered introspected by exposing it to range of temperatures (i.e. 440 °C, 480 °C, 520 °C, 560 °C, 600 °C).The respective microstructures are studied after the heat treatment, subsequently.

To verify the effect of heat treatment on wear resistance of hypereutectic high chromium cast iron with different W content, the 6% W sample was selected for heat treatment experiment. After heat treatment at 1050 °C for 120 min, which promote the secondary carbides precipitated. Then, the samples were air-cooled to room temperature, and the ...

The aim of this work was the study of the heat treatment optimisation of high chrome steels used for the manufacture of rolling rolls in order to obtain a final product with a high hardness and wear resistance and taking into account the very large dimensions typical of these products. The effect of modifying the maintenance temperature and time during the different phases of the heat ...

A Mo-free high-Cr cast iron with superior impact-wear resistance was tried to develop for mill balls by alloy design and subsequent heat treatment. The Cr/C ratio was varied up to 7.7 in order to minimize and eventually eliminate Mo addition, still ensuring hardenability. For the proper balance between abrasion resistance and toughness, the combined effects of each heat treatment …