heat treatment of high chromium white cast iron

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 adequately made, they have an as-cast martensitic matrix structure. Tempering is performed between 205°C (400°F) and 260°C (450°F) for at least 4 hours.

The austenitiztion heat treatment with temperatures of 980°C and also 1150°C for 1 hour followed by tempering at 260°C for Two hours have been 

In this context, the properties of this alloy, containing 22% chromium and 3% carbon, were investigated after applying different heat treatments and their 

Heat Treatment or Nickel-Chromium White Irons. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h. This tempers the martensite, relieves some of the transformation stresses, and increases the strength and impact toughness by 50 to 80%.

Although high chromium white iron (Cr15Mo3) has an excellent wear-resisting property,the rising price of ferro-molybdenum limits its application. Wang Jingjing[56]has developedCr15Mn5Si3white iron using the way of Mn replacing Mo. The structure and performance ofCr15Mn5Si3has been close to that of Cr15Mo3white iron, while more retained

high chromium cast iron was determined by means of tensile, Keywords: High chromium white cast irons, Carbides, Heat treatment, Residual austenite.

University of São Paulo Abstract Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained

Heat Treatment Tips and Notes for ASTM A532 Austenitization Austenitization must be done to castings made from chrome white iron to ensure a martensitic matrix and provide the highest toughness and abrasion resistance possible. The chemical composition of the casting will determine the correct austenitizing temperature and time.

As high chromium irons are quite brittle, the castings are heated slowly in a cold furnace to 650°C to avoid thermal cracking (as these are bad conductors of 

behaviour of a 15 % chromium white cast iron used for ball mill production. decisive role for the heat-treated high-chromium cast iron properties.

The most commonly used high-chromium white cast iron (HCWCI) is the hypoeutectic white cast iron that contains 2-3.5 wt.% C and 10-30% Cr. This type of material 

ABSTRACT: High-chromium white cast iron contains chromium carbides that provide excellent wear resistance, but also cause poor fracture properties. Heat treatments are applied in an attempt to decrease the angularity of the eutectic carbides and to improve the toughness of the matrix by intentionally creating a high fraction of retained austenite,

Xiao, Effect of heat treatment on microstructure and mechanical properties of a Ti-bearing hypereutectic high chromium white cast iron, Mater. Sci. Eng. A 487 ( 

High-chromium white cast irons are used extensively in the mining, age-hardening heat treatment during which secondary carbide precipitation occurs 

Wear resistance of high Cr white cast irons can be improved by means of heat treatment. This type of cast iron alloy may present a microstructure with retained austenite.

In order to improve the wear resistance and toughness of high chromium white cast iron,Different kinds of heat treatments for the experimental materials are adopted to change the structure of the material.That is change the quantity,the fundamental type of the carbide.Based on the measurement of mechanical prosperities and observation of metallographic microstructrue

Two different heat treatment cycles were used; the first one was applied by austenitizing at 980°C for one hour and tempering at 260°C for 2 hrs. The second cycle was performed by austenitizing at 1150°C for one hour and tempering also at 260 for 2 hrs.

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

The optimal heat treatment process is 2 h quenching treatment at 1000 °C, followed by a subsequent 2 h tempering at 400 °C. The hardness of HCCI 

Hypoeutectic White Iron with 25%Cr after Heat Treatments treatment variables applied to a high-chromium as-cast white iron have on 

The invention discloses a heat-treatment method of high-chromium wear-resistant white cast iron Cr28. According to the invention, high-chromium