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THE ROLE OF RETAINED AUSTENITE ON PERFORMANCE OF GRINDING MEDIA1 Joseph S. Moema2 M. Jones Papo2 Waldo E. Stumpf3 D. Slabbert2 Abstract In this study, high chromebased white cast iron (HCWCI ...
grinding roll from NF6357Ahigh chrome Iron alloy for crushing of solid mineral and grinding operations in a ball mill for cement production. The casting conditions, and the evolved microstructure after heat treatment greatly affect the wear performance of high chromium white cast iron.
High chromium alloy (high chromium white cast iron grinding ball and high chromium steel), as the high chrome ball. At present, most of the domestic wearresistant material enterprises are the intermediate frequency electric furnace. Through reasonable match after melting of high quality scrap steel, chromium alloy material.
The surface of the cast grinding steel ball is not allowed to have the casting defects such as the crack, and the obvious gas porosity, inclusion, shrinking cavity, cold shut, elephant skin, etc. It is not allowed to have the shrinkage cavity, shrinking porosity, gas porosity, inclusion, and other cavity defects on the section including plane pasting through the pouring gate and the ball centre.
The highalloy white cast irons fall into two major groups: Nickelchromium white irons, which are lowchromium alloys containing 3 to 5% Ni and 1 to 4% Cr, with one alloy modification that contains 7 to 11% Cr, Chromiummolybdenum irons containing 11 to 23% Cr, up to 3% Mo and often additionally alloyed with nickel or copper. A third group comprises the 25% or 28% Cr white irons, which may ...
Others argue again that the same phenomenon compromises the performance of the balls through spalling. In this study, high chrome white cast iron (HCWCI) and carbidic austempered nodular iron (CANI) grinding balls were subjected to different heat treatments to yield various amounts of retained austenite, after which they were subjected to ...
WEAR RESISTANT HIGH BORON CAST ALLOY A REVIEW Sude Ma and Jianjun Zhang ... such as high chromium cast iron and Nihard cast iron, which would consume a large amount of expensive alloying elements. In addition, high chromium white cast iron and Nihard cast iron are still a kind of brittle material, this fact restricts their ap
the impact resistance of highchromium white cast iron is greatly affected by heat treatment. Improvement of grinding media has been a slow process. Grinding balls can beevaluated by the user by keeping records of ball consumption and ore tonnage. But this procedure requires long testing times of months or years (Norman, 1948;
white high chrome cast iron grinding balls white high chrome cast iron grinding balls 1. Introduction High chromium white cast irons containing 12 to 30wt . Microstructure and erosion corrosion behaviour of as cast high chromium white irons containing molybdenum in .. bertin and Sinatora [9] tested cast iron balls produced from . carbide ...
Wear characteristics of highchromium white cast iron. High chromium white cast iron alloys have a relatively good wear resistance when compared to other metallic materials, but the level of resistance varies according to the type of matrix microstructure and the volumetric fraction of the primary carbides in the alloy [1416].
offers 3,858 high chromium cast iron products. About 13% of these are casting, 3% are pumps, and 2% are other fabrication services. A wide variety of high chromium cast iron options are available to you, such as ce, sgs.
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.
Nickel Chromium White Iron Grinding Balls YouTube. Jan 3, 2014 ... high chromium white cast iron grinding balls Description : Selection of ... Victor Safe Restoration Part 2: Repairing Broken Cast Iron by Brazing... More details » Get Price
USA US07/461,994 USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords alloy cast iron slugs nickel iron Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
Casting steel ball: characteristics low chromium cast iron balls, medium chromium cast ball, high chromium cast iron grinding ball. Now on the market which ball is best? Now let''s analyze: 1. Forged steel ball: good surface quality, good impact resistance, strong toughness, good wear resistance and it is not easy to be broken and lost round.
Aimed at the work conditions and the failure of the grinding ball in ball grinding, High chromium cast iron with the characteristics of long service life, high abrasion resistance and good shock resistance must be chose in the ball grinding . The best mixture ratio of chemical compositions was pointed out, and the production technological process by using die cast is introduced.
Cast iron''s properties are changed by adding various alloying elements, or 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.
The presence of chromium segregations and nonmetallic inclusions such as sulfides in high chromium cast iron balls could be the possible sites for pit initiation [5]. In order to understand the effect of different levels of chromium addition to cast iron grinding media on general and pitting corrosion, marked ball wear tests, cyclic
irons in the ascast condition as compared to a chilled ductile cast iron by a ballcratering test using SiC slurry and the 19Cr iron with a higher chromium content for the wear behaviour of high chromium cast irons in wet conditions with corrosive media. Relative erosion ...
NICKELCHROMIUM WHITE IRONS The oldest group of highalloy ironsofindustrialimportance,the nickelchromium white irons (NiHard irons), have been produced for more than 50 years and are costeffective materials for crushing and grinding. In these martensitic white irons, nickel is the primary alloying element, because3 to5%Niiseffectivein
Sep 24, 2015· High chrome white iron is composed of Carbides and Martensite (among the hardest phase of iron alloys). ... It can be used anywhere ductile iron is used. It can replace cast steel or even forged steel in some instances. ... Pliant25 High Chrome White Iron. Alloy Data Sheet 25% High Chromium Alloy.
May 14, 2014· High alloy white cast iron. High alloy white cast irons are different than the ordinary types of cast irons since they contain alloying elements. In these cast irons, the alloy content is well above 4 %, and hence they cannot be produced by ladle .
this material. Shapovalova and Bashkin (1985) reported a preheating approach to machine high chromium white cast iron with high speed steel cutting tool (VK6M) under the cutting speed of 1560 m/min and feed rate of mm/rev. They claimed that the productivity was increased by a factor of three to five due to reduced
Jan 16, 2018· Case Study: Read this case study for a specific example of chrome white iron outperforming AR plate. Microstructure Notes 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.
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