NICKEL-CHROMIUM WHITE IRONS The oldest group of high-alloy ironsofindustrialimportance,the nickel-chromium white irons (Ni-Hard irons), have been produced for more than 50 years and are cost-effective materials for crushing and grinding. In these martensitic white irons, nickel is the primary alloying element, because3 to5%Niiseffectivein

High Chrome Ball . High chromium white cast iron grinding ball is also known as high chromium alloy cast ball, high chromium steel ball, simply called high chromium ball. At present, most of the domestic wear-resistant material enterprises are medium frequency electric furnace as the main body, through the reasonable matching of high ...

The main materials that are commercially used for grinding bodies are steel and high-chromium white cast iron. The major commercially used steel for balls is the low alloy high carbon steel. High carbon steels (0.6–1.4% C) are the hardest, strongest, and least ductile among all types of steel.

High-chromium white iron balls with a diameter of 80 mm were cast from 1550 °C by chilled molds. The Fe–2.4C–12Cr (mass%) cast balls were provided by DeXing Casting Co. LTD. of Jiangxi Copper Corporation. They belong to hypoeutectic cast iron.

In China, annual consumption of balls and liners may exceed one million tons. Martensitic high chromium cast iron (Cr of 15%) is a widely used wear resistant material1-1"51, especially for making grinding balls and liners. However, high chromium cast iron is expensive because of high alloy content.

The high-alloy white irons are primarily used for abrasion-resistant applications and are readily cast into the parts needed in machinery for crushing, grinding, and handling of abrasive materials. The chromium content of high-alloy white irons also enhances their corrosion-resistant properties. The large volume fraction of primary and/or ...

Two- and three-body abrasive wear behaviour of different heat-treated boron alloyed high chromium cast iron grinding balls[J]. Journal of Materials Processing Tech.,2000,105(3). DOI: 10.1016/s0924-0136(00)00550-1

In this present work, the grinding balls from high chromium white cast iron (ASTM A-532) were produced by using sand mold-gravity casting. The simulation casting process was conducted before making these grinding balls by using SOLIDCast™ version 8.2.0. The gating system design and the pouring temperature of hot metal were investigated clearly to obtain …

High chromium cast iron ball for cement plant. ShengYe cast iron Ball is produced by metal mold but not sand mold. The metal mold can be faster cooling the smelted metal which makes structure finer and more uniform. The metal mold and the engYe advanced heat treatment technology makes the ShengYe cast iron Grinding Ball with good impact fatigue ...

The invention discloses a high-chromium alloy steel anti-abrasion liner, which is applied to ball mills in the industries of power plants, metallurgy, mines, building materials, and the like. The high-chromium alloy steel anti-abrasion liner comprises the following alloy components in percentage by weight: 2.20-2.50 percent of C, 15-18 percent of Cr, 0.3-0.5 percent of Ni, 1.0 …

High chromium white cast iron grinding balls are also called high chromium alloy casting balls.

High Chromium White cast iron grinding ball is also known as high chromium alloy casting ball, high chromium steel ball, referred to as high chromium ball.

The Casting Process of the High Chromium Cast Iron ... 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 ...Metallurgical Aspects of HIGH- CHROMIUM WHITE IRONS, With small castings such as grinding …

II.Material application. Application of high chromium cast iron grinding ball in ball mill; Ball mill is cement, power, mining and other industries grinding process of the main equipment, ball mill is one of the main vulnerable parts of the ball mill.The grinding ball should have high wear resistance and toughness.Its wear resistance to the production of a very …

phology of M7C3 eutectic carbides in high chromium white cast iron. The presented results are part of the research con-cerning the possibility of improving the properties of chro-mium white cast iron alloying with vanadium, particularly impact toughness, which is used for grinding balls ore, coal, gravel, and cement.

High Chromium White Iron Wear Plates Introduction The lifting effect of the lining plate on the sphere basically depends on the static friction between it and the sphere. The static friction coefficient of wet grinding machine is 0.35, and that of dry process mill is 0.4.

3.1 Matrix structure (1) Carbide and Martensite. The microstructure of the chromium grinding balls are mainly carbide, and the carbide of high hardness in white cast iron is Fe3C, Cr3C, (Fe, CR)3C, Cr7C3, Cr22C6, WC, TiC, etc., therefore, the size, number, distribution, shape of the grinding ball has a direct impact on the performance.

In ball mills, the grinding process involves impact and friction between the grinding balls themselves, the grinding medium, and the mill lining .High-chromium white cast irons are often selected as ball material because of their high abrasion resistance .However, because of the possibility of brittle failure, fracture toughness must also be a consideration in …

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 manifestation of abrasive wear …

Abrading-ball of the present invention is a kind of new high chromium cast iron product, is applicable to building materials, technics of metallurgy mineral dressing, all kinds of ball mill grinding materials of power industry.Use through large, medium and small cement mill proves, do not peel off, indeformable, not broken ball, and ball ...

Grinding balls or crushing mills are elements used in cement industry. They require a high wear resistance under the action of abrasive products in the transformation of rock into fine particles smaller than a millimeter. To satisfy the mechanical and technological requirements, these balls are made of high chromium cast irons (10 to 13% chromium).

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.

(1) After quenching + tempering grinding ball heat treatment, the high chromium cast iron grinding ball obtained martensite matrix structure, in which a large number of massive and rod-like Secondary Carbides were dispersed, the surface hardness of the grinding ball was about 60HRC, the central hardness was about 56HRC The impact …

Tribological tests, under unlubricated environment, are carried out on both types of grinding balls in order to study the wear system. Corrosion tests are also performed on forged steel and high chromium cast iron ball samples. The obtained results reveal a large difference in terms of chemical composition and microstructural components.

A great amount of iron grinding balls in tube mills have been consumed. Under this impact abrasive wear working condition, the failure of wear resistant alloying white irons grinding balls is mainly caused by fatigue spalling. The impact wear resistawe of martensitic high chromium cast iron (Cr of 15%) is not high sometimes, but its cost is not low. Thus, …

Computational thermodynamics was applied to analyze seven high chromium cast iron compositions in order to optimize their hardness and wear resistance after quench and tempering heat treatments. Five of these materials were candidate alloys to be applied in blast furnace wear rings and two were developed for grinding balls.

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 …

Grinding balls of different compositions ranging from mild steel (MS), martensitic stainless steel (MSS), high carbon low alloy (HCLA) steel and high chromium cast iron (HCCI), each of 25.4 mm diameter, were wear tested in a 203-mm diameter porcelain mill (see Table 1) under different conditions.

In recent years, the materials of grinding media used in cement ball mills are as follows: 1. High Chromium Cast Iron. High chromium cast iron is a kind of alloy white cast iron with high chromium content. It has good wear resistance, heat resistance, corrosion resistance and good toughness.

high and low chromium cast grinding balls ball mill . 14 ensp 0183 ensp high and low chromium cast grinding balls ball mill liner hammer Products Made In China China Manufacturer Dear sir I am Zhang Hui from Anhui Fengxing wear resisting material LTD Our company s main products include high and low chromium cast grinding balls ball mill liner …