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How to process the construction wastes? If there is new machinery or new craft to utilize the construction wastes?
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The crushing equipments for rocks and construction waste, and expands the conception of primary and secondary crushing operation.
Adopts the most advanced crushing technology and manufacturing level so that it can efficiently crush the hard and strong abrasion materials.
Impact crusher is most suitable for crushing the materials whose crushing strength lower than 320MP, like mineral, rock and slag, etc.
Cone crusher introduced the Germany technology, is an ideal crusher for large stone crushing factory and mining industry.
To improve and develop equipment sand making rate, own fully core intellectual property rights and multiple national patent.
Besides high quality equipment, the company will provide sincere service such as Engineering Procurement Construction project.
The heat treatment of chromium cast iron is special precautions . Chromium cast iron belong white cast iron, therefore is sensitive to the cooling rate may result in formation of cracks in castings [1-11 Currently, in the literature there is a lot of informa treatment of chromium cast iron, but it appears that they conflict with each other.
2014-02-03 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 ...
Heat Treatment or Nickel-Chromium White Irons. Nickel-chromium white iron castings are given a stress-relief heat treatment because, properly made, they have a martensitic matrix structure, as-cast. Tempering is performed between 205 to 260°C (400 to 450°F) for at least 4 h.
Common Heat Treatment for the Specific Cast-Iron Types. 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, properly made, they have an as-cast
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
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 ...
2011-05-16 by alloying and heat treatment. The vari-ous grades of regular, unalloyed ductile iron are designated by their tensile properties (Table 3). Heat treatment of ductile cast iron includes stress relief and annealing, as well as heat treatments used for steels including normalize and temper (for higher strength and wear-resistance), quench and temper
2013-12-24 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].
2019-08-08 Metallurgical Aspects of HIGH-CHROMIUM WHITE IRONS PROF. DR. ADEL NOFAL ... either while the casting is cooling in the mold or during subsequent heat treatment. i)Chromium. Typical effects of alloying elements on depth of chill. ... chromium white cast iron.
High Chromium White Cast Iron (High Cr White Iron) High Chromium White Cast Iron, or High Cr White Iron, grades are used in wear applications that require some corrosion resistance. The high chromium content offers the corrosion resistance and the
2016-10-27 134 P. Ortega-Cubillos et. al; Revista Facultad de Ingeniería, No. 76, pp. 134-142, 2015 Wear resistance of high chromium white cast iron for coal grinding rolls Desgaste de fundiciones de hierros blancos de alto cromo usados en rodillos de molinos de carbón
ASTM A532 Class III Type A. The 25% Cr alloy is the most common high chrome white iron poured at Penticton Foundry. This alloy has great abrasion resistant properties especially against gouging, grinding and scratching. 25% Cr material can be machined to meet tighter tolerances like those found in pump and piping type castings.
2009-04-01 In high-Cr white cast iron when the Si content is higher than 0.6%, formula (1) can not be used to calculate the t. The silicon element decreases the hardenability of the high-Cr white cast iron. The contents of alloying elements given in Figs. 3 and 4 were the same except for Si (the content of Si was 0.93% in Fig. 4).
Microstructural Characteristics and Mechanical Properties of Heat Treated High-Cr White Cast Iron Alloys Kh. Abdel-Aziz 1a, M. El Shennawy 1b* and Adel A. Omar c 1 Taif University, Engineering College, Mechanical Engineering Department, Taif, Post Code 888, KSA.
2019-03-23 Austempered Ductile Cast Iron. The chemical composition of the cast iron is Fe-3.52C-2.51Si-0.49Mn-0.15Mo-0.31Cu wt%. All samples are etched using 2% nital. Colour micrographs are produced by first etching with 2% nital, followed by open air heat treatment of the metallographic sample at 270 o C for 3 h.
2014-01-30 Journal of Scienti fic Industrial Research Vol. 62, June 2003, pp 583-588 High-chromium (22-34 per cent) Cast Iron Alloys and Their Simulated Behaviour at the Sugar Industry E Zumelzu*, 0 Opitz and C Cabezas Instituto de Materiales y Procesos Termomecanicos.
2019-01-21 Improvement of abrasive wear resistance of the high chromium cast iron ASTM A-532 through thermal treatment cycles tablE I ChemiCal Composition of high Chromium Cast iron Element C Cr Si Mn Mo wt. % 3.02 24.93 0.47 0.74 1.02 According to the obtained values of the main alloying elements (C, Cr), it is assumed that the material meets
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 austenite. The amount of retained austenite changes with the applied heat treatment, which will have an influence on wear properties.
2015-07-15 slurry and the 19Cr iron with a higher chromium content ex-hibitedthebestwearresistance.Lessinformationcanbefound for the wear behaviour of high chromium cast irons in wet conditions with corrosive media. Relative erosion-corrosion wear rate of Fe-(15 to 30)Cr-3C has been reported [14,15] and the as-cast irons with 25-30 wt.%Cr showed promising
The effect of different tempering temperatures on the microstructure and mechanical properties of high boron white cast iron after air quenching was studied. The experimental results indicate that the high boron white cast iron comprises a dendritic matrix and interdendritic boride M 2 B that distributed in the form of continuous ...
2019-10-30 Cast iron's properties are changed by adding various alloying elements, or alloyants. Next 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.
2018-07-07 matrix of as-cast 0.8% Cr heat-resistant cast irons is transformed to ferrite and its cementite is spheroidized in structure. Higher chromium additions of 15% to 35% provide excellent oxidation and growth resistance for temperatures up to 980°C. However, these high -chromium irons have a white -iron structure. Even though they have good ...
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 of melting and ...
2019-07-08 The abrasive wear and corrosion behavior of as-cast, heat-treated and tempered high chromium white cast iron was studied, and the results were evaluated by means of microstructure, hardness, surface roughness and corrosion resistance. The samples were subjected to wear on the ball-on-flat tribometer test machine under different loads.
2014-08-27 a hypereutectic high chromium white iron containing >30wt.% Cr and >4wt.% C was investigated in detail in both as-cast and heat-treated states. The properties related to the service performance of the HCCIs containing niobium, namely the abrasion resistance in wet application and impact toughness were also examined.
White cast iron does not have the easy castability of other cast irons because its solidification temperature is generally higher, and it solidifies with C in its combined form as iron carbide. White cast iron has a high compressive strength and excellent wear resistance, and it retains its hardness for limited periods even up to a red heat.
2013-09-03 MECH 423 Casting, Welding, Heat Treating and NDT Credits: ... High Cr White Cast Iron . Lecture 5 21 ... (heat treatment) ductile iron offers a combination of strength, fatigue properties, and wear resistance that makes it of great interest for heavy engineering and
2017-11-29 white nor gray iron exhibits significant ductility in a standard tensile test. Malleable iron is cast as white iron, then "malleabilized" (i.e., heat treated to impart ductility to an otherwise brittle mate-rial). Besides the four basic types, there are other specific forms of cast iron to which special names have been applied.
ARCHIVES of FOUNDRY ENGINEERING Published quarterly as the organ of the Foundry Commission of the Polish Academy of Sciences ISSN (1897-3310) Volume 9 Issue 1/2009 191-194 41/1 Inoculation of chromium white cast iron D. Kopyci ski* AGH-University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland