قائمة الطعام
High chromium cast irons (HCCI) have been a material of choice for wear-resistant components in the mining and mineral processing industries for a long time, given their outstanding wear and erosion resistance (Ref 1).The main reason for such resistance can be found in the hard M n C m reinforcement carbides embedded within the metallic …
WhatsApp: +86 18221755073
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): …
WhatsApp: +86 18221755073
ZHOU Shaoping, et al: Heat Treatment Effect on Microstructure, Hardness and Wear Resistance of Cr26 White Cast Iron ·142· Table 2. Hardness of Cr26 high chromium cast iron with different quenching temperature(HRC) Specimen code Quenching temperatures T/℃ Average hardness H/HRC Range of hardness H/HRC S1 950 59.7 58.9–60.1
WhatsApp: +86 18221755073
High Chromium White Cast Iron, or High Cr White Iron grades are used in wear applications that require some corrosion resistance. One common application using High Chrome White Iron alloys is in Pump and Valve parts for the Mining industry. The high chromium content offers the corrosion resistance and the fine carbides dispersed …
WhatsApp: +86 18221755073
High-chromium cast iron (HCCI) is widely used for manufacturing mill rolls due to its high wear resistance, hardness, low cost and good adaptability to manufacture [1,2,3,4].Despite the active application of rolls from high-speed steels, HCCI rolls still occupy a large share of the market [].The cast microstructure of the external layer of …
WhatsApp: +86 18221755073
These cast irons have high abrasion-resistance, and can be readily cast in shapes required in machinery used for crushing and grinding, etc. Abrasion-resistance increases with the increase of hardness due to the increase of the volume of the eutectic carbides (alloy eutectic carbides are much harder than iron carbide). The must element …
WhatsApp: +86 18221755073
The high-alloy white cast irons fall into two major groups: Nickel-chromium white irons, which are low-chromium alloys containing 3 to 5% Ni and 1 to 4% Cr, with one alloy modification that contains 7 to 11% Cr, Chromium-molybdenum irons containing 11 to 23% Cr, up to 3% Mo and often additionally alloyed with nickel or copper. A third group …
WhatsApp: +86 18221755073
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 …
WhatsApp: +86 18221755073
The impact toughness of the alloy increased significantly compared with the conventional cast hypereutectic high chromium white iron (containing 4.0 wt.% C and 17.0 wt.% Cr) without titanium and ...
WhatsApp: +86 18221755073
This work analyzes the effect of different additions of silicon (0 to 5.0 pct) on the structure of a high-Chromium white cast iron, with chromium content of 16.8 pct and carbon 2.56 pct. The alloys were analyzed in both as-cast and heat-treated conditions. Casting was undertaken in metallic molds that yielded solidification rates faster than in …
WhatsApp: +86 18221755073
The effect of heat treatment temperature on the microstructure and mechanical properties of a Fe–4.0C–18.0Cr–1.0Mo–1.0Ti (wt.%) hypereutectic high chromium white cast iron was investigated. The response of the alloy to heat treatment and, therefore, the microstructures developed, differed significantly.
WhatsApp: +86 18221755073
Microstructural Investigation on Heat Treatment of Hypoeutectic High Chromium White Cast Irons ... FeTi-FeB was added to molten high chromium white cast iron in amounts of 0.5–2.5 wt% at 50 °C ...
WhatsApp: +86 18221755073
A 18.22 wt.% Cr white iron has been subjected to various destabilization heat treatments. Destabilization at 800 °C caused gradual precipitation of M23C6 secondary carbide particles with time leading to a gradual increase in the bulk hardness. At 900, 1000, and 1100 °C, an initial sharp increase in bulk hardness with time occurred, …
WhatsApp: +86 18221755073
There is a huge demand for high-performance materials in extreme environments involving wear and corrosion. High chromium white cast irons (HCWCIs) display better performance than many materials since they are of sufficient hardness for wear protection and can be tailored in chemical compositions to improve corrosion …
WhatsApp: +86 18221755073
For example, the hardness (HV 30) of a white cast iron of Fe–3.08C–14.8% Cr (mass%) is 507±15, and the hardness of the cast iron subjected to destabilizing heat treatment at 1100 °C for 2 h following air cooling is only 535±16 [8]. As a consequence, both the avoiding of cracking and markedly improving of the hardness …
WhatsApp: +86 18221755073
Soft annealing of high chromium white cast iron. Materials Science Forum, 455–456 (2004), pp. 290-294. View in Scopus Google Scholar [9] R.L. Pattyn. ...
WhatsApp: +86 18221755073
Soft annealing of high chromium white cast iron. Materials Science Forum, 455–456 (2004), pp. 290-294. View in Scopus Google Scholar [9] R.L. Pattyn. ... Behavior of hardness and retained austenite in heat treatment of high chromium cast iron for abrasive wear resistance. Transactions AFS, 112 (2004), pp. 899-910. Google Scholar [13]
WhatsApp: +86 18221755073
The heat treatment of these products consists of a high temperature austenisation followed by quenching and two temperings, required in order to increase their overall hardness and to completely eliminate residual austenite. ... The mechanical behaviour of a low and a high carbon high chromium cast iron was determined by …
WhatsApp: +86 18221755073
The effects of chromium, nickel, manganese, molybdenum and silicon are discussed in relation to recently developed heat treatment procedures by which high-chromium white iron castings can be ...
WhatsApp: +86 18221755073
This article provides a brief discussion on the heat treatment, mechanical properties, and chemical compositions of high-alloy white cast irons such as nickel-chromium white irons and high-chromium white irons.
WhatsApp: +86 18221755073
The influence of heat treatment on microstructure and mechanical properties of high chromium white cast iron alloyed with titanium was investigated.
WhatsApp: +86 18221755073
Heat Treatment in High Chromium White Cast Iron Ti Alloy KhaledM.IbrahimandMervatM.Ibrahim Central Metallurgical R&D Institute (CMRDI), P.O. Box, Helwan, Cairo, Egypt ... Microstructure. e microstructure of as-cast high chromium white cast iron with no Ti-addition consists of M 7 C 3 carbides that form during solidi …
WhatsApp: +86 18221755073
The high chromium white cast iron (HCWCI) has been on the scene for decades, with expectations to remain there due to its exceptional wear resistance. …
WhatsApp: +86 18221755073
1. Introduction. High-chromium white cast irons are ferrous alloys with Cr contents between 12 and 30% and 1.8–3.6% C. The as-cast microstructure is typically composed by a M 7 C 3 carbide network in an austenitic matrix [1, 2].This microstructure provides a good combination of properties such as high hardness, wear resistance and …
WhatsApp: +86 18221755073
The carbide precipitation behavior of 35 wt%Cr–4 wt%C (35Cr–4C) Hypereutectic High Chromium Cast Iron (HHCCI) during heat treatment was investigated by means of scanning electron microscope and transmission electron microscope, and the effect of rare earth magnesium (RE-Mg) modification on the microstructure evolution and …
WhatsApp: +86 18221755073
The wear block was cast by high chromium cast iron, and it is properly heat treatment and surface cleaning before casting, but Into the mold after re-heated to temperature above 600 °C,At the ...
WhatsApp: +86 18221755073
The effect of niobium addition up to 3.4 wt% on the microstructure and mechanical properties of heat-treated high-Cr cast iron containing 13.5 wt% Cr was investigated. Niobium addition caused small hard NbC particles to precipitate within the proeutectic austenite which impede the development of austenite dendrite growth …
WhatsApp: +86 18221755073
Gasan, H. and Erturk, F., Effects of a Destabilization Heat Treatment on the Microstructure and Abrasive Wear Behavior of High-Chromium White Cast Iron Investigated Using Different Characterization Techniques, Metallurgical and Materials Transactions A 44 (11) (2013) 4993 – 5005.
WhatsApp: +86 18221755073
The effect of heat treatment on the microstructure, hardness and wear resistance of modified hypereutectic high chromium cast iron (HCCI) was investigated. The results show that the quenching treatment partially dissolves the edges of the primary carbides, and the sharp corners become rounded and blunt. As the quenching temperature …
WhatsApp: +86 18221755073
The paper is aimed to give an overview on the white cast iron alloys, and particularly high chromium white cast iron alloys, including their classifications, their …
WhatsApp: +86 18221755073حقوق النشر ©2000- 2024 شركة شنغهاي زينيث
