Abstract This guide specifies standard specification for alloy steel castings, which have been subjected to special heat treatment, for valves, flanges, fittings, and other pressure-containing parts intended primarily for high-temperature service...

Heating treatment is a thermorelaxition process by slowly changing the cast iron temperature up and down During this process, heating will cause the metal lattice to vibrate...

Microstructure and wear resistance of high chromium cast iron containing niobium Li Wei Male, born in 1963, PhD, Professor , A suitable heat treatment , Microstructures of high chromium cast irons HCCI with different Nb contents and in different conditions...

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 260 176 C 400 to 450 176 F for at least 4 h...

Optimizing hardenability of high chromium white cast iron SU Ying-long, LI Dan, ZHANG Xue-kun , Hardness testing of heat-treated castings showed that , In high-Cr white cast iron when the Si content is higher than 06 , formula 1 ....

Offsetting Shrinkage in Ductile Iron What Thermal Analysis Shows By David Sparkman May 30, 2001 , Stress relief heat treat increases the , Suck-ins are caused by the combination of a high shrinkage iron, and a thin or weak casting wall that cannot resist the internal...

HEAT TREATMENT OF METALS GENERAL PURPOSE , Ferrous metals include cast iron, steel, and the various steel alloys, The only difference between iron and steel is the carbon , 5- Type of steel chromium 0- Percent of alloy less than l-percent chromium 100- ,...

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 980 176 C and ....

Creep-resistant parts of heat treatment furnaces are in most cases made from high-alloyed chromium-nickel and nickel-chromium iron alloys, both cast and wrought This paper presents the types of casting alloys used for this particular purpose, since the majority of furnace...

Jun 11, 2013 0183 32 Keywords high chromium cast iron, alloying element, heat treatment, hardness, volume fraction of , First of all, the as-cast specimens were annealed for , » More detailed...

When selecting a high- cr white cast iron, one must choose an appropriate composition and heat treatment to provide a combination of abrasion resistance and spalling life that will best satisfy a particular impact-abrasion wear condition...

Heat Resistant Castings-Iron Base Alloys Castings are classified as heat resistant if they are capable of sustained operation while exposed, either continuously or intermittently to operating temperatures that result in metal temperature in excess of...

Effect of Heat Treatment on Microstructure and Mechanical Properties of Ti-alloyed Hypereutectic High Chromium Cast Iron Qiang LIU, 1 Peter HEDSTR 214 M, 1 Hongwei ZHANG, 2 Qiang WANG, 2 Pär G J 214 NSSON 1 and Keiji NAKAJIMA 1...

The article presents results of heat treatment on the high chromium cast iron The study was carrying out on samples cut from the casting made from chromium cast iron...

The heat treatment processes of high chromium cast iron for dredger mud pump blade were studied The results show that when the high chromium cast iron is austenitized at 800 176 C, 900 176 C, 1000 176 C ....

The super-hardened white iron castings of the invention possess an excellent combination of great hardness and toughness, and much better fracture resistance than white iron castings hardened with any form of high temperature heat treating, or a combination of high temperature heat treating and cryogenic treating...

combination of semi-solid processing and heat treatment improves wear resistance and corrosion resistance of chromium cast iron Received July 2, 2003 Accepted January 6, 2004 Keywords semi-solid processing, high chromium cast iron, hardness, abrasion, ,...

Wear and Abrasion Resistant Cast Irons White Irons Click here for the Metallurgy of Cast Iron White cast irons are widely used in abrasive wear applications involved in the crushing, grinding, milling and handling of abrasive materials such as minerals and ores, both dry and as slurri...

Soft Annealing of High Chromium White Cast Iron , P Amorim et al, Soft Annealing of High Chromium White Cast Iron , Materials Science Forum, Vols 455-456, pp 290-294, 2004 , Abstract The influence of plastic deformation and heat-treatment on the precipitation of Al3 Sc, Zr particles and the effect of these precipitates on hardening ....

The heat treatment most frequently applied to gray iron, with the possible exception of stress relieving, is annealing The annealing of gray iron consists of heating the iron to a temperature high enough to soften it and/or to minimize or eliminate massive eutectic carbides, thereby improving its machinability...

The effects of carbon and chromium and of the kind of heat treatment on the structure and properties of high-chromium cast iron HCCI is investigated The methods of x ,...

High Chrome Casting, High Alloy Steel Castings Exporter , So the integrity of the castings and the care and control used in heat treatment are decisive , the formation of the properties of high-chrome white cast iron »More detailed...

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...

The phosphorus content of most high-production gray iron castings is less than 015 percent with the current trend toward more steel in the furnace charge phosphorus contents below 010 percent are common , Chromium is often added to improve hardness and strength of gray iron, and for this purpose the chromium level is raised to 020 to 0 ....

The influence of different heat treatment processes on the microstructure and properties of high chromium cast iron is studied by spheroidizing annealing and different heat treatment process...

treatment, to produce high wear resistance with little or no loss of toughness High amounts combined with chromium gives steel a property known as red hardness...

Heat treatment of cast irons 20 71 Relieving residual stresses aging 20 72 Annealing 20 , Heat Treatment and Properties of Iron and Steel , 4 is important in the heat treatment of certain high alloy steels, particularly of the stainless typ cementite ....

Custom manufacturer of nickel nickel alloy castings including nickel-chromium iron castings Investment casting process is used to fabricate castings Castings are available in weights of 1 oz to 35 lbs Castings feature linear tolerance of plus /- 0010 for the first inch of geometry...

heat treating data book tenth edition e-book published by seco/warwick corporation , table 4 - carbon steel cast or heat chemical limits and ranges 15 table 5 - carbon steel cast or heat chemical limits and ranges 17 , hardenable by thermal treatment 46 table 6 - stainless chromium steels 47 table 7 - wrought stainless steels of special ....

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 980 176 C and 1150 176 C for 1 hour each followed by tempering at 260 176 C for 2 hours have been performed and the effect of these treatments on wear resistance/impact toughness combination is reported...