AVA Tec. Group is one of the leading companies which established its closed relation with customers not just suppling material, for us providing solution for our customer is our mission.
Steel is the most versatile of the structural engineering materials, so more grades of steel are available for casting than any other type of alloy. The casting of steel presents a number special problems due mainly to the high casting temperature, typically 1550-1600°C, the volume shrinkage that occurs on solidification and the susceptibility of molten steel to oxide formation. Steel castings range in size from a few grams to hundreds of tonnes. Steel castings are often used in critical situations where optimum mechanical properties are essential so that freedom from casting defects is particularly important.
Iron foundries require metal of controlled composition and temperature, supplied at a rate sufficient to match the varying demands of the moulding line. The metallic charge to be melted consists usually of foundry returns, iron scrap, steel scrap and pig iron with alloying additions such as ferrosilicon. The majority of repetition iron castings are made in green sand moulds with resin-bonded cores. The great merits of grey iron are its low cost, its high fluidity at modest temperatures and the fact that it freezes with little volume change. Ductile iron has high ductility allowing castings to be used in critical applications.
The investment casting sector produces a broad range of high value added castings for the aerospace, power, medical and automotive industries amongst others, where quality demands are at their highest.
Foseco offers a growing range of products to help the investment casting sector address they key challenges it faces such as:
Alloy Description
Zircon Based Inoculant (FeSiZr) is a ferrosilicon-based ino-culant containing controlled amounts of the de-oxidizing elements Al, Ca and Zr. The combi-nation of these elements provides a strongernucleating effect than found with simpler inocu-lants. Zircon Based Inoculant (FeSiZr) may be used in bothgrey and ductile irons to enhance the control ofgraphite morphology and reduce chill levels.
Effect in Iron
Zircon Based Inoculant (FeSiZr) is an intermediate perfor-mance inoculant capable of reducing chill inareas of the casting which cool more rapidly. The application of Zircon Based Inoculant (FeSiZr) will refi-ne the graphite shape in thin or heavier sec-tions. Refined and uniform grey iron micro-structures are desirable for optimum enginee-ring properties, and avoidance of randomcoarse graphite flakes will provide an increasein tensile strength. Electric melted irons lowerin sulphur will respond more to the inoculationby Zircon Based Inoculant (FeSiZr).
Zircon Based Inoculant (FeSiZr) is suitable for additionalmodest control of soluble nitrogen in iron andfor ladle pouring conditions where oxidationcannot be avoided. Zircon Based Inoculant (FeSiZr) can beused in ductile irons to promote higher nodulecounts and reduce chill, but high additionsgreater than 0.6% are not recommended dueto the interference of Zr with the nodulizing ef-fect of Mg.
Application
Zircon Based Inoculant (FeSiZr) Inoculant can be sized to suit allinoculation addition techniques. Ladle additionsshould be made as the ladle is between ¼ and¾ full of iron. It is good practice to weigh boththe iron and the inoculant to ensure consistentperformance from treatment to treatment.Smaller sized Zircon Based Inoculant (FeSiZr) may be ad-ded to the downsprue in the mould or preferab-ly to the stream of iron as it enters the pouringbasin. Late additions are advisable to avoid theeffect of nucleation fade when inoculated ironis held for periods longer than eight minutesbefore casting.
Chemical AnalysisMajor elements
Si: 70 – 75 %
Ca: 2.0 – 2.5 %
Zr: 1.3 – 1.8 %
Al: 1.0 – 1.5 %
Fe: Balance
Sizes
Available in various sizes for ladle applicationsas well as in MSI-gradings.
Packing
The product is available in various forms of packing upon request.
Nodulizer is the primary mean of accessing to ductile iron. This article will briefly analyze the classification and nature of the nodulizer.
The classification of the nodulizer
Divided by production of ductile iron castings, nodulizer can be classified as alloy-like nodulizer, massive nodulizer, core line nodulizer, power nodulizer.
1. Alloy-like nodulizer
But the ratio of rare earth divided by Mg in China foundries ranges from 0.5 to 2.2, in foreign this ratio ranges from 0.1 to 0.3.
1.1.1 Calcium alloy
The calcium and magnesium nodulizer is mainly used by Japan casting producers.
The production of Shin-Etsu (SHIN-ETSU), NC5, NCl0, NCl5, NC20, NC25, the content of magnesium changes from 4 to 28%. But there are small changes in calcium content; the range is from 20 to 31%. Chilling tendency of such alloys is small, but it requires a high processing temperature and large amount of residue after treatment.
1.1.2 Nickel magnesium alloy
Nickel magnesium alloys is produced by International Nickel Company. The content of nickel is up to 82 ~ 85% while Ca is 20 % and Mg is 13%-16 %. But nickel is 57 to 61% minimum (which Mg 4 .0 ~ 4.5 %, Ca <2.5 %, Fe 32 ~ 36 %). German chemical company produces nickel-metal magnesium alloy in which Ni 47 ~ 51 %, Mg l5 ~ 17 %, C1.0 % Si28 ~ 32 %, RE1.0 %. The advantage of these alloys is heavy, reaction steady and nickel alloy can play a role in alloying. But it is characterized by expensive, this alloy in China, basically is not applied in China foundries.
1.1 Nickel-silicon alloy
Nickel-silicon alloy is currently not applied in China basically.
1.2 Pure magnesium alloy
Pure magnesium alloy processing need a dedicated pressure make magnesium package, and the magnesium absorption rate is high. But it needs very strict security dealing measures leading to a smaller proportion of the production application.
1.3 Rare earth
Rare earth is used when iron foundry invented ductile iron, which promotes the process of ductile iron industrial applications greatly.
But the price is high, and it has a large chilling tendency. If the mount is over, it will make graphite metamorphosis .So now it is no used alone as nodulizer, only as an auxiliary elements.
2. Massive nodulizer
Press magnesium and iron and silicon content designed directly into compression molding. Silicon in this nodulizer is very low. So it is referred to as a low pressure block nodulizer, which provides subsequent room and conducive to production of cast iron. But this alloy is easy to float, the effect of treatment is volatile. So it is better to use with massive nodulizer
3. Core line nodulizer
Coat the magnesium powder, iron powder in a thin steel plate or steel plate and cast it into the molten iron to achieve the purpose of balling. But this nodulizer is expensive, the investment in equipment is large and the absorption rate of alloy is high, so the cost of processing ductile iron is almost no increase.
4. Power nodulizer
Power nodulizer is a Russian patent. Mix with the magnesium powder and inhibitors into the bag. Make the molten iron flow through the surface of alloy, reacting with alloy layer and layer. Iron foundries call this special process MC.
Each nodulizer has its own advantages and disadvantages, iron foundries should base on their products and production process to choose appropriate nodulizer, in order to decrease the cost of investment and increase the production efficiency.
Name of the wax : Filled pattern wax
Grade no : FPWE.30
Colour : Green
Discription : FPWE.30 is a Filled Pattern Wax, having 30% filler content. This wax is suitable for manual as well as automatic production system. This wax is formulated for small to big wax pattern production. This property makes it special for wax pattern production of Automobile Components, Valve and Impeller Components, General Engineering and others.
Filler Content: 30%
R&B Softening Point: 65⁰C to 68⁰C
Needle Penetration: 5 to 10 DMN at 25°C, 100gr, 5sec
Congeling Point: 70⁰C to 82⁰C
SR NO. |
DETAILS |
SPECIFICATIONS |
OBSERVATIONS |
1 |
Colour |
Green |
Green |
2 |
Form of Supply |
Pellets |
Pellets |
3 |
Moisture Content |
Nil |
Nil |
4 |
Ash Percentage |
0.03 max |
0.022 |
5 |
Paste Injection Temperature |
58-60⁰C |
58⁰C |
6 |
Packing |
25 kg HDP Bag |
This is a glue type wax. While tree/assembly making, wax patters gate should be dipped in the molten Sticky Wax and then soldered to the wax runner. This Sticky Wax provides a very strong joint. It reduces the assembly time and make the process hassle free.
Physical Properties
1 |
Color |
Pale yellow |
2 |
Form of supply |
Small chunks of 100 gm |
3 |
Ash content |
0.02 Max |
4 |
Melting point |
75°C |
5 |
Moisture content |
NIL |
6 |
Packing |
25 kg box of 250 small chunks |
Stickcast is a sticky wax designed for soldering the wax patterns to wax runner system. Its melting point and strength is designed for mass production of wax pattern assemblies.
It also minimizes the part broken problems while shell building.
Optimum Operating Parameters
1 |
Optimum operating Parameters |
60º to 65ºC |
Calcined Petroleum Coke
F.C. : 98.5% Min.
S : 0.5% Max.
Ash : 0.5% Max.
Moisture : 0.5% Max
L.O.I. : 0.5% Max.
Size : 1-5 mm 90% Min.
Graphite Petroleum Coke
F.C. : 98.5% Min.
S : 0.05% Max.
Ash : 0.5% Max.
Moisture : 0.5% Max
L.O.I. : 0.5% Max.
Size : 1-5 mm 90% Min.
ITEM |
High-Carbon Steel Shot |
Common low-Carbon Steel Shot |
TAA LCB mixed abrasive |
Note |
|
Chemical Compostion |
C |
0.85% - 1.20% |
0.08% - 0.20% |
0.10% - 0.20% |
Sulphur and phosphorus are the harmful elements, should be reduced in order to decrease the friability and increase the fatigue life |
Si |
0.40% - 1.20% |
0.10% - 2.00% |
0.10% - 0.35% |
||
Mn |
0.60% - 1.20% |
0.35% - 1.50% |
0.35% - 1.50% |
||
S |
≤0.05% |
≤0.05% |
≤0.05% |
||
P |
≤0.05% |
≤0.05% |
≤0.05% |
||
Other alloy elements |
|
|
Adding Cr, Mo, Ni, B, Al, Cu etc alloy element |
Adding alloy elements male it have the excellent property of alloy steel |
|
Hardness |
HRC40-56 |
HRC32-38 |
HRC42-48 / HRC48-54 |
The proper Microstructure insture the shotblast effciency |
|
Microstructure |
Tempered martensite |
Martensite Structure |
Duplex structure combined martensite and bainite |
Duplex structure can ensure high tenacity and high strength |
Sogemi Engineering Srl has a long history of innovations and success in the field of foundry equipment for the No Bake process.
Since its beginning in 1968, Sogemi has focused its work on the customer's needs and has developed a continuous innovation with its equipment, both in terms of higher productivity and in terms of eco-friendly impact in the foundry process.
At the beginning of the '80 'S Sogemi developed the technology of Rotary furnace with oxy-combustion to melt cast iron. Nowadays it has become one of the leading technologies to melt Iron in an efficient and non polluted way.
Today Sogemi is a worldwide supplier that operates in more than 30 countries, contributing, with its equipments, and reliable services, to the success of the most important foundries in all over the world.
By having the exclusive representation of prestigious international companies, AVATec. Group supplies required raw material of different industries at the most competitive price and best quality both directly from the origin country and through its domestic warehouses. Its stable inventory of a wide range of materials is a reliable source for many producers.
Also with the support of experienced staff and foreign specialists, AVATec. Group has the opportunity of implementing joint R&D projects with the clients.
AVATec. Group hopes to establish a deep and lasting relationship with the customers in removing barriers to the country’s industries and promoting local industrial products.
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