Electric power transmission product series are commonly zincifying microns agaist the fierce outdoor environment.Ductile iron casting and grey iron casting covering Machine tools industries ¡¢ Pumps industries ¡¢ Gas & steam valve industries ¡¢ Automobile industries ¡¢Air compressor industries ¡¢Gear cases & accessories ¡¢ Electric motor body & accessories and so on at the process of Resin Chemically Bonded Sand Cast, Resin Shell Cast, and Green Sand Cast.

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Vanadium has an effect on gray iron similar to molybdenum, but the concentration must be limited to less than 0.15 percent if carbides are to be avoided. Even in such small amounts, vanadium has a beneficial effect on the elevated temperature properties of gray iron.

Steel Casting The beneficial effect of relatively small additions of tin (less than 0.10 percent) on the stability of pearlite in gray iron has been reported by Davis et all. The results of extensive use of tin in automotive engines has been reported by Tache and Cage[12]. Its use is particularly helpful in complex castings wherein some sections cool rather slowly through the Ar3 temperature interval. It has been found that additions of up to 0.05 percent antimony have a similar effect. In larger amounts, these elements tend to reduce the toughness and impact strength of gray iron, and good supervision over their use is necessary.

Aluminum Casting Although most gray irons contain some titanium and the effect of titanium on the mechanical properties has been investigated many times, it is only recently that Sissener and Eriksson[13] have reported the effect of titanium reduced from a titanium containing slag in an electric arc furnace. With titanium contents of 0.15 to 0.20 percent, the graphite flakes tend to occur as Type D graphite rather than predominantly Type A, which is generally considered desirable. They found that for irons with carbon equivalent of less than about 3.9 percent, the addition of titanium tends to lower tensile strength. but, for the higher carbon equivalent irons, tensile strength is improved. Increasing the titanium content of gray iron from about 0.05 to 0.14 percent through the use of a titanium bearing pig iron increased the strength of a hypereutectic iron in an ASTM Specification A 48 test bar A (7/8 in. diameter) from 22,000 to 34,000 psi. Further work is being done with titanium additions.

Stainless Steel Casting Normally. nitrogen is not considered as an alloying element and generally occurs in gray iron as a result of having been in the charge materials. Morrogh[14] has reported that at higher nitrogen levels the graphite flakes become shorter and the strength of the iron is improved. Gray irons usually contain between 20 and 92 ppm (0.002 to 0.008 percent) nitrogen. If the nitrogen approaches or exceeds 100 ppm, unsoundness may be experienced if the titanium content is insufficient to combine with the nitrogen.

The sand used for sand molding is critical and determines the favorable or unfavorable out come of the casting, it controls the tolerances, surface finish and the repeatability while in production. The sand must exhibit the following characteristics:

Characters of sand casting:

FLOWABILITY: The ability to pack tightly around the pattern.

PLASTIC DEFORMATION: Have the ability to deform slightly with out cracking so that the pattern can be withdrawn.

GREEN STRENGTH: Have the ability to support its own weight when stripped from the pattern, and also withstand pressure of molten metal when the mold is cast

PERMEABILITY: This allows the gases and seam to escape from the mold during casing.
All of these requirements are dependent on the amount of active clay present and on the water content of the mixture.

SAND CASTING BENEFITS
Least expensive casting process
Casting can be up to several tons
Less expensive than machining shapes from bar stock
Can cast intricate shapes
Can be used with most pourable metals and alloys

 

From:http://www.ruyicasting.com/sand-casting.htm

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Grey cast iron also known as flake graphite cast iron, is a type of casting iron in which most of the carbon is present as flake graphite .The propertises of grey cast iron depends on the distribution, sizs and amount of graphite flakes, and the matrix structure. These factorys are in turn, influenced mainly by the manufacturing conditions, chemical composition, solidification time and rate of cooling in he mould. Grey cast iron exhibit low to moderate strength, low modulus of elasticity, low notch sensitiviy, high thermal conductivity, moderate resistance of thermal stock , and outstanding castability.

Ductile iron casting as found wide acceptance and competes favourably with steel such that its use in engineering has increased in recent times as while grey cast iron and malleable cast iron has fallen in popularity as other materials such as plastics have found favour.

Ductile iron casting has a clear advantage over malleable iron for applications where low solidification shrinkage is needed or where the section is too thick to permit uniform solidification as white iron

Chemical Compostion Test

Spectrograph

Tensile Test Machine	Metallographic Analysis
Hardness Testing

In March of year 2004, Ningbo Ruyi Casting Co., Ltd. took the ownership of Fenghua Xinxin Casting Co., Ltd. and moved the whole metal melting and pouring production line to the production site of Ruyi forming an updated foundry with excellent technique and integral team.

Technique and capacity:

Ningbo Ruyi Foundry Co., Ltd. is your reliable source for Ductile iron casting, Grey iron casting .The molding process covers Resin Chemically Bonded Sand Cast, Resin Shell Cast, and Green Sand Cast.?We can also offer the advantage brought by our strategic long-term partner with diversified technique( Investment casting for steel, ,carbon steel,stainless steel, pressure die casting and gravity casting for aluminum, alloy, aluminum & zinc , as well as precision machining with general machine tool and CNC machines) so as to make customization easy to carry out . Our integral service concept brought us high praise from our customers from all over the world. Most of our products are exported to Canada, USA, and Europe Spain , Italy, Switzerland, Sweden, and so on etc. and win good reputation among our customers .

Based on the land of size 6000 square meters, the foundry’s monthly iron casting output capacity is up to 350 tons, and 80% of the produced castings are sold to overseas markets.Iron Casting,Ductile Iron Casting,Grey Iron Casting,Steel Casting,Stainless Steel Casting,Carbon Steel Casting,Alloy Steel Casting,Aluminum Casting,Aluminum Pressure Die Casting,Aluminum Gravity Die Casting,Aluminum Sand Casting,Sand Casting,Green Sand Casting,Resin Sand Casting,Mold Shell Casting,Investment Casting,Die Casting,Pattern Service,CNC Machining,Machinery Parts,Auto Accessories,Valve Parts,Electric Power Transmission,Marine Parts,Railway Parts,Electric Motor Parts,Gear Cases,Chair Parts,Air Compressor Parts,Sewing Machine Parts,Construction Parts,Machine Tools Parts,Electric motor body & accessories,Manhole cover parts,Mining accessories,cylinder head & body,Counterweight items,Rotor housing,Flange, Tappet parts,Gear Cases & accessories,Sewing machine parts & accessories,Machine tools industries,Radiator parts,cylinder head & body,Counterweight items,Ductile Iron Casting,Grey Iron Casting

 

Business scope covers:

Machinery Parts ，Automotive accessory，Valve Parts, Electric power transmission，Marine Parts ，Railway parts，Electric motor body & accessories，Gear Cases & accessories，Chair Parts，Air compressor Parts & accessories，Manhole cover parts ，Flange, Tappet parts ，Sewing machine parts & accessories，Construction Parts & accessories，Mining accessories，Gardening Parts & Accessories，Machine tools industries,Radiator parts ,cylinder head & body ,Counterweight items,Rotor housing.

Certificate and Customization:

The foundry conforms to international standards and offers material analysis, heat treatment, non-destructive testing, proof and precision machining. With great efforts and carrying out our policy continuously which is to produce castings to meet your individual requirements, as well as monitoring each stage of production to guarantee high quality, we finally got certified by ISO9001:2000.

The foundry is located in the seaport city of Ningbo, China, it has convenient inland transportation and there are many sea-freight carriers towards different countries in the daily base. We cordially welcome customers from both domestic and overseas! Web Link Directory

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