iron casting

The development of oil painting in the early history of the condition laid a classical realist oil painting of a tendency. The 15th century European Renaissance, the humanist ideas of religion out of the criticism concerned with the social reality of the positive requirements of the many well-known artist for a single to move away from the classic Christian themes of creation, began life at the time of the figures , Landscape, and direct observation of items described, so that works with religious themes with the stark reality secular factors, and some entirely portray real-life painter of the real. Renaissance painter inherited Greece, Rome, art concepts, focus on work that is not only to describe an event or facts, but also reveals the fact that the events or cause and effect, so pay attention to the idea of forming a typical plot and shape the image of the typical approach of the arts . At the same time, artists also explore the anatomy and perspective in the study of painting in the use of images such as the role of the distribution of light and shade,-Oil Painting-Oil Painting Reproduction-Person Oil Painting-China Oil painting-Art Gallery-Famous Oil painting-Seascape oil paintings forming a model of scientific principles. The use of human anatomy so that the painting of figures has been as accurate as the true proportion of body, the relationship between structure; the focus of perspective drawing so that the establishment of the composition through the formation of an illusion of spatial depth, the paintings of landscape orientation with the reality of the moment The same visual experience; shading to make object picture of unity in a major source of light to issue, from near and far to form a clear hierarchy. The theme of humanism and the pursuit of artistic realism of the concept of modeling in other kinds of painting can not be perfect, because the tool material restrictions, and the material properties of painting tools are suitable for both will be fully reflected. As a result, become a classic oil painting produced by the long-term, highly realistic look.

Ningbo Ruyi Foundry Co.,Ltd. is your reliable source for Ductile iron casting, Grey iron casting and you can also entrust us for Stainless steel casting, Aluminium alloy casting and Refractory steel casting. The moulding process covers Resin Chemically Bonded Sand Cast, Resin Shell Cast, and Green Sand Cast . 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 .Our castings mainly apply to Machine tools industries Pumps industries Gas steam valve industries Automobile industries Air compressor industries Gear cases accessories Electric motor body accessories Other products.

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It is sometimes necessary to machine tension test specimens with a reduced section of 0.357 in. diameter from a casting, since the casting shape does not allow making a larger size specimen. Some casting users have raised the question of the reliability of the smaller specimens. Over a period of years, several size specimens have been taken from the same casting, and it has been found that, if machining is carefully done, the results are reliable. The data in Fig. 6 are representative and have been obtained from a small automotive clutch plate. The hardness and tensile strength data for this casting show that a 5/8-in. plate has a similar cooling rate to a 1.2-in. test bar.

Ductile Iron Casting In trying to predict tensile strength in a casting from Brinell hardness, there are more factors involved than mere sec kness. For sections from which heat flow during cooling is unimpeded, a very good hardness-tensile strength relationship can be established. For more complex castings, such as diesel engine cylinder heads having many cored passages, the cooling pattern may be complicated. The section within the head may freeze fairly rapidly, but, after the eutectic temperature interval is passed, there is a heat build up, and the section may cool more like a simple section two to four times as thick. For such cases, a correlation needs to be worked out for each type of casting.

Green Sand Casting Steel shows a rather minor influence of tensile strength and hardness on the modulus of elasticity, since it is mostly in the range of 29,000,000 to 30,000,000 psi. For gray iron, the modulus of elasticity not only varies with tensile strength but also with the stress level. As a result of these factors, the modulus of elasticity will vary from around 12,000,000 psi for a very soft iron to over 20,000,000 psi for a high strength iron. The stress-strain curve for gray iron in tension is almost a curved line from the origin. This has been reported by many investigators, and Morrogh[14], in reporting some work by Gilbert, suggests that the curve is a result of some volume changes in the spaces occupied by the graphite. They have also shown that some microcracking takes place between flakes. Some investigators have used resonant frequency measurements and also sound velocity measurements which are dependent on modulus of elasticity to predict tensile strength.

Resin Sand Casting In machine tool and other applications where maximum stiffness of a structure is desired, a high modulus of elasticity is desirable. There are other applications, notably those involving thermal fatigue for which a low modulus of elasticity is wanted to minimize the increase in stress levels associated with expansion resulting from temperature increases under operating conditions. High-duty brake drums are an example of this type of situation. It has been found that a rather high-carbon iron (3.60 to 3.92 percent) will give better service than a lower carbon iron. The higher-carbon irons nearly always have a lower modulus of elasticity. Unfortunately. the tensile strength tends to be low with such high-carbon irons. and it becomes necessary to add an alloy to strengthen the matrix.

Alloy Steel Casting engineers often look on percent elongation as obtained from tension test specimens as a measure of the ductility of the material. With this concept. gray iron would not be considered ductile.

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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 Ductile Iron Casting and Grey Iron Casting seam to Iron Casting 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

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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.

Dductile 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

 

EQUIVALENT STANDARDS TECHNICAL SPECIFICATIONS
EN 1563	Germany	France	England	Netherlands	Sweden	USA		Hardness	Tensile Strength	0,2 Proof Stress	Elonga tion	Machinability	Microstructure
	DIN 1693	NF	BS	NEN	MNC	ASTM A536		HB 30	Rm N/mm?/font>	Rp0,2 N/mm?/font>	A5 %
EN-GJS-400- 18-LT	GGG-40.3		-	-	-	60-40-18		120-165	400-450	250-300	27-18	very good	Ferrit
EN-GJS-400-15	GGG-40	FGS 400-12	420/12	GN 42	0717-02	60-40-18		135-185	400-550	250-350	27-15	very good	Ferrit and Perlit
EN-GJS-450-10	-	-	420/12	-	-	65-45-12		160-210	450-600	310-410	20-10	good	Ferrit and Perlit
EN-GJS-500-7	GGG-50	FGS 500-7	500/7	GN 50	0727-02	65-45-12/ 80-55-06		170-220	500-650	320-420	18-7	good	Ferrit and Perlit
EN-GJS-600-3	GGG-60	FGS 600-3	600/3	GN 60	0732-03	80-55-06		200-250	600-750	370-480	8-3	good	Ferrit and Perlit
EN-GJS-700-2	GGG-70	FGS 700-2	700/2	GN 70	0737-01	100-70-03		235-285	700-850	420-600	6-2	moderate	Ferrit and Perlit
EN-GJS-800-2	GGG-80	FGS 800-2	800/2	-	-	120-90-02		270-335	800-1000	480-750	4-2	moderate	Perlit

Pressure die-casting has been and remains one of the most important processing technologies for metallic light-weight components used in automotive construction. The history of aluminium in this industry is entwined with the history of aluminium pressure die-casting itself.

Aluminium pressure die-casts are being used when high requirements are attached to the weight of a certain construction part, the combination of ideal mechanical properties, the corrosion properties, the surface, the machinability and ecological compatibility.

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.Aluminum Die Casting-Die Casting-Aluminum Casting-Investment 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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