Are there any gray iron casting professionals! Please advise!

Add silicon, manganese, chromium, nickel, molybdenum.

Nitrogen can be added if necessary.

The last one is used with care.

If it is convenient to analyze the components.

Mind having a professional personnel know.

I have been in the stainless steel casting industry for 8 years. Gray iron has not been deeply touched.

Only so much can be offered.

As for the relevant formula, it is not easy to provide.

The composition range of cast iron commonly used in industry: ,, In addition, it also contains CR, MO, V, CU, AL and other elements.

The microstructure of gray iron is characterized by graphite with flakes, and its matrix structure is divided into three types: ferrite, pearlite, ferrite + pearlite.

In general, C and Si are effective elements for graphitization. In order to ensure that the cast iron can get gray mouth in casting, and not to get too many and coarse graphite flakes, the composition of cast iron is usually controlled at and 1.

Elements such as Al, Cu, Ni, and Co in cast iron will also promote graphitization. Carbide-forming elements such as S, MN, CR, W, MO, and V prevent graphitization. S not only strongly resists graphitization, but also reduces the mechanical properties and fluidity of cast iron.

Generally, it is controlled as follows. Although MN can prevent graphitization, it can be associated with S to generate MNS, its content.

Gray iron can be seen as an inclusion of the steel matrix with flake graphite. Therefore, the fewer, finer and more uniform graphite flakes, the higher the mechanical properties of cast iron. The content of graphite flakes in cast iron is related to the C and Si content, especially C.

However, low C and Si content will increase the tendency of cast iron to white, forming white mouth or numb mouth tissue.

Usually, in order to improve the mechanical properties of cast iron, "inoculation treatment" can be adopted, that is, a small amount of "inoculant" is added to the molten iron before casting. In this way, a large number of artificial crystal nuclei are produced during the solidification process of cast iron to promote the nucleation and crystallization of graphite. Not only can it prevent white mouths, but it can also significantly refine the crystallization of graphite sheets.

The most commonly used inoculants are ferrosilicon and calcium silicon-calcium alloys, and the amount added is generally about the total weight of molten iron. After incubation treatment, the cast iron not only has a great increase in strength, but also has improved shaping and toughness.

I'm in design, and I only know so much about cast iron, and I hope it can help you.

Gray iron according to tensile strength grade: HT (the letter is the pinyin of gray iron, 150 is the tensile strength of 150 megapascals). Gray iron has almost no toughness (when doing standard test rod stretching, there is no elongation), ductile iron can, similar to steel, grades: qt -2 and so on.

In order to improve the strength of gray iron, it is necessary to pay attention to controlling the carbon and silicon content (adding scrap steel to reduce the wrought iron) not to be high, and at the same time adding alloys such as manganese and copper. The theory is not written. Junxin Hardware Machinery.

Gray iron. It is a heat transfer coefficient similar to that of a sand mold or a sand mold.

The casting mold is cast, and the fracture has gray particles, so it is called gray cast iron. Grey cast iron has good casting properties, machinability, high wear resistance, vibration damping and low notch sensitivity. Due to the high carbon content, rough structure, tensile strength.

It is not high, but it has good brittleness, but excellent compressive performance. The grade of gray iron is indicated by HT plus tensile strength grade. There are 6 grades of gray iron casting:.

It has a certain tensile strength. It has good wear resistance, vibration resistance and easy processing, and can maintain high accuracy after aging or heat treatment. It is mostly used for mechanical parts, such as machine tool bases, cast iron platform plates, hydraulic pistons, plastic section material crushing mechanism, belt pulleys, etc.

Hefei Quansheng Machinery Iron Casting Process includes lost foam, sand mold and precision casting. Follow the drawings provided by the customer. At the same time, Kwon Seong has 16 years of experience and technology in casting.

Therefore, it brings a different experience from other manufacturers to a wide range of customer groups. With a professional after-sales team, regular return visits every month to check the defects of the castings, and make improvements after returning to the factory. Only in this way can customers rest assured that Quansheng is prosperous.

If you have any questions, please feel free to check out the cooperation. (Look).

Gray cast iron refers to cast iron with medium ink in flake stone, and is called gray cast iron because the fracture is dark gray when fractured. The main components are iron, carbon, silicon, manganese, sulfur and phosphorus, which is the most widely used cast iron, and its output accounts for more than 80% of the total cast iron output. According to the morphology of graphite, gray cast iron can be divided into:

Plain gray cast iron, graphite in flakes; ductile iron, graphite is spherical; Malleable cast iron, graphite in clump flocculent; Graphite cast iron, graphite is worm-like.

Gray Cast Iron: Gray cast iron is a type of cast iron. Carbon is found in cast iron in the form of flake graphite.

The fracture is gray. It has good casting and cutting performance and good wear resistance. It is used in the manufacture of racks, cabinets, etc.

Gray cast iron graphite is flake-like, the effective bearing area is relatively small, and the tip of graphite is easy to produce Zheng Sheng stress concentration, so the strength, plasticity and toughness of gray cast iron are lower than those of other cast iron. However, it has excellent vibration damping, low notch sensitivity and high abrasion resistance.

Gray cast iron is a common kind of iron casting, also called gray cast iron or ordinary cast iron.

The carbon content of the pre-gray cast iron is greater than that of flake graphite.

Gray cast iron code such as HT20-40, the front data is tensile strength, the back data is the chain bending strength.

Gray cast iron has good wear resistance, shock absorption, good casting and molding properties, and machinability.

With the above various properties, it is convenient to manufacture a large number of various products.

All kinds of boxes, sheds such as support seats, machine tool bodies, discs, sets of medium-load parts, etc.

I hope it can help you, welcome, like, and follow not to get lost.

Structure and properties of gray cast iron [Structure]: It can be seen as a matrix of carbon steel with flake graphite. According to the different matrix structures, gray cast iron is divided into three categories:

ferrite matrix gray cast iron; Ferritic - pearlite matrix gray cast iron; Pearlite matrix gray cast iron. [Mechanical properties]: The mechanical properties of gray cast iron are related to the structure of the matrix and the morphology of graphite.

The flake graphite in gray cast iron has serious slicing of the matrix, and it is easy to cause stress concentration at the sharp corners of graphite, so that the tensile strength, plasticity and toughness of gray cast iron are much lower than that of steel, but the compressive strength is equivalent to that of steel, and it is also the cast iron with the worst mechanical properties in commonly used iron castings. At the same time, the matrix structure also has a certain influence on the mechanical properties of gray cast iron, and the graphite sheet of ferrite matrix gray cast iron is coarse, with the lowest strength and hardness, so it is less used. The graphite sheet of pearlite matrix gray cast iron is small, has high strength and hardness, and is mainly used to manufacture more important castings; The graphite sheet of ferrite-pearlite matrix gray cast iron is slightly coarser than pearlite gray cast iron, and its performance is not as good as that of pearlite gray cast iron. Therefore, the gray cast iron with pearlite matrix is mostly used in industry.

Other properties]: good casting performance, good vibration damping, good wear resistance, good cutting performance, low notch sensitivity.

I don't want to say too complicated, simply put, gray cast iron is gray cast iron, the main feature is that the arrangement of carbon in iron refers to the sheet arrangement, with good casting performance, good vibration damping, good wear resistance, good cutting performance, low notch sensitivity is mainly used to cast cylinder block, cylinder head, etc.

Gray cast iron is often used because:1Gray cast iron has good shock absorption, and gray cast iron is used to make parts such as bases or racks on electromechanical equipment, such as dynamometer cast iron platforms.

It can effectively absorb the energy of the vibration of the machine, so as to play the role of damping, which is also the most important performance of gray cast iron.

2.Gray cast iron has good thermal conductivity, and when the cylinder block on the internal combustion engine is made of gray cast iron, the cylinder head can quickly get a lot of heat everywhere, which is very important for good thermal conductivity to be lower than that of mechanical and electrical equipment working at high temperatures.

3.Gray cast with Zhibo iron has good lubricating properties, and when using gray cast iron to make parts subjected to sliding friction on electromechanical equipment, Luxiang has good anti-friction performance. In the presence of moisture, graphite is a good lubricant, and once the graphite is detached from the substrate, the space left is convenient for storing lubricating oil, which is also one of the important conditions for gray cast iron as a good wear-resistant material.

4.When gray cast iron is repeatedly loaded under the same stress, it has the characteristics of increasing the number of loading, significantly reducing the bending degree of the strain curve, and reducing the residual plastic deformation after unloading. Cast iron platforms take advantage of this characteristic to achieve high casting stability by preloading a certain number of times before finishing.

5.Gray cast iron has good casting and cutting processability, its melting is more convenient, compared with cast steel, the melting temperature is lower, the melting equipment and smelting process are relatively simple, in terms of casting performance, the fluidity of gray cast iron liquid is good, and the casting is not easy to crack.