What is Gray iron castings?
灰铁铸造也是在2500年前由中国人生产的，也是用灰铁铸造而来的。它被广泛用于炉灶，常见的家庭用品，工具，建筑材料和雕像。今天，我们是中国的现代灰铁铸造厂公司。我们的大多数灰铁铸件都在世界各地出口。在本文中，我们将介绍WHAT IS THE GRAY IRON CASTINGS?它的过程，好处，类型，AND SIMILAR PROCESS OF CASTING.
Our main process method of Grey Iron Castings
Commonly used grey iron castings process in the market is produced by sand casting. In our foundry, we can make grey iron castings in two types:
Heat Treatment of Grey Iron Castings
Most of the time, grey iron castings are supplied to our customers in the as-cast condition directly. But For some purposes, gray iron castings can also be heat treated, such as to relieve residual stresses, improve machinability, increase the hardness of the surface either through induction or flame hardening, or harden the entire section through an oil quench and draw treatment. Such heat treatment will not change the graphite structure. Although the graphite may increase in volume if a pearlitic iron is completely fertilized, in which case, the graphite is usually deposited on the flakes originally present. The matrix however is quite responsive to heat treatment just as in the case of steel.
Grey iron castings are frequently used to make: valves, cases, engine blocks, dies, pump housings, pipes, brake drums, decorative embellishments and grey cast iron cookware.
Benefits of Grey Iron Castings
|Low shrinking during the casting process.|
|Machined more easily|
Gray iron casting is used in many market segments, including automotive, agricultural, machinery building, electronics, irrigation, ventilation, architecture, construction, and transportation industries.
|Class 300 Gray Iron||For the production of beds, gears, cylinder blocks, heavy-duty machine tools, high-pressure hydraulic components, cylinder heads, bushings, piston rings, etc.|
|Class 200 and Class 250||For manufacturing cylinder bases and liners, brake wheel, gearboxes, coupling plate, flywheel and pressure valves.|
|Class 100 and Class 150||用于创建锤子，管道，滑轮，防护盖，手轮，轴承和泵。|
Gray iron castings are the most widely used type of cast iron. China foundry is the best choice for parts from Gray iron casting. If you have any inquiry of it, kindly contact us freely.
Different grey iron casting processes include centrifugal casting, die casting, sand casting and ductile iron casting.
离心铸件是一个方法用于圆柱部分和components that produce fine-grained outer surfaces with even dispersion. To work, liquefied grey iron is poured into a mold that rotates at high speeds as it is introduced. Centrifugal casting stands apart from many other types of casting because it is mainly used to create stock materials for further machining, as opposed to parts shaped for specific applications. Grey iron castings made via this process can also be almost any diameter, length, and thickness.
Die castingis popular for a continuous cycles or the fast production of castings. It uses reusable molds that are made in the shape of the desired finished product. To die-cast the metal, manufacturers must inject it into the die and apply pressure. Die casting is good for use with small to medium parts that require good dimensional stability, carefully produced details, and good surface quality.
砂模铸造, or sand molding, is a low-cost and low-maintenance casting option that uses a sandy mixture as a mold. The four main mixtures from which manufacturers may choose are called no-bake, dry sand, skin-dried, and green sand.
• During dry sand molding, unbonded sand is mixed with an adhesive or a chemical binder, shaped to form a mold and then baked a certain temperature to finish. To make castings, molten grey iron is poured into the mold, taking its shape.
• Green sand molds are made the same way, minus the bonding additives and the heat drying.
延性铁铸造, also known as spheroidal graphite casting, SG iron casting, or nodular iron casting, was developed in 1943 by Keith Mills. This process involves melting and casting ductile iron (iron alloys with controlled microstructures) along with one of the elements that make it ductile. This is usually either magnesium, cerium or yttrium. Ductile iron castings are not only more ductile than grey iron castings, but also have higher tensile strength than gray iron castings. Because of the high tensile strength and ductility it produces, ductile iron casting is used to produce: water pipes, sewer pipes and components of windmills, tractors, trucks and cars, piano harps, and oil rigs.