What is Gray iron castings?

什么是灰铁铸造?灰铁铸造,也称为灰铁铸造,是铸造部分,通常是由冶炼灰铁制成的。这是一种铁铸造。灰铁是由铁和碳制成的合金。它还具有磷,硫,硅和锰的痕迹。灰铁或灰色铸铁是具有石墨微结构的铸铁的材料类型。因此,由于断裂的灰色,它被称为灰铁。

灰铁可以满足硬度和磨损的特定要求。热处理可以产生更高的机械性能。它具有高导热率,强度,耐用性,可加工性和低成本的特征。因此,灰铁被广泛用于阀门,发动机块,制动鼓,泵外壳和铸铁炊具。

灰铁铸造在铸造厂结束。灰铁铸件是通过将熔融的铁合金倒入模具中制成的。完成的铁铸造可能是加工的。但是在任何温度下都不能锻造或挤出灰铁。因此必须施放。

灰色铸造 - 摩托车零件

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.

灰色铸造

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:

类型1:丢失的泡沫铸造

铸铁组件的唯一投资铸造过程是生产小型灰铁投资铸件的优势,例如节省的霉菌成本,缩短了生产周期并提高了生产效率。借助丢失的泡沫铸造过程,我们可以帮助客户获得具有出色表面表面处理的高精度产品,并且将进行更少的加工操作。

类型2:树脂砂铸件

中小型铸件的主要沙子铸造过程。与其他沙子铸造过程相比,树脂砂铸造是一种接近投资铸造的相对精确的铸造方法。作为树脂砂的良好刚度和早期铸造时的高强度,我们可以有效消除收缩腔,灰铁铸件的收缩缺陷。

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.

灰铁铸件的加工能力

灰铁供应可加工的硬度水平。在内部加工设施的情况下,我们也可以在铸造后进行加工。一旦我们的客户对灰铁铸件有加工要求,最好为我们提供铸造和完成的图纸。我们的工程团队将严格指向加工图纸的机器产品。我们的加工能力可以大大降低客户的额外成本。

灰铁铸造用于许多市场领域,包括汽车,农业,机械建筑,电子,灌溉,通风,建筑,建筑和运输行业。

典型的成品灰铁铸造产品。

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

使用灰铁铸造有许多重要的好处。灰铁铸件可以是:

熔化,焊接和机器的高碳含量。
Low shrinking during the casting process.
耐腐蚀
高电导率,非常适合炊具。
Machined more easily
用于需要高强度与体重比的应用
Dimensional stability
使用脱离设备以大量的经济生产

灰铁铸造应用

Gray iron casting is used in many market segments, including automotive, agricultural, machinery building, electronics, irrigation, ventilation, architecture, construction, and transportation industries.

灰铁铸件是建造高度耐用和强大产品的最佳选择。

根据其成绩或班级:

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.

变化和类似过程

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.

https://www.youtube.com/watch?v=zxva-httunu

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.

•无烘烤模具是一次性模具,由沙子制成,快速构建的树脂和催化剂。它们是在铸造瓶的帮助下形成的,该瓶通常由塑料,木材或金属制成。没有烘焙模具采用无热的,冷的铸造过程。

• 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.

•要使用皮肤干燥的成型方法创建模具,也称为风干成型,操作员混合水,沙子,粘土和粘合添加剂等粘合剂,然后用火炬或加热灯干燥。

• Green sand molds are made the same way, minus the bonding additives and the heat drying.

https://www.youtube.com/watch?v=K8SYhISGxN4

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.