Castings are metal moulding objects obtained by various casting methods, i.e. the smelted liquid metal is injected into the pre-prepared casting mould by pouring, pressure injection, inhalation or other casting methods, and after cooling and subsequent processing means such as polishing, the objects with certain shape, size and performance are obtained, cast iron water pump parts can also be cast by this method.
The theory of casting forming metal liquid forming often called casting, casting forming technology has a long history. As early as 5000 years ago, our ancestors can cast red copper and bronze products. Casting is the most widely used liquid metal forming process.
In machinery and equipment in the liquid forming parts accounted for a large proportion of machine tools, internal combustion engines, mining machinery, heavy machinery, liquid forming parts accounted for 70% to 90% of the total weight; in the car, tractor accounted for 50% to 70%; in agricultural machinery accounted for 40% to 70%. Liquid forming process can be so widely used, because the casting has the following advantages: (1) can be manufactured inside the cavity, the shape of the blank is very complex. Such as a variety of boxes, machine tool beds, cylinder blocks, cylinder heads and so on. (2) Process flexibility, wide adaptability. Liquid forming parts of almost unlimited size, its weight can be from a few grams to hundreds of tonnes, its wall thickness can be from 0.5mm to 1m or so. Where the industry can dissolve into liquid metal materials can be used for liquid forming. For cast iron with poor plasticity, liquid forming is the only way to produce its blanks or parts. (3) Liquid forming parts at a lower cost. Liquid forming can directly use the waste parts and chips, equipment costs are low. At the same time, liquid forming parts have small machining allowances, saving metal.
However, liquid metal forming has many processes and is difficult to control accurately, which makes the casting quality not stable enough. Compared with forgings of the same material, because of the loose tissue and coarse grain of liquid forming, it is easy to produce internal defects such as shrinkage, shrinkage and porosity. Its mechanical properties are lower. In addition, the labour intensity is high and the conditions are poor. Have excellent mechanical and physical properties, it can have a variety of different strength, hardness, toughness with the comprehensive performance, but also can be both one or more special properties, such as wear resistance, high and low temperature resistance, corrosion resistance. The weight and size range of the casting parts are very wide, the lightest weight is only a few grams, the heaviest can reach 400 tonnes, the thinnest wall thickness is only 0.5 mm, the thickest can be more than 1 metre, the length can be from a few millimetres to more than ten metres, to meet the requirements of different industrial sectors of use. Whether you want pump casting parts or pump impeller casting, we can meet your requirements.