The Heat Treatment process of Steel Casting happens in 3 stages and they are like
1. heating for quenching
2. quenching
3. drawing
HEATING FOR QUENCHING
Heating for quenching is best directed gradually, particularly on account of castings of variable thickness. Breaks may happen either in heating or in cooling, because of various temperatures at various purposes of the casting. The castings ought to be completely splashed at the greatest temperature (for the most part 1,500° to 1,600° F.), 1 hr. being adequate for segments 1 ft. in thickness. The base temperature that will provide the best solidifying effect will be discovered to be the most palatable in all situations, since the grain coarsens when the fundamental reach is exceeded to an extreme degree. All temperatures should be administered by a checked pyrometer with the hot intersection to the heated item, and with a few couples in a huge heater to guarantee a uniform temperature.
QUENCHING PROCESS
The casting should be moved as fast as conceivable from the heater to the quenching shower, and on account of enormous castings, for example, train outlines, this is in no way, shape or form a basic issue. The bigger castings are best dealt with by methods for cranes and rollers. The quenching operator utilized is by and large water or oil, ideally the previous, on account of its affordability and exceptional cooling impact, all the more promptly separating the coarse cast-steel grain. With unpredictable castings, it is commonly best to utilize oil. With water, it is conceivable to have an enormous tank and a huge running stream, serving to keep up a uniform temperature. Castings ought to never be tossed and to lay on the lower part of the tank, however ought to be unsettled to forestall the arrangement of a covering of fume, impeding the quenching impact. It is likewise best, at whatever point conceivable, to quench the thicker segments first.
DRAWING OPERATION
Normalized steels are more grounded and harder than annealed steels. In the standardized condition, steel is a lot sturdier than in some other auxiliary condition. Parts exposed to affect and those, which require the greatest sturdiness with protection from outside pressure are by and large standardized. In normalizing, the mass of metal affects the pace of cooling and the subsequent structure. Dainty pieces cool quicker and are sturdier subsequent to normalizing than thick ones. At whatever point conceivable, the drawing ought to be done in a shower or something to that effect, for example, lead, barium chloride, a barium chloride-salt blend, or oil. On account of enormous castings, this is obviously inconceivable, and incredible consideration ought to be practiced in getting a uniform temperature in the drawing heater.
ABOUT KEVA
Keva Casting is a professional casting company that focuses on Construction, Machinery, Automobile, Hardware, Pipeline and many other industries.
We provide top quality products with the best service based on our complete production chain including our own mold design, advanced production techniques, and full management of the supply chain. Keva Casting has two factories located in Zhucheng, China's Shandong province.
We use "shell molding", which is a new technique that has been developed in recent years.This new technique has simplified production procedures and reduced air pollution compared with traditional sand casting and investment casting. Shell making and core making are faster to ensure production in enormous quantities. The dimensions and surface finishing are satisfactory for all kinds of industrial requirements. Besides supplying our own formwork & scaffolding systems, our casting products also supply OEM services in various industries.