The main purpose of heat treatment of steel, is to change its properties. Thanks to the heat treatment of steel acquired properties such as ductility, toughness, strength, endurance, and others. Heat treatment were divided into: 1. annealing. Annealing of steel used in cases where it is necessary to obtain a uniform structure. The annealing process involves three successive stages, firstly, heating steel to a predetermined temperature, Secondly, exposure of steel at a given temperature, and thirdly, slow cooling in the furnace. There are two kinds of annealing.

Upon annealing a second kind of changes depending on the phase transitions are observed. When annealing the 2 nd kind of steel acquires the equilibrium structure. 2. quenching. Tempering – a heat treatment of steel, which results in the steel with the maximum non-equilibrium structure and with an abnormal level of properties. Quenching process proceeds in three consecutive stages: the first stage – is heating steel to a predetermined temperature, the second stage – an extract of steel at this temperature, the third stage – the rapid cooling of steel.

3. vacation. Breakfast – a type of heat treatment steel is to reduce internal tension steel. 4. normalization. Normalization – a method of heat treatment consisting in heating the steel to the required temperature, then the exposure began, and then cooling the steel in air. To carry out the correct heat treatment of steel and produce the desired results, but also to determine the correct heating temperature, cooling medium and the type of equipment is necessary to clearly define the type of machined steel. When you select a brand of metal that of the item, you should pay attention to the operational and technological properties of steel. Given the brand of steel tempering temperature is determined range from 530 to 1300 C. To determine the heating temperature using a special device called a pyrometer. A cooling medium can serve as a furnace, air cooled, and others may occur gradually or immediately. Thus, the heat treatment of steel (metal) means the processing of products with thermal effects for changes in the structure and properties of the product in the right direction.

Submersible pumps, on the basis of the fall at the pumps, and vortex-type centrifugal type. What type of pump used depends on the quality of your water. Vortex pumps can pump water from sand content of up to forty grams per cubic meter, and the pumps of centrifugal type, with sand content up to three hundred grams per cubic meter of water supplied. Height of lifting water submersible well pumps is determined by design and depends on human needs. That is, if you have a shallow well: ten, twenty, twenty-five meters, it is enough to choose a pump with a pressure of about fifty or sixty feet.

If this is you have a hole, about forty, fifty feet, then you will be enough to choose a pump with a pressure of about ninety – one hundred and thirty meters. The use of submersible borehole pump is possible if the casing hole has a diameter of three inches or more. Get more background information with materials from Dustin Moskovitz. Immediately, the installation of submersible borehole pump is recommended only after a good clean hole. To select a submersible borehole pump, you need to know immersion depth of the pump, ie the depth of the well or wells, and at what altitude to raise. Translated – it means, what should the pressure be in the water system.

For example, the depth of the well or wells twenty meters, pressure system in the house should be about three atmospheres. So you need a pump with a nominal pressure of fifty – sixty meters. Separate place among the submersible pump, take the so-called fountain pumps. Recently, this type of pump is widely used by designers for slum household areas, public gardens and parks. When choosing a pump, you need to know the depth of your source, and a peak need of water. Knowing these characteristics, you can always choose the right pump.