Soo koobid toban hab oo caadi ah oo deminta mashiinka deminta soo noqnoqda (1)

1. Single medium (water, oil, air) quenching

Single medium (water, oil, air) quenching: Quenching the workpiece that has been heated to the quenching temperature into a quenching medium to cool it completely. This is a simpler quenching method and is often used for carbon and alloy steel workpieces with simple shapes. The quenching medium is selected according to the heat transfer coefficient, hardenability, size and shape of the parts.

2. Deminta dhexdhexaadka ah oo labanlaab ah

Dual-medium quenching: The workpiece heated to the quenching temperature is first cooled to the Ms point in the quenching medium of a high-frequency heating machine with strong cooling capacity, and then transferred to the slow-cooling quenching medium to cool to room temperature to achieve different quenching cooling temperatures range, and has an ideal quenching cooling rate. It is used for complex shapes or large workpieces made of high carbon steel and alloy steel, and carbon tool steel is also mostly used in this method. Commonly used cooling media are water-oil, water-nitrate, water-air, oil-air. Generally, water is used as a quick-cooling quenching medium, oil or air is used as a slow-cooling quenching medium, and air is less used.

3. Martensite graded quenching

Deminta Martensitic : Birta waa la hagaajiyay, ka dibna waxaa lagu rusheeyaa dhexdhexaad dareere ah (qubeyska milixda ama qubeyska alkali) oo leh heerkul wax yar ka sarreeya ama ka hooseeya barta sare ee Martens ee birta, oo lagu hayo wakhti ku habboon, gudaha iyo dibaddaba. qaybo ka mid ah birta ayaa lagu daaweeyaa. Ka dib marka lakabku gaaro heerkulka dhexdhexaadka ah, waxaa loo soo saaraa qaboojinta hawada, iyo austenite supercooled ayaa si tartiib tartiib ah loo beddelaa habka deminta ee martensite. Waxaa guud ahaan loo isticmaalaa workpieces yar yar oo leh qaabab adag iyo shuruudaha qallafsanaan adag, iyo birta-xawaaraha sare ah iyo qalabka birta daawaha sare iyo dhinta ayaa sidoo kale sida caadiga ah demi by habkan.

4. Martensite graded quenching method below Ms point

Martensitic graded quenching method below Ms point: When the bath temperature is lower than the Ms of the workpiece steel and higher than Mf, the workpiece cools faster in the bath, and the same result as the graded quenching can be obtained when the size is larger. Commonly used for larger size low hardenability steel workpieces.

5. Bainite isothermal quenching method

Bainite isothermal quenching method: The workpiece is quenched into a bath with the lower bainite temperature of the steel at an isothermal temperature, so that the lower bainite transformation occurs. Generally, it is kept in the bath for 30~60min. There are three main steps in the bainite isothermal quenching process: ① austenitizing treatment; ② cooling treatment after austenitizing;