د قند کولو لس عام میتودونو لنډیز د لوړې فریکونسۍ ماشین ماشین (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. دوه ځله متوسط ​​​​قطره کول

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

د مارټینسیتیک درجه بندي کول: فولاد په مایع متوسط ​​​​کې ډوبیږي (د مالګې حمام یا الکلي حمام) د تودوخې له پورتنۍ مارټینز پوائنټ څخه یو څه لوړ یا ټیټ تودوخې سره ، د مناسب وخت لپاره ساتل کیږي ، او داخلي او بهر. د فولادو برخې درملنه کیږي. وروسته له دې چې طبقه منځنۍ تودوخې ته ورسیږي، دا د هوا د یخولو لپاره ایستل کیږي، او سوپر کول شوي آسټینایټ ورو ورو د مارټینسایټ په قند کولو پروسې بدلیږي. دا په عموم ډول د پیچلي شکلونو او سخت خرابوالي اړتیاو سره د کوچني ورک پیسونو لپاره کارول کیږي ، او د لوړ سرعت فولادو او لوړ الماس فولادو وسیلې او ډیز هم د دې میتود لخوا په عموم ډول شنډیږي.

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;