Quenching: refers to the heat treatment process of heating the steel to a temperature above Ac3 or Ac1 (the lower critical temperature of the steel) for a certain period of time and then obtaining the martensite (or bainite) structure at an appropriate cooling rate. . Common quenching processes include salt bath quenching, martensite quenching, bainite austempering, surface quenching and partial quenching. The purpose of quenching: to obtain the desired martensite structure of the steel, improve the hardness, strength and wear resistance of the workpiece, and prepare the structure for the subsequent heat treatment. Hardenability: refers to the characteristics of determining the hardening depth and hardness distribution of steel under specified conditions. The hardenability of the steel is good and poor, and it is usually expressed by the depth of the hardened layer. The greater the depth of the hardened layer, the better the hardenability of the steel. The hardenability of steel depends mainly on its chemical composition, especially the alloying elements and grain size with increased hardenability, heating temperature and holding time. The steel with good hardenability can obtain uniform and uniform mechanical properties of the whole section of the steel and quenching agent with small quenching stress of steel parts to reduce deformation and cracking. Microscope Slides And Cover Slips 1. The glass slide is used to put the sample to be tested, and the cover glass is covered on the sample to be tested.
6. The cover glass is square, the slide glass is rectangular, and the width is longer than the side of the cover glass.
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2. The glass slide is at the bottom, which is the carrier for the material you want to observe, that is, you want to put something on it.
3. The cover glass is smaller than the slide glass. The glass slide is mainly used to hold the observation objects. The cover glass is covered on the slide glass and used for fixing.
4. The glass slide is a thicker piece of glass in the transfer slide, which is used to carry the real object. The cover fragment is the small round or square thin one.
5. Mounting is a general term for a set of things, including slides, coverslips and loaded objects
What is quenching and what is hardenability?