Bearing steel quenching hardness

    (1) Annealing: A heat treatment process in which a metal material is heated to an appropriate temperature for a certain period of time and then slowly cooled. Common annealing processes include: recrystallization annealing, stress relief annealing, spheroidizing annealing, and complete annealing. The purpose of annealing: mainly to reduce the hardness of metal materials, improve plasticity, to facilitate cutting or pressure processing, reduce residual stress, improve the homogenization of the composition and composition, or prepare the tissue for the subsequent heat treatment.

  (2) Normalizing: refers to a heat treatment process in which steel or steel is heated to or above (the upper critical point temperature of steel) and is kept at a temperature of 30 to 50 ° C for a suitable period of time. The purpose of normalizing is to improve the mechanical properties of low carbon steel, improve machinability, refine grains, eliminate tissue defects, and prepare for post-heat treatment.

  (3) Quenching: refers to 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 martensite (or bainite) structure at an appropriate cooling rate. Heat treatment process. 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, to improve the hardness, strength and wear resistance of the workpiece, and to prepare the tissue for the subsequent heat treatment.

  (4) Tempering: refers to the heat treatment process in which the steel is hardened and then heated to a temperature below for a certain period of time and then cooled to room temperature. Common tempering processes are: low temperature tempering, medium temperature tempering, high temperature tempering and multiple tempering.
The purpose of tempering: mainly to eliminate the stress generated by the steel during quenching, so that the steel has high hardness and wear resistance, and has the required plasticity and toughness.

  (5) Tempering and tempering: refers to the composite heat treatment process of quenching steel and steel parts and high temperature tempering. The steel used for quenching and tempering is called quenched and tempered steel. It generally refers to medium carbon structural steel and medium carbon alloy structural steel.

  (6) Carburizing: Carburizing refers to a process in which carbon atoms are infiltrated into a steel surface layer. It also makes the low carbon steel workpiece have the surface layer of high carbon steel, and after quenching and low temperature tempering, the surface layer of the workpiece has high hardness and wear resistance, while the central part of the workpiece still maintains the toughness of low carbon steel. Plasticity.https://www.supplyforever.com/

FAG four point contact ball bearing

Four-point contact ball bearings are single-row angular contact ball bearings that can withstand high loads in both directions in the axial direction and can only withstand low loads in the radial direction. In order to ensure low friction, especially at high speeds, it is required to ensure a minimum axial load. The fag four-point contact ball bearing is a double-half inner ring so that as many steel balls as possible can be loaded. The outer ring assembly with the steel ball and the half inner ring can be installed independently, and the bearing self-aligning ability is small. The basic type of fag four-point contact ball bearing is due to the large number of steel balls, the height of the shoulder and the contact angle of 35°.
The four-point contact ball bearing has a high axial load carrying capacity. When the four-point contact ball bearing is used as a thrust bearing, a large matching clearance is left between the bearing seat and the outer ring of the bearing to ensure that it does not bear radial force. The large four-point contact ball bearing outer ring has two positioning grooves for fixing the outer ring (bearing code suffix N2).
The four-point contact ball bearing axial clearance basic type of fag four-point contact ball bearing uses a standard group clearance. Larger clearance groups (code suffix C3) can also be used when needed. FAG Four-Point Contact Ball Bearing Cage Most FAG four-point contact ball bearings feature a machined brass solid cage (code suffix MPA) that is guided by the outer ring. The four-point contact ball bearing code holder of the glass fiber reinforced polyamide 66 is suffixed as TVP. The glass fiber reinforced polyamide cage can be used at a stable temperature of 120 °C. If the bearing is lubricated with oil, if the temperature exceeds 100 ° C, any additives in the lubricant will reduce the life of the cage. Therefore, the oil change cycle must be strictly controlled. The FAG four-point contact ball bearing allows the fag four-point contact ball bearing to operate at high speeds only when the rotational speed is only affected by the axial load.
The four-point contact ball bearing heat treatment heat treatment FAG four-point contact ball bearing operating temperature can reach 150 degrees Celsius, the outer ring diameter greater than 240mm bearing working temperature up to 200 ° C can also maintain the external dimensions. However, it should be noted that the operating temperature of the bearing is limited when the cage material is polyamide.

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