A few common nouns in elbow heat treatment

TIME：2019-05-25

A few common nouns in elbow heat treatment:

1. Positive fire: heat the steel or steel parts to the critical point AC3 or the appropriate temperature above the ACM for a certain period of time to cool in the air and get the heat treatment process of the pearlitic group.

2, annealing annealing: hypoeutectoid steel workpiece heated to above AC3 20 to 40 degrees, heat preservation after a period of time, with the slow cooling furnace (or buried in the sand or lime cooling) to 500 degrees Celsius in air cooling heat treatment process.

3, solid solution heat treatment: keep single-phase zone temperature alloy is heated to high temperature, the excess phase dissolves into solid solution, and then rapidly cooling, to get the supersaturated solid solution heat treatment process.

4. Aging: after the alloy has been heated by solid solution or cold plastic deformation, the performance of the alloy can change with time when placed at room temperature or slightly higher than room temperature.

5. Solid solution treatment: to fully dissolve the various phases in the alloy, strengthen the solid solution, improve the toughness and corrosion resistance, eliminate stress and softening, so as to continue processing and forming.

6. Aging treatment: heating and retaining the temperature of the precipitated phase, so as to precipitate the strengthening phase precipitates and harden and improve the strength.

7, quenching: steel austenitizing with proper cooling, cooling speed after all or certain parts within the cross section within the scope of martensite and unstable organization structure change of heat treatment process.

Eight will after quenching and tempering: workpiece heated to a critical point of AC1 under proper temperature keeping time, method of cooling, then used to meet the requirements for the organization and performance of the heat treatment process required.

Treatment of quenching and tempering: a heat treatment that combines quenching with high temperature tempering is called a temperature-regulating treatment. The quality control is widely used in various important structural parts, especially the connecting rods, bolts, gears and shafts that work under the changing load. After the processing of the quality control, the mechanical properties of this group are better than those of the same rigid body. Its hardness depends on the temperature tempering temperature and the tempering stability of the steel and the section size of the workpiece, generally between HB200 and 350.