Tempered steels are unalloyed and alloyed machinery manufacturing steels that are suitable for hardening due to their chemical composition, especially in terms of carbon content, and show high toughness at a certain tensile strength at the end of the tempering process. The reclamation process is defined as the whole process of first hardening and then tempering, which will ultimately give the steel part high toughness. Due to the superior mechanical properties they gain as a result of the conditioning process, tempered steels are used in a wide range of areas, including various machine and engine parts, forged parts, various bolts, nuts and bolts, crankshafts, axles, control drive parts, piston rods, various shafts, and gears. used in the field. For this reason, tempered steels are the type of steel produced and used at the highest rate after construction and unalloyed steels.
Selection of the appropriate tempering steel and application of the correct tempering process requires great care and experience. The good results of the reclamation process (achieving the desired toughness or hardness value) are closely related to the cleanliness of the internal structure of the steel used.
Internal structure cleaning is the process of purifying liquid steel from molten gases (hydrogen, oxygen and nitrogen) and cleaning it from oxide-sulfur inclusions.
- 4140 (42CrMo4 tempered steel)
- 4340 (34CrNiMo6 tempered steel)
- 5140 (41Cr4 tempered steel)
