CHANGE IN THE STRUCTURE OF A FRACTURE AND THE IMPACT STRENGTH OF 3X13H7C2 STEEL AS A RESULT OF OVERHEATING IN HOT WORKING UNDER PRESSURE AND HEAT TREATMENT,
Abstract
Brittle fracture with a crystalline appearance may develop in steel owing to the presence of pearlite and bainite in the microstructure or owing to the development of temper brittleness and over heating during hot working and heat treatment. The article deals with changes in the structural appearance of fracture of 3X13H7C2 steel (0.28 percent C, 2.5 percent Si, 0.55 percent Mn, 12.9 percent Cr, 6.95 percent Ni, 0.20 percent S, 0.025 percent P) due to overheating during die forging at 850, 950, 1050, 1150 and 1200 degrees C (degree of deformation 40 percent) and heat treatment (quenching from 1050 degrees in water (40 min) plus annealing at 870 degrees C (7 hr), cooling with furnace plus normalizing at 670 degrees C (70 min), cooling in air plus quenching from 850 degrees C (40 min) in oil. Following this treatment specimens of the steel were subjected to mechanical tests at room temperature. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 30, 1969
- Accession Number
- AD0693455
Entities
People
- A. M. Tamarina
- I. E. Konorovich
Organizations
- National Air and Space Intelligence Center