Experimental Investigations on Heat Treatment of Cold Work Tool Steels: Part 1, Air-hardening Grade (d2)
نویسندگان
چکیده
The present experimental investigations deal with the improvement of mechanical properties of cold work tool steels through different heat treatment processes. An attempt was made to get optimal combination of hardness and toughness through changes of microstructure by heat treatment. The toughness of D2 tool steel increases with tempering temperature. The hardness of D2 tool steel decreases with increase of tempering temperature. At lower tempering temperature range (160 o C-200 o C), the effect of tempering temperature on hardness is very small but as the tempering temperature increases hardness becomes prominent. The hardness of D2 tool steel increases with austenitizing temperature and the lowest and highest hardness were obtained at 970 o C and 1000 o C respectively. Results were compared with standard conventional test results. It is observed that different heat treatment processes significantly improves the mechanical properties like hardness, toughness and microstructure of cold work tool steel.
منابع مشابه
Effect of Cryogenic Treatment on Mechanical Properties of Cold Work Tool Steels
In this paper effect of cryogenic treatment on mechanical properties of cold work tool steels at various combination of heat treatment cycle (process sequence) are studied. The material selected for these processes are AISI D2 and D3.Cryogenic treatment is commonly referred as cryotreatment, is an add-on process to the conventional heat treatment of tool steel. Cryogenic treatment improves hard...
متن کاملEnhancement of mechanical properties of low carbon steel based on heat treatment and thermo-mechanical processing routes
Thermal treatments and thermo-mechanical processing routes were applied on a conventional structural steel (st37 steel: 0.12C-1.11Mn-0.16Si) for improvement of tensile properties and enhancement of work-hardening behavior. Full annealing resulted in a sheet with coarse ferrite grains and pearlite colonies arranged alternatively in distinct bands, which showed high ductility, low strength, and t...
متن کاملProcessing of Fine-Grained DP300/600 Dual Phase Steel from St12 Structural Steel by the Thermo-Mechanical Processing of Cold Rolling and Intercritical Annealing
The effect of microstructural refinement and intercritical annealing on the mechanical properties and work-hardening response of a low carbon St12 steel was studied. It was revealed that intercritical annealing of the ferritic-pearlitic sheet results in the formation of a coarse-grained DP microstructure with discrete martensite islands normally formed in place of pearlitic colonies, which resu...
متن کاملPredicting the Abrasion Resistance of Tool Steels by Means of Neurofuzzy Model
This work considers use neurofuzzy set theory for estimate abrasion wear resistance of steels based on chemical composition, heat treatment (austenitising temperature, quenchant and tempering temperature), hardness after hardening and different tempering temperature and volume loss of materials according to ASTM G 65-94. Testing of volume loss for the following group of materials as fuzzy data ...
متن کامل