| dc.description.abstract | Thermomechanical process has been done on the VCN 150 Bohler steel material
to improve the mechanical properties of the material to be used as palm harvester
blade. Thermomechanical process by varying the heating at a temperature of 700 °
C, 750 ° C, 800 ° C, 850 ° C and 900 ° C with a forging process / hammering at
the detention time 5s, 10s, 15s and 20s gradually. Results of hardness testing
temperature optimum value of each hammer blow terjati in 10 seconds , at BHN
506.6 BHN , 499.2 BHN 491.8 BHN , 266.2 BHN and 275.8 BHN each variation
suhu. three highest optimum value of hardness test results taken for the tensile test
results obtained the optimum tensile testing with a ultimate stress of 1149.305
MPa and yield stress 930 506 MPa on temperature 700 ° C/10s.Correlation the
mechanical properties , where the smaller the grain size the hardness and tensile
strength will increase . As for the warming relationship between deformation and
grain size , which at the same time 10 seconds blow the higher the heating
temperature increasing deformation and followed enlarged grain diameter .
Thermomechanical process can fix the mechanical properties and reduce the size
of the grain diameter steel BOHLER VCN 150 | en_US |
