Xu H.,Chengdu Chengliang Tools Group Co. |
Xu Q.,Chengdu Chengliang Tools Group Co. |
Chen L.,Chengdu Chengliang Tools Group Co. |
Wu L.,Heye Special Steel Co. |
And 3 more authors.
Jinshu Rechuli/Heat Treatment of Metals | Year: 2014
Contrast tests of the hardness, hot hardness, bending strength and cutting performance of taps quenched and tempered with corresponding materials of M3, M2 and M35 steels were carried out. The results show that the hardness and hot hardness of M3 and M35 steels quenched and tempered are significantly higher than that of the M2 steel, while there is no obvious difference between the M3 and M35 steels. The bending strength of M2 steel is higher than that of the M3 and M35 steels. When quenched at 1160~1180°C, there is of little difference between the bending strength of M3 and M35 steels; when quenched at 1180~1240°C, the bending strength of M3 steel is lower than that of M35 steel; however when quenched above 1220°C, all bending strength of these three steels falls sharply. The quenching temperature range of M2 and M35 steels used for tap is wider than that of M3 steel. The cutting performance of M3 steel tap is best. M3 steel is more suitable to the taps with improving toughness and grinding performance.