Flexure deformation of quenching on 65Mn circular saw blade
SHAO Chuan- wei,YAN Wei,REN Yi- bin,SHAN Yi- yin,YANG Ke
（Shenyang Advanced Materials Research and Development Center, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, Liaoning, China）
Abstract：Metal circular saw blade is widely used in the cutting of metal materials and stones, which has a vital position in industries. Quenching is the first step of the production of circular saw blade and has a significant effect on the quality of saw blade. It has been found that the 1200 class 65Mn circular saw blade has a remarkable flexure deformation after quenching and flattening treatment, but this deformation disappears after second quenching and flattening treatment. Based on the microstructure and hardness of the quenched 65Mn saw blade and by use of the MARC simulation software, the heating process of first quenching treatment was studied. It was found that after the first heating process in which the temperature ranges between 715.9℃ and 702.2℃ the saw blade was not fully austenitized. In the second heating process, since the austenitizing rate of martensite exceed the lamellar pearlite, the austenitizing degree and the relevant properties of the saw blade were improved, and thus the flexure deformation disappeared.
2015, Vol. 25 
