The high-speed steel cutting tool has advantaged i n modern cutting tool for its preferable synthetical performance, especially, in a pplication of complicated cutting tools. Therefore, the study of the high-speed ste...The high-speed steel cutting tool has advantaged i n modern cutting tool for its preferable synthetical performance, especially, in a pplication of complicated cutting tools. Therefore, the study of the high-speed steel cutting tools that occupied half of cutting tools has become an importa nt way of studying on modern cutting technology. The cutting performance of hi gh speed-steel cutting tools will be improved by magnetization treating method. Microstructure of high-speed steel will be changed as a result of magnetizatio n, and the effect of mechanism and electromagnetism. Magnetic domain was re-arr anged under outer magnetic field for the magnetism of high-speed steel. When th e high-speed steel tools were treated in pulse magnetic field, the intensity H of which is get to 19 Kves, the boundary of magnetic domain will be replaced ham mered by this kind of intensive pulse, causing flexibility deformation and elast ic stress. The interaction between the elastic field and the initial dislo cation field will lead to expansion and transfer of dislocation, fining of g rains, distortion of crystal lattice, and increase of hardness. Obtained by expe riment, the hardness is raised HRC 0.6～0.9, it is to whole tool. Magnetized in p ulse magnetic field without measure, too many dislocations will accumulate on th e interface of, and the tool will be brittle. Many factors such as magnetic filed intensity, magnetization time and chemical c omponent of high-speed steel will influence the capability of magnetized cuttin g. This paper, according to the test, analyzed and compared the difference effec ts between the magnetized high-speed steel cutting tool and the non-magnet ized high-speed steel cutting tool on cutting force, power, heat, accuracy, ser vice life and etc. It also put forward the relation of cutting factor and cuttin g capability, and the relation of magnetic parameter and cutting capability.展开更多
文摘The high-speed steel cutting tool has advantaged i n modern cutting tool for its preferable synthetical performance, especially, in a pplication of complicated cutting tools. Therefore, the study of the high-speed steel cutting tools that occupied half of cutting tools has become an importa nt way of studying on modern cutting technology. The cutting performance of hi gh speed-steel cutting tools will be improved by magnetization treating method. Microstructure of high-speed steel will be changed as a result of magnetizatio n, and the effect of mechanism and electromagnetism. Magnetic domain was re-arr anged under outer magnetic field for the magnetism of high-speed steel. When th e high-speed steel tools were treated in pulse magnetic field, the intensity H of which is get to 19 Kves, the boundary of magnetic domain will be replaced ham mered by this kind of intensive pulse, causing flexibility deformation and elast ic stress. The interaction between the elastic field and the initial dislo cation field will lead to expansion and transfer of dislocation, fining of g rains, distortion of crystal lattice, and increase of hardness. Obtained by expe riment, the hardness is raised HRC 0.6～0.9, it is to whole tool. Magnetized in p ulse magnetic field without measure, too many dislocations will accumulate on th e interface of, and the tool will be brittle. Many factors such as magnetic filed intensity, magnetization time and chemical c omponent of high-speed steel will influence the capability of magnetized cuttin g. This paper, according to the test, analyzed and compared the difference effec ts between the magnetized high-speed steel cutting tool and the non-magnet ized high-speed steel cutting tool on cutting force, power, heat, accuracy, ser vice life and etc. It also put forward the relation of cutting factor and cuttin g capability, and the relation of magnetic parameter and cutting capability.
