锯片基体材料的非调质生产工艺

Non-quenching and tempering manufacturing process of saw blade matrix material

为了降低锯片基体生产成本并提高产品质量,以特定Si-Mn系试验钢为研究对象,采用TM CP工艺对新型锯片基体材料进行了研究.利用扫描电子显微镜、拉伸试验机等试验设备对基体材料的组织和力学性能进行了分析测试.结果表明,当轧后冷速为32.3℃/s时,可以获得以细小束状贝氏体为主的显微组织,且该冷速下基体材料的抗拉强度、屈服强度可以分别达到1 315与1 030 M Pa,冲击吸收功可以达到53.9 J,同时试验钢的弹性模量与弹性极限分别为198.5 GPa和915.4 M Pa.此外,经过8万次循环载荷作用后,试验钢的三点弯曲永久变形高度为0.21 mm,试验钢表现出较好的综合机械性能.采用非调质工艺生产的Si-Mn系贝氏体钢可以用作锯片基材.

In order to reduce the manufacturing cost of sawblade and improve the product quality,a newtype sawblade matrix material was studied with the TMCP process though taking the special Si-Mn steel as the study object. The microstructure and mechanical properties of matrix material were analyzed and measured with such testing equipment as scanning electron microscope（ SEM） and tensile testing machine.The results showthat when the cooling rate after rolling is 32. 3 ℃/s,the microstructure mainly composed of fine lath bainite can be obtained,the tensile strength and yield strength of matrix material respectively reach 1 315 and 1 030 MPa,and the impact absorbed energy can reach 53. 9 J at this cooling rate. At the same time,the elastic modulus and elastic limit of test steel are 198. 5 GPa and 915. 4 MPa,respectively. In addition,after 80 000 times of cyclic loading,the three-point bending permanent deformation height of test steel is 0. 21 mm,and the test steel shows better comprehensive mechanical properties. Furthermore,the Si-Mn series bainite steel produced by the non-quenching and tempering process can be used as the sawblade substrate matrix material.