奥氏体不锈钢1Cr18Ni9Ti的切削机理

通过试验表明,干切削奥氏体不锈钢1Cr18Ni9Ti,切削速度在0.33 m/s左右,摩擦系数μ最大,积屑瘤最高,切屑变形系数_l和切削力F_z最小,且与切削速度量驼峰性规律变化;随走刀量增加_l和μ有规律地减小,F_z增加;随前角γ_o增大μ增大而_l及F(?)却有规律地减小;给出用“量纲分析-二次通用旋转组合设计”综合试验法求得的计算切削力的经验公式: F_z=8.65×10~(12)α_p~(0.202+0.215nv)f~(-0.92+0.071nα)_pV~(-1.74),N。

On the Cutability of Austenite Stainless Steel 1Cr18Ni9Ti

Workpieces were cutted without lubrication and measured to find out the reasons that lCrl8Ni9Ti is hard of cutting. At the cutting speed about 0.33 m/s the maximum friction factor and highst build-up take place with the minimum coefficient of chip deformation and principal cutting force- the lattre two parameters represent the hump-like dependences on cutting speed. The increase in feed leads to the decreasing coefficient of chip deformation and friciton factor but the increasing force, while the increase in the front rake of tool leads to the increasing friction factor but the decreasing coefficient of chip deformation and cutting force. A semi-empirical formula is offered to calculate the cutting force through a so-called design of experiment as "dimension analysis-quadratic rotational combination".