Abrasive Wear in Machining: Experiments With Materials of Controlled Microstructure
Abrasive Wear in Machining: Experiments With Materials of Controlled Microstructure
复制标题
机械加工中的磨粒磨损：受控微观结构材料的实验
DOI：
10.1115/1.3224987
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发表时间：
1981
影响因子：
1.2
通讯作者：
P. Wright
中科院分区：
文献类型：
--
作者：
S. Ramalingam;P. Wright
有证据表明，铁基合金中的硬夹杂物通过降低刀具寿命而降低切削性能。对含不同磨料量的fe - c -二氧化硅和fe - c -氧化铝粉末金属压块进行了加工实验。此外，还对两种不锈钢进行了比较。其中一种是钛稳定的，因此含有坚硬的TiC颗粒；另一种是不稳定的，没有这种粒子。刀具磨损率随硬质夹杂物体积分数的增加而增加。磨料磨损机理已通过详细的金相分析确定。当使用高速钢进行加工时，塑料犁削过程会造成前刀面磨损，如果刀具热削弱，这种磨损会加剧。用硬质合金刀具加工时，弹坑区域的温度足以使刀具材料发生相同的塑性犁化。相比之下，侧表面的温度低300-400°C，磨损过程具有不同的性质。
Evidence is presented to show that hard inclusions in iron-base alloys degrade machinability by reducing cutting tool life. Machining experiments have been carried out on Fe-C-Silica and Fe-C-Alumina powder metal compacts containing varying amounts of abrasive. In addition, two stainless steels have been compared. One of these was titanium stabilized hence containing hard TiC particles; the other was unstabilized and free of such particles. In all these experiments the tool wear rate increased with volume fraction of hard inclusions. Abrasive wear mechanisms have been identified using detailed metallography. When machining with high-speed steels, rake face wear by abrasion occurs by a plastic plowing process and this is enhanced if the tool is thermally weakened. When machining with cemented carbide tools the results indicate that the temperatures in the crater region are high enough for the same plastic plowing of tool material to occur. By contrast, temperatures at the flank face are 300–400°C lower and the wear processes are of a different nature.