摘要
针对百万千瓦核电机组用铸钢GX4CrNi13-4材料进行车削试验,主要从表面粗糙度和加工变质层两方面分析其加工表面质量。采用正交试验方法,选取切削速度、进给量、切削深度和切削宽度,并考量了刀具刀尖圆弧半径和后刀面磨损等因素,以表面粗糙度(Ra和Rz值)为试验目标,研究了加工表面粗糙度的变化。在最优切削参数下Rz值可达0.792μm。最后,选取加工表面加工硬化、金相组织变化和残余应力特性三项指标研究了铸钢加工表面变质层的变化规律。
Abstract： In order to obtain the optimized cutting parameters and tool parameters which meets the need of the surface quality, this paper studied the turning process of materials GX4CrNil3-4 of one million kilowatts nuclear power unit. Or- tbogonal test and single factor test methods are used. Choose cutting speed, feed rate, cutting depth and cutting width, cutting tool nose radius and flank wear as the changing parameters, with the surface roughness （Ra and Rz） as the test tar- get, surface roughness of the feed direction are studied. The Rz value under the optimal cutting parameters is 0. 792p^m. In addition, machining surface hardening, microstructure changes and residual stress are selected as three main indicators of cast steel turning surface metamorphic layer.
出处
《工具技术》
2013年第7期9-12,共4页
Tool Engineering
关键词
铸钢
车削表面质量
表面粗糙度
表面变质层
nuclear power cast steel
turning surface integrity
surface roughness
surface deterioration
