论文部分内容阅读
本文主要研究了C和Si的含量对3J22合金轴尖的斑点的影响,认为含C量过高是影响轴尖斑点的一个因素。当含0．18％C左右时,致使材料在光洁度12级下暴露出凹坑埔加,这种凹坑也就是在62．5倍显微镜下所观察到的一种斑点,这种斑点不是由于碳化物增多的缘故。在合金中若是矽酸盐夹杂物增多,同样会使轴尖斑点增多。故在3J22合金的生产中,要严格控制C和Si的含量,认为C含量在0．12％左右是适宜的；C含量过低,又会使硬度下降；矽酸盐夹杂物应尽量避免。文中还提出：用金相评级法所确定的钢中夹杂物之级别,和轴尖斑点的多少完全没有对应的关系。本文还讨论了轴尖斑点究竟对仪表有多大影响的问题,认为轴尖工作部分带有少量凹坑的斑点,不影响其使用性能。
In this paper, the effects of C and Si content on the speckle of 3J22 alloy shaft were studied. It is considered that the high content of C is a factor that affects the tip speckle. When 0.18% C is contained, the material is exposed at a finish of 12 degrees to a pit of puga, a spot observed under a 62.5x microscope, which is not due to Carbide increased reason. If the silicate inclusions in the alloy increased, the same will increase the axial spot. Therefore, in the production of 3J22 alloy, the content of C and Si should be strictly controlled, and the content of C is about 0.12%, which is appropriate; if the content of C is too low, the hardness will decrease; and the silicate inclusions should be avoided as much as possible. The article also proposed: metallurgical grade method to determine the level of inclusions in steel, and the number of axial tip completely no corresponding relationship. This article also discusses the axial tip speckle how much impact on the instrument, that the working part of the shaft with a small amount of pit spots, does not affect its performance.