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我厂热处理所用均为电炉,因此使用温度只能局限于950℃,而且箱形电炉的尺寸也很有限,最大的不过是H-75;所以在最初,我们Ц-35马福罐的渗铝工作就请上海机修总厂协作进行,但是对于大工件的固体渗铝却遭到了一系列的失败。为此,我们自己就进行了比较系统的固体渗铝试验,并在试验终了之后,在机修总厂的帮助下进行了规模较大的渗铝工作,对球墨铸铁试样和球墨铸铁坩埚也进行了一些生产性的试验。由于球墨铸铁的渗铝速度不同于低碳钢,所以在大件渗铝之前,我们对球墨铸铁进行了时间、温度、渗铝层深度之间的测定,其结果列于图1。由图1可
I plant are used for heat treatment furnace, so the use of temperature can only be limited to 950 ℃, and the size of the box-shaped furnace is also very limited, the biggest is H-75; So in the beginning, Work on the Shanghai Machinery Plant, please collaborate, but for large parts of the solid aluminizing has been a series of failures. To this end, we conducted a systematic solid aluminizing test ourselves and, after the end of the test, carried out a large-scale aluminizing work with the help of a machine shop, as well as tests on ductile iron samples and ductile iron crucibles Some productive experiments. As the ductile iron aluminizing speed is different from the low-carbon steel, so in the large aluminized before, we conducted a ductile iron time, temperature, aluminized layer depth between the determination of the results shown in Figure 1. From Figure 1 can be