论文部分内容阅读
汽车发动机某些重要零件的工作温度和温度分布,对其设计和失效分析是至关重要的。然而,对象喷油嘴针阀、气门等一些零件的温度及其分布,用目前的一些技术(如热电偶、光学高温计、温敏涂料、硬度变化测定等方法)均无法或无法准确地测定。这一问题在七十年代由美国首先采用氪化技术成功地解决了。上海材料所也研制成氪化装置及测试设备。用这种测定技术所能达到的最高温度和精度分别为1000℃和±5℃(美国相应为1093.5℃和±6.5℃)。现将研究情况介绍如下。
The working temperature and temperature distribution of some important parts of a car engine are crucial for its design and failure analysis. However, the temperature and its distribution of some parts such as needle valve and valve of the target nozzle can not be measured accurately or accurately by some current technologies (such as thermocouple, optical pyrometer, temperature-sensitive paint, and measurement of hardness change) . This problem was successfully solved by the United States first using kryptonization technology in the 1970s. Shanghai Materials Institute has also developed a kryptonization device and test equipment. The highest temperatures and accuracies that can be achieved with this assay are 1000 ° C and ± 5 ° C, respectively (1093.5 ° C and ± 6.5 ° C for the United States). The research is introduced below.