Intelligent Testing and Analysis of Dissimilar Steel Welds for Industrial Throttle Flowmeter

The throttling flowmeter used in utility boilers has been as a measuring instrument for long time. However, its safety performance, such welding, lacks enough attention. manufacturing welds of the are welded with austenitic stainless steel and pearlitic heat-resistant steel. Cracks other defects generally found inspection detection flowmeters service, which have serious potential accidents. To find out relationship between weldingdissimilar steels defects, microhardness indentation method was to measure residual stress welding. Combined self-developed calculation software microscopic distribution, we difference color area surrounding quickly strain collected by microscope using computer image recognition algorithm, greatly improved accuracy speed test. results show that at weld dissimilar is relatively large, mechanical property test unqualified. microindentation analysis based on quickly, intuitively, accurately reveal direct combination welding materials generation cracks defects.