Papers by Author: Feng Yan

Abstract: 4J29 is a typical of expansion alloy and used as sealing glass material and structure material in transistors, integrated circuit devices manufacturing industry. This article adopts heat-treatment experiments and single factor optimization method to study the relationships of recrystallization temperature, beforehand deformation and grain sizes on 4J29 alloy; then discusses the reason why the coarse grain phenomena appear and gives technological measures to improve the quality and performance of workpiece

Abstract: In producing stainless steel cold rolling strip, stripe and decorative pattern shape defects occur on the surface, and influence its quality. This paper uses the spot investigation, defects microscopic analysis and scanning electron microscopy spectrometer methods in order to give a detailed analysis about surface defects, discusses the essence of defects, causes and effects process, puts forward valuable suggestions and provides reliable data for the actual production.

Abstract: The key problems of designing rheogeniometer product are divided into two aspects: one is the method of designing the hardware and measuring the shear rate; another is how to compute the viscosity accurately by the data of the shear rate, both are necessity. Since making plans, the connection of the mechanisms, the electric elements and the software is considered comprehensively. In order to solve the key problem that the rotate speeds of turntable in the rheogeniometer make error often, a method called Precision Design is built up, which could improved the detecting precision of the rheogeniometer.