This article discusses the development and optimization of the production process for Ф0.05mm ultra-fine stainless steel microwires, integrating metallurgy, mold manufacturing, chemical processes, and testing. Experimental methods including metallographic analysis, energy spectrum testing, and mechanical property testing were employed to study product characteristics at different production stages
Development and optimization of Ф0.05mm ultra-fine stainless steel microwire production process
The production of stainless steel ultra-fine microwires is a new process that integrates metallurgy, mold manufacturing, chemical processes, testing and other technologies. It is an in-depth extension of the ordinary steel wire production process. This article takes the production process of a single drawn ultra-fine
stainless steel microwire as the research object, starting from the analysis of the drawing performance at different production process stages, combined with
metallographic analysis, energy spectrum testing, tensile mechanical property testing, SEM microstructure observation, and XRD A variety of experimental research methods
such as physical phase analysis were used to specifically study the differences in product characteristics in each production stage and their impact on the
drawing performance.
During the drawing process of microwires, large uneven deformation causes metal lattice distortion and the phenomenon of grain fragmentation is very
serious. As the drawing process proceeds, the grains are elongated into fibers along the drawing direction and filaments appear. Texture phenomenon, the macroscopic
manifestation is that as the diameter of microwires becomes smaller and smaller, the tensile strength of microwires without annealing is greatly enhanced due to the fine
grain strengthening, phase transformation strengthening and work hardening effects after drawing and diameter reduction, and the elongation The rate changes little. Qualitative
observation shows that as the deformation increases, the ultrafine austenitic stainless steel microwires exhibit increasingly stronger magnetism, and the magnetism
disappears after annealing.
Through theoretical analysis and a large number of direct actual productions conducted during this experiment, it was found that the wire breakage rate and mold
loss are significantly different when drawing the same specifications of microwires before and after annealing; the wire breakage phenomenon is most likely to occur at
the beginning of drawing. ; When drawing micro wires with the same process conditions and the same specifications, as the drawing speed increases, the wire breakage
rate becomes higher and higher. The die consumption during high-speed drawing is less than the die consumption during low-speed drawing; the mold specifications affect
the drawing. The most critical factor for smooth progress, the size of the mold introduction angle has a great impact on the drawing wire breakage rate. This project
compares two different production process routes of ⌀0.05mm ultra-fine stainless steel microwires, and formulates a set of process specifications suitable for the actual
production conditions of the enterprise.
The optimized parameter settings, lubrication conditions, annealing parameters, mold selection, mold matching specifications, etc. of the
stretching machine can provide theoretical and practical guidance for future ultra-fine stainless steel microwire production.