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Study on Numerical Simulation and Deforming Microstructure of H65 Brass during Continuous Extrusion

Author: JiangHaiBo
Tutor: YaoXiangJun
School: Dalian Jiaotong University
Course: Materials Processing Engineering
Keywords: Continuous extrusion H65brass Deforming microstructure Numerical simulation
CLC: TG376
Type: Master's thesis
Year: 2010
Downloads: 136
Quote: 0
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Abstract


As a new plastic processing technology, the continuous extrusion forming technics compared to the traditional production process has more advantages such as high productivity, low energy-consuming, good quality of product and so on, especially adaptable for the products with large dimension, high intensity and extra requirement of length. Because of its superiority over the traditional extusion technics, so it is widely used in the production.Copper alloy with high mechanical properties and wear resistance, high thermal conductivity and electrical conductivity. In modern industrial production, with a very wide range of applications. The traditional processing technology of copper alloy with high production costs, high energy and other shortcomings.The experiment combined with continuous extrusion technology for the practice of continuous extrusion of brass and test experience,and applied TLJ250 continuous extrusion machine to do the experiment of H65 brass continuous extrusion. In the continuous extrusion forming horizontal sampling area, and this regional flow pattern, microstructure and composition distribution analysis.Experimental results show that: H65 brass in continuous extrusion process, in the gauge block on the side, due to the uneven flow velocity billet and massive shear deformation, resulting in less than 1mm in here to generate a hierarchical area, and there small grains. After entering the chamber, because of edge effects by the cavity wall, the flow rate of blank uneven, showing a distinct layered flow. Center of the apparent flow lines, and there is recrystallization texture. In sizing band, in addition to small grains can be seen, it also has a zinc content of 20% of the other phases exist.By applying Shimadzu universal testing machine on H65 brass billets, extruded products and water products, air-cooled mechanical tensile test, comparative analysis of the mechanical properties of extruded products after the extrusion process as work hardening, so that strength was improved, plastic, little change.The text combined with the real brass H65 Continuous extrusion parameters, to establish continuous extrusion finite element models based on MSC.MARC to explore the application of elastic-plastic finite element software used in continuous extrusion plastic deformation finite element analysis. In the extrusion process the temperature, velocity and stress and strain fields were analyzed .

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Metal pressure processing > Extrusion > Extrusion process
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