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Research and Manufacturing and Application of the Multitype-anvil in Slab Sizing Press

Author: WangGuangZuo
Tutor: JiangGuangBiao；LinTao
School: Shanghai Jiaotong University
Course: Materials Processing Engineering
Keywords: Fixed-width presses module Surfacing Thermal fatigue ANSYS
CLC: TG455
Type: Master's thesis
Year: 2009
Downloads: 45
Quote: 0
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Abstract

Large lateral pressure fixed-width (Sizing Press, SP) is a line width adjustment, it can increase the level of integration of the continuous casting and rolling. Fixed-width presses the site conditions are very poor, leading to the fixed-width presses module face often in a large area of ??the crack, and also bring major hidden rolling production seriously affect their life. Due to the high price of domestic steel companies imported module, domestic module finite useful life. This paper along the ideas of imitation and independent research and development, the use of laboratory simulation test, took the lead in the domestic metallurgical enterprises in the computer simulation and field trials in contrast to the combination, try using the method of surfacing, manufacture composite fixed-width pressure The machine module, in order to increase its service life, and reduce the equipment cost. Imitation surfacing electrode with an imitation of the iron-based stainless steel electrode surfacing in a fixed-width presses module face. By its mechanical properties, high-temperature hardness and surfacing layer impact the performance of the test as well as the microstructure of the surfacing layer analysis shows increased after surfacing the side presses module strength, high-temperature hardness and impact resistance; surfacing The layer organization sorbite, proeutectoid ferrite and spheroidal carbides; fusion zone microstructure is tempered martensite and a small amount of sorbite. In this paper, an independent research and Ni-Cr-Mo-W nickel-based electrode surfacing in a fixed-width presses module face in independent research and development surfacing electrode. By sampling, the completion of the mechanical properties of experimental, high-temperature hardness test, metallographic and surfacing layer impact performance experiments. Experimental results show that the distribution module within the nickel-based surfacing layer flaky γ 'phase, which is the main reinforcement of the high temperature alloy phase; dispersed carbide can improve the hardness of the surfacing layer. Γ 'phase of existence avoided under high temperature nickel-based hardfacing layer hardness carbide gathering grew sharp decline; surfacing layer has a \in the base metal fracture shock value. The hot and cold fatigue experiment developed by the Institute of Baoshan Iron and Steel Institute of device independent induction heating metal material thermal fatigue test device, the two surfacing material resistance to thermal fatigue performance test. Macro surfacing material test bars crack fracture morphology observed crack growth along the grain growth, supplemented by transgranular, is typical of thermal fatigue cracks; inclusions observed by scanning electron microscopy of two types of material to analyze the impact of inclusions on the the two surfacing of hot and cold metal fatigue performance assessment of the level of the two surfacing metal thermal fatigue crack; Uddeholm standard map. Computer simulation using ANSYS analysis software, confirmed the thermal fatigue experiment the accuracy of the conclusions. On-site industrial applications, through domestic module import module, two experimental modules to produce 30,000 tons, 150,000 tons, 200,000 tons over the amount of steel after the module face morphology observed after comparison confirmed that the application of the two Experimental surfacing electrode can effectively improve the life of the fixed-width presses module. The same time, the import module, its relatively low price to reduce the cost of spare parts of the module.

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CLC: > Industrial Technology > Metallurgy and Metal Craft > Welding, metal cutting and metal bonding > Welding process > Surfacing and repair welding
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