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ESRC high resistance of titanium slag to protect the design and the burning of titanium steel

Author: TianYu
Tutor: JiangYunFeiï¼›YuBo
School: Research Institute of Mechanical
Course: Materials Processing Engineering
Keywords: ESRC Low-alloy steel containing titanium Coexistence theory Of the activity
CLC: TF142
Type: Master's thesis
Year: 2008
Downloads: 89
Quote: 0
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Abstract


Prepared using electroslag casting low alloy steel containing titanium , excellent mechanical properties can be obtained , but the steel titanium chemically active , prone to oxidation loss . This paper analyzes the existing four yuan slag (77% wt CaF 2 -10% wt Al 2 O 3 -9% wt MgO- 4% wt TiO 2 ) cast low-alloy steel containing titanium titanium oxidation burning method , proposed the idea of ??burning titanium inhibition of slag is designed to give high resistance of titanium slag component and its protection ratio of : 13.5% wt CaF 2 -45% wtAl 2 O 3 -27% wt CaO-7% wt MgO-7.5% wt TiO 2 . To coexistence theory, protection against high resistance of titanium slag component modeling and solving activity , activity of each component : CaF 2 , 0.1; Al 2 O 3 , 0.042; CaO, 0.177; MgO, 0.052; TiO 2 , 0.02, calculated according to the value of the activity to protect high-resistance titanium slag optical basicity at 0.78 , and press initial molar concentration calculated slag optical basicity values ??with high resistance to alkaline titanium slag slag protection . The design of the high resistance of titanium slag and liquid steel protective titanium reaction thermodynamics , kinetics calculation and analysis, the results showed that: titanium slag in each reaction , TiO 2 reacts with titanium Ti 3 O 5 free energy minimum , most likely reaction . In TiO 2 and titanium reactants and products in , Ti 3 O 5 minimum rate of diffusion of the slow oxidation of titanium to reduce the burning of titanium favorable . Titanium and TiO 2 of reactions at the electrode tip and the molten slag pool droplet through two stages. High resistance low alloy cast titanium protective slag containing titanium titanium steel specimens were significantly higher than using the quaternion slag specimens obtained titanium content , indicating that the titanium slag has good security role . Protection with high resistance of titanium slag containing titanium steel casting low alloy specimens , process parameters , and slag stable condition , casting process is stable, lower power consumption , specimen good shape . Protection of high resistance of titanium slag casting titanium content of 0.9 % of low- alloy steel, titanium , titanium specimen in uniform distribution , the maximum value and the minimum value is 0.03 %, the average amount of 0.11% of titanium burning .

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CLC: > Industrial Technology > Metallurgical Industry > Metallurgical Technology > Remelting > ESR Process
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