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Phase analysis of titanium in steel has been carried out on thirty samples with different Ti-content from 0.036%- 0.204%.The various heat treatments for the samples are to anneal at 1050-1200 C for a while.followed by cooling at a rate of 1,10.20 ℃/s.respectively.It is achieved to separate and determine fine particle TiC.coarse particle TiC,Ti_2CS and TiN extracted from steel by controlling the oxidation potential and acidity of solutions.The results of quantitative analysis of the individual phase show that 0.09%— 0.13%Ti-content is enough to eliminate free nitrogen and transform MnS into Ti_2CS in steel effectively.In the case of0.06%-0.10%Ti-content combined with annealing at 1050 C and quick cooling at 20 ℃/s,a proper amount of fine particle TiC can be precipitated and the rate of TiC(fine)/TiC(total)is high,which are beneficial to increase strength and toughness of steel.More Ti-content or cooling slowly will precipitate more coarse particle TiC which decreaces toughness severely.The proposed methods for quantitative phase analysis of titanium in steel are given in detail.
Phase analysis of titanium in steel has been carried out on thirty samples with different Ti-content from 0.036% to 0.204%. The various heat treatments for the samples are to anneal at 1050-1200 C for a while. of 1, 10.20 ° C / s.respectively. It is achieved to separate and determine the fine particle TiC.coarse particle TiC, Ti_2CS and TiN extracted from steel by controlling the oxidation potential and acidity of solutions. The results of quantitative analysis of the individual phase show that 0.09% - 0.13% Ti-content is enough to eliminate free nitrogen and transform MnS into Ti_2CS in steel in the case of 0.06% -0.10% Ti-content combined with annealing at 1050 C and quick cooling at 20 ° C / s, a proper amount of fine particle TiC can be precipitated and the rate of TiC (fine) / TiC (total) is high, which are beneficial to increase strength and toughness of steel. coarse particle TiC which decreaces toughness sev erely.The proposed methods for quantitative phase analysis of titanium in steel are given in detail.