鈣處理H13鋼中夾雜物的轉變

王昊; 李晶; 史成斌; 于文濤

doi:10.13374/j.issn2095-9389.2018.s1.002

鈣處理H13鋼中夾雜物的轉變

doi: 10.13374/j.issn2095-9389.2018.s1.002

王昊¹,
李晶^1, ,,
史成斌¹,
于文濤²

1. 北京科技大學鋼鐵冶金新技術國家重點實驗室;
2. 國家電投集團(北京)特種設備材料有限公司

基金項目:

國家自然科學基金資助項目 (51374022)

詳細信息

通訊作者:
李晶, E-mail:lijing@ustb.edu.cn

中圖分類號: TG142.1
計量
- 文章訪問數: 12
- HTML全文瀏覽量: 3
- PDF下載量: 0
- 被引次數: 0
出版歷程
- 收稿日期: 2018-02-25
- 網絡出版日期: 2023-07-18

Evolution of inclusions in calcium-treated H13 die steel

1. State Key Laboratory of Advanced Metallurgy,University of Science and Technology Beijing;
2. State Power Investment Corporation (Beijing)Special Equipmentand Materials Co.Ltd.

摘要

摘要: 利用真空感應爐和掃描電鏡等設備, 實驗研究了鈣處理對H13模具鋼中夾雜物的影響, 并對鋼中夾雜物的轉變進行了熱力學計算, 討論了鈣處理對夾雜物成分和結構的影響.結果表明:鈣處理H13鋼后, 夾雜物尺寸減小, 圓形度提高, 夾雜物面積比降低;夾雜物由鈣處理前的Si O₂-Al₂O₃系夾雜物轉變為Ca O-Si O₂-Al₂O₃- (MgO) 系夾雜物, 鋼中Ca質量分數達到12×10^-6時, 夾雜物完全處于Ca O-Si O₂-Al₂O₃- (MgO) 相圖的1400℃低熔點區以內;鋼中高的T.O含量使Ca S不會在鈣處理后形成, 鋼中Ca/T.O的質量分數比達到0.3時, 復合夾雜物中的Al₂O₃將會完全消除; (Mn, Cr) S夾雜依附氧化物夾雜析出, Mn、Cr和S的偏析程度決定了復合氧硫化物夾雜的形貌.
- 鈣處理 /
- 夾雜物 /
- 熱力學計算 /
- 硫化物
Abstract: The laboratory experiments of inclusions in H13 die steel modified by Ca treatment were employed in a vacuum induction furnace and the inclusions were analyzed using a scanning electron microscope equipped with an energy dispersive spectrometer in the present study.The evolution of inclusions in H13 steel was analyzed based on thermodynamic calculation.And the component and structure of inclusions in H13 steel after Ca treatment were investigated.The results show that the particle size is modified to tiny and the roundness increases after calcium treatment, the ratio of the sum of cross sectional area of all the inclusions to the total area of the observed view fields decreases.The inclusions change from Si O₂-Al₂O₃to Ca O-Si O₂-Al₂O₃- (MgO) , and all the inclusions are in the1400℃low melting temperature region of the Ca O-Si O₂-Al₂O₃- (MgO) ternary phase diagram at the calcium mass content of 12×10^-6.Ca S is unable to form after Ca treatment due to the high T.O content of current steel.The Al₂O₃in complex inclusions would be totally eliminated as the mass ratio of Ca/T.O reached 0.3.The (Mn, Cr) S precipitated on oxide inclusions is detected, and the morphology of complex inclusions is depended on the degree of segregation of Mn, Cr and S.
- calcium treatment /
- inclusions /
- thermodynamic calculation /
- sulfide

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參考文獻(21)

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