{"title":"钙处理对铝渗钢夹杂物和抗拉强度的影响","authors":"Liang Zhu, Guojun Chen, Ying Ren, Lifeng Zhang","doi":"10.1002/srin.202401043","DOIUrl":null,"url":null,"abstract":"<p>\nThe effect of calcium treatment on inclusions and tensile strength of Al-killed steels is studied through experiments and thermodynamic calculations. The addition of calcium in steel first modifies Al<sub>2</sub>O<sub>3</sub> inclusions to liquid CaO–Al<sub>2</sub>O<sub>3</sub>. The excessive calcium addition results in the formation of CaS inclusions. The solidus and liquidus of inclusions in steel first decrease and then increase with the increase of total calcium (T.Ca) content in steel, which reach the minimum value when the T.Ca content in steel is 22 ppm. With the increase of T.Ca content in steel from 0 to 70 ppm, the evolution route of inclusions is Al<sub>2</sub>O<sub>3</sub> → CaMg<sub>2</sub>Al<sub>16</sub>O<sub>27</sub> → CaAl<sub>4</sub>O<sub>7</sub> → liquid CaO–Al<sub>2</sub>O<sub>3</sub> → CaO–CaS. Contents of Al<sub>2</sub>O<sub>3</sub> and MgO slightly decrease with the lower temperature. The CaO gradually changes to CaS during solidification and cooling processes. The tensile strength of steel samples decreases from 809 to 737 N·mm<sup>−2</sup> with the increase of T.Ca content in steel from 13 to 22 ppm. With a higher T.Ca content in steel, the tensile strength of steel samples increases to 774 ppm. The formation of liquid CaO–Al<sub>2</sub>O<sub>3</sub> inclusions in steel lowered the tensile strength of steel, which should be avoided during the calcium treatment process.</p>","PeriodicalId":21929,"journal":{"name":"steel research international","volume":"96 10","pages":"295-301"},"PeriodicalIF":2.5000,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of Calcium Treatment on Inclusions and Tensile Strength of Al-Killed Steels\",\"authors\":\"Liang Zhu, Guojun Chen, Ying Ren, Lifeng Zhang\",\"doi\":\"10.1002/srin.202401043\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>\\nThe effect of calcium treatment on inclusions and tensile strength of Al-killed steels is studied through experiments and thermodynamic calculations. The addition of calcium in steel first modifies Al<sub>2</sub>O<sub>3</sub> inclusions to liquid CaO–Al<sub>2</sub>O<sub>3</sub>. The excessive calcium addition results in the formation of CaS inclusions. The solidus and liquidus of inclusions in steel first decrease and then increase with the increase of total calcium (T.Ca) content in steel, which reach the minimum value when the T.Ca content in steel is 22 ppm. With the increase of T.Ca content in steel from 0 to 70 ppm, the evolution route of inclusions is Al<sub>2</sub>O<sub>3</sub> → CaMg<sub>2</sub>Al<sub>16</sub>O<sub>27</sub> → CaAl<sub>4</sub>O<sub>7</sub> → liquid CaO–Al<sub>2</sub>O<sub>3</sub> → CaO–CaS. Contents of Al<sub>2</sub>O<sub>3</sub> and MgO slightly decrease with the lower temperature. The CaO gradually changes to CaS during solidification and cooling processes. The tensile strength of steel samples decreases from 809 to 737 N·mm<sup>−2</sup> with the increase of T.Ca content in steel from 13 to 22 ppm. With a higher T.Ca content in steel, the tensile strength of steel samples increases to 774 ppm. The formation of liquid CaO–Al<sub>2</sub>O<sub>3</sub> inclusions in steel lowered the tensile strength of steel, which should be avoided during the calcium treatment process.</p>\",\"PeriodicalId\":21929,\"journal\":{\"name\":\"steel research international\",\"volume\":\"96 10\",\"pages\":\"295-301\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-03-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"steel research international\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/srin.202401043\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"steel research international","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/srin.202401043","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Effect of Calcium Treatment on Inclusions and Tensile Strength of Al-Killed Steels
The effect of calcium treatment on inclusions and tensile strength of Al-killed steels is studied through experiments and thermodynamic calculations. The addition of calcium in steel first modifies Al2O3 inclusions to liquid CaO–Al2O3. The excessive calcium addition results in the formation of CaS inclusions. The solidus and liquidus of inclusions in steel first decrease and then increase with the increase of total calcium (T.Ca) content in steel, which reach the minimum value when the T.Ca content in steel is 22 ppm. With the increase of T.Ca content in steel from 0 to 70 ppm, the evolution route of inclusions is Al2O3 → CaMg2Al16O27 → CaAl4O7 → liquid CaO–Al2O3 → CaO–CaS. Contents of Al2O3 and MgO slightly decrease with the lower temperature. The CaO gradually changes to CaS during solidification and cooling processes. The tensile strength of steel samples decreases from 809 to 737 N·mm−2 with the increase of T.Ca content in steel from 13 to 22 ppm. With a higher T.Ca content in steel, the tensile strength of steel samples increases to 774 ppm. The formation of liquid CaO–Al2O3 inclusions in steel lowered the tensile strength of steel, which should be avoided during the calcium treatment process.
期刊介绍：
steel research international is a journal providing a forum for the publication of high-quality manuscripts in areas ranging from process metallurgy and metal forming to materials engineering as well as process control and testing. The emphasis is on steel and on materials involved in steelmaking and the processing of steel, such as refractories and slags.
steel research international welcomes manuscripts describing basic scientific research as well as industrial research. The journal received a further increased, record-high Impact Factor of 1.522 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)).
The journal was formerly well known as "Archiv für das Eisenhüttenwesen" and "steel research"; with effect from January 1, 2006, the former "Scandinavian Journal of Metallurgy" merged with Steel Research International.
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