Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel
Large eutectic carbides presenting in the matrix deteriorate the mechanical properties of high carbon martensitic stainless steel. In the present work, nitrogen-alloyed martensitic stainless steel with different C/N ratios were designed by partial substitution of C by N of 9Cr18Mo, and their microst...
| Main Authors: | , , , , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-12-01
|
| Series: | Materials & Design |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127523009127 |
| _version_ | 1797391923430817792 |
|---|---|
| author | Rui Wang Fenghao Li Zhiqiang Yu Yan Kang Meng Li Yong Hu Haoran An Jing Fan Fang Miao Yuhong Zhao Jürgen Eckert Zhijie Yan |
| author_facet | Rui Wang Fenghao Li Zhiqiang Yu Yan Kang Meng Li Yong Hu Haoran An Jing Fan Fang Miao Yuhong Zhao Jürgen Eckert Zhijie Yan |
| author_sort | Rui Wang |
| collection | DOAJ |
| description | Large eutectic carbides presenting in the matrix deteriorate the mechanical properties of high carbon martensitic stainless steel. In the present work, nitrogen-alloyed martensitic stainless steel with different C/N ratios were designed by partial substitution of C by N of 9Cr18Mo, and their microstructure and mechanical properties were investigated. The results show that, with increasing the content of N up to 0.15 wt% in the experimental steel, the quantity and the size of eutectic carbides decrease； and the net-work eutectic carbides are gradually eliminated. The microstructure of all the steels is composed of lath martensite, twin martensite and M23C6 carbides. With partial substitution of C by N, the morphology of martensite blocks evolves from a lath shape to a blocky one, the quantity of twin martensite increases, and the nano-scaled Cr2N nitrides precipitate in the martensite matrix. The steel containing 0.15 wt% N exhibits the hardness of 60.5 HRC, a fracture strength of 1900 MPa and an elongation rate of 1.6 % due to hot rolling and heat treatment, which is attributed to the refinement of carbides and grains, solid solution of C and N, as well as the dense dislocation. |
| first_indexed | 2024-03-08T23:39:43Z |
| format | Article |
| id | doaj.art-792ac54a92c3424b98c39e9c0cc0ca7c |
| institution | Directory Open Access Journal |
| issn | 0264-1275 |
| language | English |
| last_indexed | 2024-03-08T23:39:43Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj.art-792ac54a92c3424b98c39e9c0cc0ca7c2023-12-14T05:20:29ZengElsevierMaterials & Design0264-12752023-12-01236112497Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steelRui Wang0Fenghao Li1Zhiqiang Yu2Yan Kang3Meng Li4Yong Hu5Haoran An6Jing Fan7Fang Miao8Yuhong Zhao9Jürgen Eckert10Zhijie Yan11School of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR ChinaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR ChinaErich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstraße 12, A-8700, Leoben, Austria; Department of Materials Science, Chair of Materials Physics, Montanuniversitä€at Leoben, Jahnstraße 12, A-8700, Leoben, AustriaSchool of Materials Science and Engineering, North University of China, Taiyuan 030051, PR China; Shanxi Key Laboratory of Advanced Metal Materials for Special Environments, North University of China, Taiyuan 030051, PR China; Corresponding author.Large eutectic carbides presenting in the matrix deteriorate the mechanical properties of high carbon martensitic stainless steel. In the present work, nitrogen-alloyed martensitic stainless steel with different C/N ratios were designed by partial substitution of C by N of 9Cr18Mo, and their microstructure and mechanical properties were investigated. The results show that, with increasing the content of N up to 0.15 wt% in the experimental steel, the quantity and the size of eutectic carbides decrease； and the net-work eutectic carbides are gradually eliminated. The microstructure of all the steels is composed of lath martensite, twin martensite and M23C6 carbides. With partial substitution of C by N, the morphology of martensite blocks evolves from a lath shape to a blocky one, the quantity of twin martensite increases, and the nano-scaled Cr2N nitrides precipitate in the martensite matrix. The steel containing 0.15 wt% N exhibits the hardness of 60.5 HRC, a fracture strength of 1900 MPa and an elongation rate of 1.6 % due to hot rolling and heat treatment, which is attributed to the refinement of carbides and grains, solid solution of C and N, as well as the dense dislocation.http://www.sciencedirect.com/science/article/pii/S0264127523009127Martensitic stainless steelNitrogen alloyingCarbidesMicrostructureMechanical properties |
| spellingShingle | Rui Wang Fenghao Li Zhiqiang Yu Yan Kang Meng Li Yong Hu Haoran An Jing Fan Fang Miao Yuhong Zhao Jürgen Eckert Zhijie Yan Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel Materials & Design Martensitic stainless steel Nitrogen alloying Carbides Microstructure Mechanical properties |
| title | Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel |
| title_full | Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel |
| title_fullStr | Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel |
| title_full_unstemmed | Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel |
| title_short | Influences of partial substitution of C by N on the microstructure and mechanical properties of 9Cr18Mo martensitic stainless steel |
| title_sort | influences of partial substitution of c by n on the microstructure and mechanical properties of 9cr18mo martensitic stainless steel |
| topic | Martensitic stainless steel Nitrogen alloying Carbides Microstructure Mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S0264127523009127 |
| work_keys_str_mv | AT ruiwang influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT fenghaoli influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT zhiqiangyu influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT yankang influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT mengli influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT yonghu influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT haoranan influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT jingfan influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT fangmiao influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT yuhongzhao influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT jurgeneckert influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel AT zhijieyan influencesofpartialsubstitutionofcbynonthemicrostructureandmechanicalpropertiesof9cr18momartensiticstainlesssteel |