Da-shan Sui , Hai-ming Zhang , Hong-yang Zhu , Zhe Zhu , Zhen-shan Cui
{"title":"工艺参数对316LN钢热轧mm级粗晶破碎细化的影响","authors":"Da-shan Sui , Hai-ming Zhang , Hong-yang Zhu , Zhe Zhu , Zhen-shan Cui","doi":"10.1016/S1006-706X(17)30080-8","DOIUrl":null,"url":null,"abstract":"<div><p>The heterogeneous mixed-grain microstructure is a common defect for the heavy forging of 316LN austenitic stainless steel. Isothermal compression experiments were performed on a Gleeble-3500 thermo-mechanical simulator to investigate the effect of process parameters on the fragment and refinement of millimeter-grade coarse grains (MCGs) during hot cogging. The experimental results indicate that the stress of MCG specimens is much larger than that of fine grain (FG) ones at 1150 °C, while the stress difference between MCG and FG samples became smaller at 1200 °C. Moreover, the MCGs can be well fragmented and refined under the condition of temperature of 1200 °C, strain rate of 0.01 s<sup>−1</sup>, and reduction rate of 50%. Meanwhile, numerical simulations were conducted to study the influences of temperature, strain and strain rate on microstructure evolution. The results of experiments and simulations comprehensively demonstrate that the MCG results in the increase of deformation resistance and incompatibility of deformation, and it can be fragmented and refined at 1200 °C so that the plastic deformation energy decreases remarkably with the increase of temperature from 1150 to 1200 °C.</p></div>","PeriodicalId":64470,"journal":{"name":"Journal of Iron and Steel Research(International)","volume":null,"pages":null},"PeriodicalIF":3.1000,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30080-8","citationCount":"3","resultStr":"{\"title\":\"Effects of process parameters on fragment and refinement of millimeter-grade coarse grains for 316LN steel during hot cogging\",\"authors\":\"Da-shan Sui , Hai-ming Zhang , Hong-yang Zhu , Zhe Zhu , Zhen-shan Cui\",\"doi\":\"10.1016/S1006-706X(17)30080-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The heterogeneous mixed-grain microstructure is a common defect for the heavy forging of 316LN austenitic stainless steel. Isothermal compression experiments were performed on a Gleeble-3500 thermo-mechanical simulator to investigate the effect of process parameters on the fragment and refinement of millimeter-grade coarse grains (MCGs) during hot cogging. The experimental results indicate that the stress of MCG specimens is much larger than that of fine grain (FG) ones at 1150 °C, while the stress difference between MCG and FG samples became smaller at 1200 °C. Moreover, the MCGs can be well fragmented and refined under the condition of temperature of 1200 °C, strain rate of 0.01 s<sup>−1</sup>, and reduction rate of 50%. Meanwhile, numerical simulations were conducted to study the influences of temperature, strain and strain rate on microstructure evolution. The results of experiments and simulations comprehensively demonstrate that the MCG results in the increase of deformation resistance and incompatibility of deformation, and it can be fragmented and refined at 1200 °C so that the plastic deformation energy decreases remarkably with the increase of temperature from 1150 to 1200 °C.</p></div>\",\"PeriodicalId\":64470,\"journal\":{\"name\":\"Journal of Iron and Steel Research(International)\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2017-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1006-706X(17)30080-8\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Iron and Steel Research(International)\",\"FirstCategoryId\":\"1087\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1006706X17300808\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"METALLURGY & METALLURGICAL ENGINEERING\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Iron and Steel Research(International)","FirstCategoryId":"1087","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1006706X17300808","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
Effects of process parameters on fragment and refinement of millimeter-grade coarse grains for 316LN steel during hot cogging
The heterogeneous mixed-grain microstructure is a common defect for the heavy forging of 316LN austenitic stainless steel. Isothermal compression experiments were performed on a Gleeble-3500 thermo-mechanical simulator to investigate the effect of process parameters on the fragment and refinement of millimeter-grade coarse grains (MCGs) during hot cogging. The experimental results indicate that the stress of MCG specimens is much larger than that of fine grain (FG) ones at 1150 °C, while the stress difference between MCG and FG samples became smaller at 1200 °C. Moreover, the MCGs can be well fragmented and refined under the condition of temperature of 1200 °C, strain rate of 0.01 s−1, and reduction rate of 50%. Meanwhile, numerical simulations were conducted to study the influences of temperature, strain and strain rate on microstructure evolution. The results of experiments and simulations comprehensively demonstrate that the MCG results in the increase of deformation resistance and incompatibility of deformation, and it can be fragmented and refined at 1200 °C so that the plastic deformation energy decreases remarkably with the increase of temperature from 1150 to 1200 °C.