HD合金钢静态再结晶行为及组织演变研究
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摘要
以HD合金钢为研究对象,利用Gleeble-1500D热模拟机模拟得到应变速率为0. 1,0. 5 s~(-1),变形程度为20%,30%,50%以及变形温度950,1 000,1 150℃的应力-应变曲线,对HD合金钢静态再结晶行为及组织演变进行了研究.实验结果表明:在同一变形温度下,变形抗力与变形程度成正比,变形程度一定,变形抗力与变形温度成反比.变形温度和变形程度对HD合金钢的再结晶行为影响较大,即变形温度高、变形程度大材料会发生完全再结晶.通过金相观察发生完全再结晶的试样,组织晶粒较初始晶粒明显变小.
With HD alloy steel as the research object,Gleeble-1500 D thermal simulator was used to obtain the stress-strain curve under the simulating condition that strain rate is 0. 1 s~(-1),0. 5 s~(-1),deformation degree is 20%,30%,50%,and the deformation temperature 950,1 000,1 150 ℃,respectively. The static recrystallization behavior and microstructural evolution of HD alloy steel were studied. The experimental results show that at the same deformation temperature,the deformation resistance is proportional to the deformation degree; while the deformation degree is certain,the deformation resistance is inversely proportional to the deformation temperature. The effect of deformation temperature and degree on the recrystallization behavior of HD alloy steel is significant. The microstructure grains of samples with complete recrystallization were obviously smaller than the initial grains.
With HD alloy steel as the research object,Gleeble-1500 D thermal simulator was used to obtain the stress-strain curve under the simulating condition that strain rate is 0. 1 s~(-1),0. 5 s~(-1),deformation degree is 20%,30%,50%,and the deformation temperature 950,1 000,1 150 ℃,respectively. The static recrystallization behavior and microstructural evolution of HD alloy steel were studied. The experimental results show that at the same deformation temperature,the deformation resistance is proportional to the deformation degree; while the deformation degree is certain,the deformation resistance is inversely proportional to the deformation temperature. The effect of deformation temperature and degree on the recrystallization behavior of HD alloy steel is significant. The microstructure grains of samples with complete recrystallization were obviously smaller than the initial grains.
引文
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[3]陈爱民.水利发电厂继电保护技术的现状与发展趋势[J].电子技术与软件工程,1918,(24):219.
[4]陈肇翼,刘靖,任学平. 13Cr超级马氏体不锈钢的热变形行为研究[J].热加工工艺,2019.(6):51-54.
[5]刘斌,王志刚,王孟梁.冷却工艺对高强度热轧双相钢组织与力学性能的影响[J].热处理工艺,2017,(17):174-176.
[6]强强,麻永林,王文君.热处理工艺对27SiMn钢组织及力学性能的影响[J].内蒙古科技大学学报,2014,(2):136-139+148.
[7]杨秀霞,李俊,孙格平.变形量和变形温度对Cr5冷轧辊再结晶现象的影响[J].大型铸锻件,2018,(5):14-15+18.
[8]于永梅,胡亮明,彭加利.热变形对Fe-3%Si钢软化率的影响及其组织表征[J].热加工工艺,2018,(10):34-38.
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[10]蔺永诚,陈明松,钟掘. 42CrMo钢形变奥氏体的静态再结晶[J].中南大学学报(自然科学版),2009,(2):411-416.
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