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层间残余应力对带夹层复合板组织性能影响

钢铁 2024年第1期59卷 148-156页

作者：金贺荣沈晓龙冯康康张彪宜亚丽赵丁选燕山大学先进锻压成型技术与科学教育部重点实验室河北秦皇岛066004 燕山大学河北省并联机器人与机电系统实验室河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004

利用层间真空涂覆技术在不锈钢复合板间添加充型夹层会产生层间残余应力,在后续热轧成形过程中可能受层间残余应力影响导致复合板组织与力学性能发生变化。不锈钢复合板层间残余应力由充型夹层凝固过程中层间热应力与相变应力共同作用产... 详细信息

利用层间真空涂覆技术在不锈钢复合板间添加充型夹层会产生层间残余应力,在后续热轧成形过程中可能受层间残余应力影响导致复合板组织与力学性能发生变化。不锈钢复合板层间残余应力由充型夹层凝固过程中层间热应力与相变应力共同作用产生,拟通过轧前热处理对层间残余应力进行消除,采用数值模拟与试验验证相结合的方法制定轧前热处理工艺,通过层间真空压差涂覆、轧前热处理及热轧试验制备消除与未消除层间残余应力的2种不锈钢复合板,利用金相观测、硬度测试、界面能谱扫描及拉伸、剪切等表征及性能测试试验分析层间残余应力对复合板组织性能的影响。研究结果表明,在保证基层、夹层、复层组织不变的情况下,消除层间残余应力的轧前处理工艺为加热至400℃,保温3.5h,缓慢冷却;经过轧前处理,层间残余应力消减了96.3%;相较于未消除层间残余应力的复合板,消除层间残余应力复合板轧后夹层应力显著增强,晶粒细化81.7%,同时,消除层间残余应力能够提升复合板剪切强度13.3%、拉伸强度3.9%、断后伸长率4%及夹层界面显微硬度3.5%。研究内容通过消除层间残余应力提升了带充型夹层复合板的整体性能,可为相关铸造成型构件性能的提升提供理论指导,为工艺进一步推广应用拓展了新思路。

关键词：层间残余应力轧前处理组织性能不锈钢复合板层间真空涂覆

Hardware-in-the-loop simulation for the contact dynamic process of flying objects in space

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Science China(Technological Sciences) 2016年第8期59卷 1167-1175页

作者： GAO feng QI ChenKun REN AnYe ZHAOXianChao CAO Rui SUN Qiao WANG Qian HU Yan HE Jun jin zhenlin LIU RenQiang ZHANG Yong GUO WeiZhong HU ZhenYu TANG Ping NI Bo jinG Qianfeng WANG WeiJun GAO Peng State Key Laboratory of mechanical System and Vibration School of Mechanical Engineering Shanghai Jiao Tong University Shanghai 200240 China Institute of Aerospace System engineering Shanghai Shanghai 201108 China school of mechanical engineering Yanshan University Qinhuangdao 066004 China

In the one-gravity environment on the ground, the simulation of the contact process of two flying objects in the zero-gravity environment of space has been a challenging issue since humans first explored space by flying objects. Hardware-in-the-loop （HIL） simulation is an important and effective method to test the usability, reliability, and safety of real docking mechanisms in space. There are four main issues for HIL simulation systems： Design of simulators capable of high frequency response, high motion precision, high velocity, and rapid acceleration; compensation for simulation distortion; design of a control model for the HIL simulation process; and experimental verification. Here, we propose a novel HIL simulator system with a 6-DOF 3-3 perpendicular parallel mechanism and a 3-DOF 3-PRS parallel mechanism; discover the principle of simulation distortion; present distortion compensation models for the force measurement system, dynamic response, and structural dynamics of the simulator; and provide a control model for the HIL simulation process. Two kinds of experiments were performed on the pas- sive-undamped elastic rod and the docking mechanisms to test their performances and to verify the effectiveness and usability of the HIL simulator. The HIL simulation system proposed in this paper is useful for developing space docking, berthing, refu- eling, repairing, upgrading, transporting, and rescuing technologies.

关键词： hardware-in-the-loop simulation hybrid simulation docking simulation contact dynamics parallel mechanisms simulation distortions distortions compensation

Dynamic mass variation and multiphase interaction among steel, slag, lining refractory and nonmetallic inclusions: Laboratory experiments and mathematical prediction

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International Journal of Minerals,Metallurgy and Materials 2021年第8期28卷 1298-1308页

作者： Ju-jin Wang Li-feng Zhang Gong Cheng Qiang Ren Ying Ren school of Metallurgical and Ecological engineering University of Science and Technology BeijingBeijing 100083China State Key Laboratory of Metastable Materials Science and technology Yanshan UniversityQinhuangdao 066004China school of mechanical engineering Yanshan UniversityQinhuangdao 066004China

The mass transfer among the multiphase interactions among the steel, slag, lining refractory, and nonmetallic inclusions during the refining process of a bearing steel was studied using laboratory experiments and numerical kinetic prediction. Experiments on the system with and without the slag phase were carried out to evaluate the influence of the refractory and the slag on the mass transfer. A mathematical model coupled the ion and molecule coexistence theory, coupled-reaction model, and the surface renewal theory was established to predict the dynamic mass transfer and composition transformation of the steel, the slag, and nonmetallic inclusions in the steel. During the refining process,Al_(2)O_(3) inclusions transformed into Mg O inclusions owing to the mass transfer of [Mg] at the steel/refractory interface and(Mg O) at the slag/refractory interface. Most of the aluminum involved in the transport entered the slag and a small part of the aluminum transferred to lining refractory, forming the Al_(2)O_(3) or Mg O·Al_(2)O_(3). The slag had a significant acceleration effect on the mass transfer. The mass transfer rate(or the reaction rate) of the system with the slag was approximately 5 times larger than that of the system without the slag. In the first 20 min of the refining, rates of magnesium mass transfer at the steel/inclusion interface, steel/refractory interface, and steel/slag interface were x, 1.1 x, and 2.2 x,respectively. The composition transformation of inclusions and the mass transfer of magnesium and aluminum in the steel were predicted with an acceptable accuracy using the established kinetic model.

关键词： mass transfer steel slag lining refractory nonmetallic inclusions kinetic model

Coupling effect of micro-textured tools and cooling conditions on the turning performance of aluminum alloy 6061

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Advances in Manufacturing 2023年第4期11卷 663-681页

作者： Guo-Liang Liu jin-Tao Zheng Chuan-Zhen Huang Shu-feng Sun Xin-Fu Liu Long-Jie Dai De-Xiang Wang Xiang-Yu Wang Key Lab of Industrial Fluid Energy Conservation and Pollution Control Ministry of EducationKey Lab of Industrial Fluid Energy Conservation and Pollution ControlMinistry of EducationSchool of Mechanical and Automotive EngineeringQingdao University of TechnologyQingdao266520ShandongPeople’s Republic of China State Key Laboratory of High Performance Complex Manufacturing Central South UniversityChangsha410083People’s Republic of China Key Laboratory of High-Efficiency and Clean mechanical Manufacture(Ministry of Education) School of Mechanical EngineeringShandong UniversityJinan250061People’s Republic of China school of mechanical engineering Yanshan UniversityQinhuangdao066004HebeiPeople’s Republic of China Qingdao Choho Ind Co Ltd Qingdao266705ShandongPeople’s Republic of China school of mechanical engineering University of JinanJinan250022People’s Republic of China

Micro-texturing has been widely proven to be an effective technology for achieving sustainable ***,the performance of micro-textured tools under different cooling conditions,especially their coupling effect on machined surface integrity,was scarcely *** this paper,the non-textured,linear micro-grooved,and curvilinear micro-grooved inserts were used to turn aluminum alloy 6061 under dry,emulsion,and liquid nitrogen cryogenic cooling *** coupling effects of different micro-textures and cooling conditions on cutting force,cutting temperature,and machined surface integrity,including the surface roughness,work hardening,and residual stress,were revealed and discussed in *** indicated that the micro-grooved tools,especially the curvilinear micro-grooved tools,not only reduced the cutting force and cutting temperature,but also improved the machined surface *** addition,the micro-grooved tools can cooperate with the emulsion or liquid nitrogen to reduce the cutting force,cutting temperature,and improve the machined surface integrity generally,although the combination of emulsion cooling condition and micro-grooved tools generated negative coupling effects on cutting forces and surface work ***,the combination of curvilinear micro-grooved cutting tools and cryogenic cooling condition resulted in the lowest cutting force and cutting temperature,which generated the surface with low roughness,weak work hardening,and compressive residual stress.

关键词： Micro-grooved cutting tool Cooling condition Cutting force Cutting temperature Surface integrity

High temperature stress–strain curves of MnS and their applications in finite element simulation

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Transactions of Nonferrous Metals Society of China 2018年第10期28卷 2082-2093页

作者： Miao jin Lin-lin YU Xin-gang LIU Bao-feng GUO Key Laboratory of Advanced Forging&Stamping technology and Science Ministry of EducationYanshan UniversityQinhuangdao 066004China school of mechanical engineering Yanshan UniversityQinhuangdao 066004China

A novel method for testing stress–strain curves of non-metallic materials was *** high temperature stress-strain curves of MnS were preliminarily obtained and corrected to account for the influence of *** the finite element method,the influence of deformation parameters on the deformation evolution of MnS inclusions was investigated based on the experimental reference *** corresponding physical experiment was designed for comparative *** results indicate that the experimental high-temperature deformation data of MnS are highly *** the process of matrix deformation,the shapes of MnS inclusions change from spherical to ellipsoidal and even to *** are some differences in the morphological deformation of MnS inclusions located at different *** the increase in the initial size of MnS inclusions,the risk of failing the inclusion-flaw inspection increases and the forging quality further deteriorates.

关键词： inclusion MnS stress-strain curve finite element method morphology

燃气轮机电液伺服泵控IGV位置补偿控制研究

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船舶工程 2020年第12期42卷 85-92页

作者：闫桂山金振林赵鹏辉燕山大学机械工程学院河北秦皇岛066004 河北省重型智能制造装备技术创新中心河北秦皇岛066004

以燃气轮机进口可转导叶(IGV)位置控制为背景,提出伺服电机-定量泵-液压缸容积控制方案,形成电液伺服泵控IGV技术。分析IGV位置控制作用与原理,建立电液伺服泵控IGV数学模型,提出位置补偿控制策略,通过对系统流量输出、油液压缩与泄漏... 详细信息

以燃气轮机进口可转导叶(IGV)位置控制为背景,提出伺服电机-定量泵-液压缸容积控制方案,形成电液伺服泵控IGV技术。分析IGV位置控制作用与原理,建立电液伺服泵控IGV数学模型,提出位置补偿控制策略,通过对系统流量输出、油液压缩与泄漏、软参数时变等进行实时补偿,实现IGV位置高精度控制。依托燃气轮机电液伺服泵控IGV试验平台展开仿真和试验研究,研究结果表明所提出的补偿控制策略具有良好的控制效果,为电液伺服泵控IGV技术的工程应用与推广奠定理论和技术基础,助力燃气轮机的技术升级与产品优化。

关键词：燃气轮机电液伺服泵控进口可转导叶(IGV) 位置补偿控制

316L/EH40复合样件热压缩有限元模拟与实验研究

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塑性工程学报 2019年第6期26卷 128-133页

作者：金贺荣韩民峰燕山大学先进锻压成形技术与科学教育部重点实验室河北秦皇岛066004 燕山大学河北省并联机器人与机电系统实验室河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004

应用MSC. Marc软件建立不锈钢316L/微合金钢EH40复合样件热压缩成形的三维热力耦合有限元模型,对复合样件的热压缩过程进行仿真研究。有限元仿真对双金属层厚度值的预测误差在10%以内,可用于对双金属材料复合比变化规律的研究。通过有... 详细信息

应用MSC. Marc软件建立不锈钢316L/微合金钢EH40复合样件热压缩成形的三维热力耦合有限元模型,对复合样件的热压缩过程进行仿真研究。有限元仿真对双金属层厚度值的预测误差在10%以内,可用于对双金属材料复合比变化规律的研究。通过有限元仿真试错法代替实验试错法,分析实验过程中复合样件频繁出现压偏现象的原因。对比实验与仿真结果发现,复合样件各组成部分同轴度精度保持不良是导致样件偏斜的主要原因。316L不锈钢中间层0. 1 mm的偏移会导致样件在50%以上的较大压缩变形时出现严重偏斜现象。最终通过优化样件设计与装夹方案,有效解决了样件偏斜问题,保证了实验的有效开展。

关键词：复合样件热压缩实验样件偏斜数值模拟

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加热时间对镀锌高强钢板液态金属脆性的影响

钢铁 2023年第5期58卷 124-130页

作者：范金卓任英任强张立峰燕山大学机械工程学院河北秦皇岛066004 北京科技大学冶金与生态工程学院北京100083 北方工业大学机械与材料工程学院北京100114

电阻焊接技术是汽车车身结构和零件拼接的主要连接技术。但是镀锌高强钢板材在电阻焊接过程中会发生液态金属脆现象,造成焊点开裂。为了改善DH980镀锌高强钢板的液态金属脆性断裂难题,研究了加热时间对DH980镀锌高强钢板拉伸脆性断裂的... 详细信息

电阻焊接技术是汽车车身结构和零件拼接的主要连接技术。但是镀锌高强钢板材在电阻焊接过程中会发生液态金属脆现象,造成焊点开裂。为了改善DH980镀锌高强钢板的液态金属脆性断裂难题,研究了加热时间对DH980镀锌高强钢板拉伸脆性断裂的影响机理。采用高温拉伸试验模拟镀锌高强钢板电阻焊接的过程,在800℃下分别对镀锌高强钢和不镀锌高强钢进行拉伸试验。试验结果表明,镀锌高强钢试样的抗拉强度小于不镀锌试样的抗拉强度。在800℃下对镀锌高强钢试样分别保温10、20、30、40 s后拉伸,发现保温10、30、40 s的试样的抗拉强度比不保温试样的抗拉强度大。使用扫描电子显微镜观察拉断后样品的微观相貌和镀层变化情况,发现拉断后的试样的镀锌层主要由α(Zn)+L相和α(Zn)相组成。α(Zn)+L相为α(Zn)与液态锌的混合相,使得镀锌高强钢在拉伸试验过程中存在液态金属。同时,镀锌高强钢试样收到拉伸应力的作用,满足了液态金属脆现象发生的条件,即存在液态金属且钢基体受到拉伸应力的作用。因此在800℃下对DH980镀锌高强钢进行拉伸试验会发生液态金属脆现象。随着保温时间的延长,靠近钢基体位置的α(Zn)+L相逐渐转变为α(Zn)相。α(Zn)相在800℃下为固态,可以避免钢基体与液态锌接触。因此,增大保温时间可以对DH980镀锌钢板的液态金属脆起到一定的抑制作用。

关键词： DH980钢高强钢镀锌钢液态金属脆高温拉伸

压下率对316L/EH40复合板界面微观形貌的影响

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钢铁 2019年第12期54卷 62-69页

作者：金贺荣韩民峰段昌新燕山大学先进锻压成型技术与科学教育部重点实验室河北秦皇岛066004 燕山大学河北省并联机器人与机电系统实验室河北秦皇岛066004 燕山大学机械工程学院河北秦皇岛066004

为确定制备316L/EH40不锈钢复合板所需压下率,采用***有限元软件模拟研究了316L/EH40不锈钢复合板在不同压下率下的轧制过程,通过对变形区结合界面处应力场与应变场的综合分析,确定不锈钢复合板实现有效黏合的最小压下率为55%。基于有... 详细信息

为确定制备316L/EH40不锈钢复合板所需压下率,采用***有限元软件模拟研究了316L/EH40不锈钢复合板在不同压下率下的轧制过程,通过对变形区结合界面处应力场与应变场的综合分析,确定不锈钢复合板实现有效黏合的最小压下率为55%。基于有限元仿真结果,采用Gleeble-3800热模拟试验机制备了不同变形率下的复合样件,并对复合样件结合界面处的微观组织形貌进行了观测。通过分析得出结论,样件压下率达到30%后,结合界面处孔隙基本闭合,但仍有部分夹杂物和微孔存在;当压下率超过50%后,结合界面处微孔完全消失,夹杂物数量减少并且尺寸减小;低合金钢侧组织由铁素体和珠光体组成,靠近结合面处存在脱碳层,随着压下率的提高,脱碳层厚度逐渐降低;不锈钢侧由奥氏体组织组成,奥氏体晶粒尺寸随着压下率的提高得到不同程度的细化;显微硬度值随着压下率提高逐渐增大。

关键词：不锈钢复合板压下率显微组织元素扩散