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1. 发明申请

US20220243299A1 DEVICE AND METHOD FOR PEENING BY COUPLING LASER SHOCK WAVE AND ULTRASONIC SHOCK WAVE IN REAL TIME 有权
公开(公告)号：US20220243299A1
公开(公告)日：2022-08-04
申请号：US17565421
申请日：2021-12-29
申请人： Jiangsu University
发明人： Xiankai MENG , Yaomin ZHAO , Jinzhong LU , Jianzhong ZHOU , Yanhu ZHANG , Shu HUANG , Jie CAI , Pengfei LI
IPC分类号： C21D10/00 , F01D5/28
摘要： The present invention provides a device for peening by coupling a laser shock wave and an ultrasonic shock wave in real time. The device includes a synchronization device, a laser device, two ultrasonic shock devices, a working platform and a control system. An upper casing is supported above a base through second hydraulic cylinders. Two supporting beams are provided under the upper casing through the second hydraulic cylinders. Limiting slide rails are provided under the upper casing through first hydraulic cylinders. The two ultrasonic shock devices are connected through the synchronization device, which is configured to synchronize movement and rotation of the two ultrasonic shock devices. The laser device is configured to generate a laser beam to pass through the upper casing and irradiate a surface of a workpiece. The control system controls the laser device to lag behind the two ultrasonic shock devices to perform laser shock.

2. 发明申请

US20220325702A1 ELECTRO-RESPONSIVE FOLDING AND UNFOLDING COMPOSITE MATERIAL FOR 4D PRINTING, METHOD FOR MANUFACTURING SAME, AND METHOD FOR REGULATING SHAPE MEMORY BEHAVIOR THEREOF 有权
公开(公告)号：US20220325702A1
公开(公告)日：2022-10-13
申请号：US17600120
申请日：2020-11-05
申请人： Jiangsu University
发明人： Shu HUANG , Hang ZHANG , Mingyuan SHAN , Jie SHENG , Jinzhong LU , Jianzhong ZHOU , Jiean WEI , Shuangliu ZHOU , Wei XU
IPC分类号： F03G7/06 , H02N10/00 , B33Y80/00 , B33Y10/00 , B29C64/188 , B23K26/21
摘要： The present invention relates to the field of 4D printing, and particularly to an electro-responsive folding and unfolding composite material for 4D printing, a method for manufacturing the same, and a method for regulating shape memory behavior thereof. In the process of layer-by-layer printing, conductive layers are embedded into a pre-designed shape memory polymer matrix through spray-coating and laser-irradiation nano-fusion welding, to manufacture a folding and unfolding structure with electro-responsive shape memory behavior. The distribution and range of heat affected zones in the electro-responsive shape memory folding and unfolding structure are controlled by adjusting the number of electric heating layers energized and the value of an energizing voltage. The speed of shape recovery and the degree of shape recovery of the structure are regulated according to a magnitude relationship between a shape recovery force Frecovery and a resistance Fresistance to shape recovery of the structure.

3. 发明公开

US20240261903A1 METHOD OF STRENGTHENING THROUGH REAL-TIME COUPLING OF ELECTRICAL PULSES AND LASER SHOCK WAVES 审中-公开
公开(公告)号：US20240261903A1
公开(公告)日：2024-08-08
申请号：US18034079
申请日：2022-07-26
申请人： JIANGSU UNIVERSITY
发明人： Jinzhong LU , Weiwei DENG , Kaiyu LUO , Haifei LU
IPC分类号： B23K26/356 , B23K26/00 , B23K26/0622 , C21D10/00
CPC分类号： B23K26/356 , B23K26/0006 , B23K26/0622 , C21D10/005
摘要： A method of strengthening through real-time coupling of electrical pulses and laser shock waves is provided. The initial time and duration of the electrical pulses are controlled to be matched with the initial time and duration of the laser shock waves, so that the electrical pulses and the laser shock waves are coupled in real time for material strengthening, the plasticity and the strength of the material are greatly improved, and a large area of the workpiece is uniformly strengthened. By simultaneously introducing the electrical pulses into the pulse current-assisted LSP, a great strengthening effect is achieved through the combination of the electrical pulses and the pulse current-assisted LSP in a short time, thereby reducing the internal defects of the material to a certain extent and further increasing the fatigue life of the material.

4. 发明申请

US20210164106A1 COMBINED TREATMENT METHOD FOR IMPROVING CORROSION RESISTANCE OF METAL COMPONENT IN CHLORINE-CONTAINING SOLUTION 有权
公开(公告)号：US20210164106A1
公开(公告)日：2021-06-03
申请号：US16066305
申请日：2017-10-09
申请人： Institute of Laser and Optoelectronics Intelligent Manufacturing, Wenzhou University , JiangSu University
发明人： Yao XUE , Kaiyu LUO , Haifei LU , Jinzhong LU
IPC分类号： C23C22/76 , C21D10/00 , C23C22/83 , C23C22/78
摘要： Disclosed is a combined treatment method for improving corrosion resistance of metal component in chlorine-containing solution. First, the metal component is placed in the chlorine-containing solution. Large-area overlapping laser shock peening without an absorbing layer is used, when laser pulses are irradiated on the target metal component, the metal matrix surface absorbs the laser energy, vaporizes and expands to form a high-temperature and high-pressure plasma, a chlorine-containing passivation film is formed, to improve the surface corrosion resistance of the metal component. After that, the surface layer of the metal component is subjected to surface polishing, followed by large-area overlapping laser shock peening with an absorbing layer at room temperature, to further improve the corrosion resistance of the metal component. The combined treatment method of the present invention can be applied to improve the corrosion resistance of metal components in highly corrosive chlorine-containing environments of seawater and the like.

5. 发明公开

US20240139813A1 ECCENTRIC EXTREME HIGH-SPEED-RATE LASER HYBRID MANUFACTURING METHOD FOR ROTARY ENGINEERING COMPONENT 审中-公开
公开(公告)号：US20240139813A1
公开(公告)日：2024-05-02
申请号：US18273270
申请日：2022-02-25
申请人： Jiangsu University
发明人： Jinzhong LU , Xiang XU , Kaiyu LUO , Jialong DU , Xingyu BU
IPC分类号： B22F10/38 , B22F7/06 , B22F10/25 , B22F10/31 , B22F10/366 , B22F10/85 , B33Y10/00 , B33Y40/10 , B33Y50/02 , B33Y80/00
CPC分类号： B22F10/38 , B22F7/062 , B22F10/25 , B22F10/31 , B22F10/366 , B22F10/85 , B33Y10/00 , B33Y40/10 , B33Y50/02 , B33Y80/00 , B22F2007/068 , B22F2998/10
摘要： The present disclosure relates to an eccentric extreme high-speed-rate laser hybrid manufacturing method for a rotary engineering component. By positioning an extreme high-speed-rate laser direct energy deposition machining head at a predetermined eccentric distance, the damage caused by reflected light to the machining head is effectively reduced, to prolong a service life of the machining head. Also a conventional form of a molten pool in extreme high-speed-rate laser direct energy deposition can be changed, namely from a “falling” form caused by a high-speed movement and a gravity to a “climbing” form. Thus, in extreme high-speed-rate laser direct energy deposition machining, the molten pool has a longer time to fully contact a surface of the rotary engineering component to form desirable bonding performance.

6. 发明申请

US20210308767A1 LASER SHOCK PEENING METHOD FOR ADDITIVE MANUFACTURED COMPONENT OF DOUBLE-PHASE TITANIUM ALLOY 有权
公开(公告)号：US20210308767A1
公开(公告)日：2021-10-07
申请号：US17280924
申请日：2020-09-18
申请人： JIANGSU UNIVERSITY
发明人： Jinzhong LU , Haifei LU , Xiancheng ZHANG , Kaiyu LUO , Guang YANG
IPC分类号： B22F10/64 , B33Y40/20 , C21D10/00 , B33Y50/00 , B22F10/28 , B22F10/50
摘要： A laser shock peening method for an additive manufactured component of a double-phase titanium alloy is provided. First, a three-dimensional digital model of a complex component is obtained, and the model is divided into a plurality of slices; a forming direction of a formed part in an additive manufacturing process is determined according to a stress direction of the additive manufactured component in an engineering application; then, the component of the double-phase titanium alloy is formed and manufactured by selective laser melting, and orientations of a C-axis of an α phase is allowed to be consistent through adjustment and control; and finally, laser shock peening is performed on all outer surfaces of the high-performance additive manufactured component of the double-phase titanium alloy by inducing a high-intensity shock wave to act in an acting direction which forms an angle in a predetermined range with the C-axis of the as phase.

7. 发明申请

US20200181722A1 A COMBINED FABRICATING METHOD FOR GRADIENT NANOSTRUCTURE IN SURFACE LAYER OF METAL WORKPIECE 审中-公开
公开(公告)号：US20200181722A1
公开(公告)日：2020-06-11
申请号：US16069336
申请日：2017-06-08
申请人： JIANGSU UNIVERSITY
发明人： Jinzhong LU , Liujun WU , Kaiyu LUO , Shijie JI
IPC分类号： C21D1/09 , C21D7/06 , C21D10/00 , B24C1/10
摘要： The present invention relates to a combined fabricating method for gradient nanostructure in the surface layer of a metal workpiece, i.e., first, a plastic deformation layer in great depth is induced by laser shock peening, then the surface of the metal workpiece is nanocrystallized by surface mechanical attrition treatment, and finally gradient nanostructure is obtained in the surface layer of the metal workpiece with desirable layer thickness and optimized micro-structure distribution. With the method provided in the present invention, gradient nanostructure with desirable layer thickness and optimized micro-structural distribution can be obtained in the surface layer, and the surface roughness of the metal workpiece can be significantly improved at the same time; the technique breaches the “reversed relationship” between strength and plasticity, ensures coexistence of good plasticity and high strength, and greatly improves the overall mechanical properties of the metal workpiece, including fatigue life and wear resistance, etc. The method provided in the present invention can induce gradient nanostructure in the surface layer of a metal workpiece, including aluminum alloy, titanium alloy, magnesium alloy, stainless steel, and nickel-based superalloy, etc., and is applicable to many fields such as strengthening and reparation of key and important parts in aeronautic and astronautic industry, automobile manufacturing and ship building industries, and chemical industry, etc.

8. 发明申请

US20210407711A1 Laser Shock Peening Method for Improving the Corrosion Resistance of Sintered Nd-Fe-B Magnet 有权
公开(公告)号：US20210407711A1
公开(公告)日：2021-12-30
申请号：US16492574
申请日：2018-08-06
申请人： JIANGSU UNIVERSITY
发明人： Kaiyu LUO , Changyu WANG , Fang WANG , Yefang YIN , Xiaohong XU , Jinzhong LU
IPC分类号： H01F1/057 , C21D10/00 , H01F41/02
摘要： Disclosed is a surface modification technique for permanent magnetic materials. First, a sintered Nd—Fe—B magnet is immersed in a chlorine-containing solution to corrode its surface after the sintered Nd—Fe—B magnet is ground, polished and cleaned, so that atomic vacancies or gaps are produced at the grain boundaries in the surface layer of the corroded sintered Nd—Fe—B magnet; then, compound nanopowders coated on the surface of the sintered Nd—Fe—B magnet are implanted into the grain boundaries by laser shock peening to obtain a gradient nanostructure layer along the depth direction; at the same time, the surface nanocrystallization of the sintered Nd—Fe—B magnet and a residual compressive stress layer are induced by laser shock peening which remarkably improves the corrosion resistance of the sintered Nd—Fe—B magnet.

9. 发明申请

US20210283730A1 ELECTROMAGNETIC APPARATUS FOR ACTIVE INTERVENTION TO SHAPE OF MOLTEN POOL 有权
公开(公告)号：US20210283730A1
公开(公告)日：2021-09-16
申请号：US17257337
申请日：2020-04-28
申请人： JIANGSU UNIVERSITY
发明人： Jianzhong ZHOU , Kun HUO , Fengze DAI , Xiankai MENG , Pengfei LI , Shu HUANG , Jinzhong LU
IPC分类号： B23K37/06 , B23K37/04
摘要： An electromagnetic apparatus for active intervention to a shape of a molten pool is provided. In the present invention, a workpiece is placed on stepped surfaces of a test bench. Upon power on, a metal rod rotates to generate a toroidal magnetic field centered on the metal rod, and the toroidal magnetic field acts on the molten pool to generate an induced current. The induced current generates Lorentz force under the action of the magnetic field, which acts perpendicularly on an outer surface of the molten pool, thereby changing the height, depth and width of the molten pool, and finally realizing the active intervention to the molten pool shape.

10. 发明申请

US20210205930A1 A DOUBLE-SIDE SYNCHRONOUS LASER SHOCK PEENING METHOD FOR LEADING EDGE OF TURBINE BLADE 有权
公开(公告)号：US20210205930A1
公开(公告)日：2021-07-08
申请号：US16068092
申请日：2017-03-29
申请人： JIANGSU UNIVERSITY
发明人： Jinzhong LU , Haifei LU , Kaiyu LUO , Liujun WU , Changyu WANG
IPC分类号： B23K26/356 , B23K26/06 , B23K26/0622 , B23K26/146
摘要： A double-side synchronous laser shock peening (LSP) method for leading edges of turbine blades employs two laser beams with the same diameter and different pulse energy to synchronously shock the front and back sides of each point within 8-10 mm range of the leading edge of the blade, wherein the laser pulse energy on the front side is greater than the laser pulse energy on the back side, and wherein, the laser power density on the front side is used to generate dynamic plastic deformation on the entire laser-shock spot area, while the laser power density on the back side is used to balance off excessive shock-wave pressure in the central area of laser-shock spot on the front side and avoid macroscopic deformation of the blade in the central area of laser-shock spot on the front side, and an optimal strengthening effect is achieved finally.

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