技术领域technical field
本发明一种基于选区激光融化的粉末冶金成型功能梯度材料的方法，属于3D打印增材制造技术领域。The invention discloses a powder metallurgy molding method for functionally graded materials based on selective laser melting, which belongs to the technical field of 3D printing additive manufacturing.
背景技术Background technique
功能梯度材料（FGM）是采用先进的材料复合技术，使材料的组成、结构沿厚度方向呈梯度变化的一种新型的非均质复合材料。从材料的组合方式来看，功能梯度材料可分为金属/陶瓷，陶瓷/陶瓷，陶瓷/塑料等多种组合方式，从而获得多种特殊功能的材料，能够解决高速航空航天器中材料的热应力缓和问题，应用前景广阔。Functionally graded material (FGM) is a new type of heterogeneous composite material that uses advanced material composite technology to make the composition and structure of the material change in a gradient along the thickness direction. From the perspective of material combination, functionally graded materials can be divided into metal/ceramic, ceramic/ceramic, ceramic/plastic and other combinations, so as to obtain a variety of materials with special functions, which can solve the thermal problem of materials in high-speed aerospace vehicles. The problem of stress relaxation has broad application prospects.
FGM的制备方法主要有等离子喷涂、气相沉积、粉末冶金、自蔓延烧结等方法。等离子喷涂法从理论上说可以做出无限大的材料，且梯度层的复合物系可选择性较大，梯度层的密度可控，适于飞机发动机及高效燃汽机的引擎部件的表面保护。气相沉积法包括化学气相沉积和物理气相沉积两类，前者是利用材料的气体间的化学反应形成沉积层，后者是利用材料的物理反应使材料蒸发，然后沉积到另一材料表面。气相沉积法速率太慢，只适合制薄膜类材料。粉末冶金法，首先计算出各梯度层的成分，然后按成分设计进行混料、布料、成形，最后进行烧结。这种方法易于操作，控制灵活，适于工业生产，可以制备大尺寸材料，不足之处是制备复杂结构零件时，需要额外定制模具，周期较长，而且成本较高。自蔓延烧结法是通过反应剂在一定条件下发生热化学反应，产生高温高压来合成。这种方法的优点是合成时间短、操作简单，但这种方法需要专用设备。成形精度难以把握，往往需要进行二次加工。综上所述，FGM应用前景广阔，但是FGM材料制备时各梯度层厚度难以把握，FGM复杂零件成形成本高、周期长，成形精度仍需进一步提高。The preparation methods of FGM mainly include plasma spraying, vapor deposition, powder metallurgy, self-propagating sintering and other methods. Theoretically speaking, the plasma spraying method can make infinite materials, and the compound system of the gradient layer has a large selectivity, and the density of the gradient layer is controllable, which is suitable for the surface protection of engine components of aircraft engines and high-efficiency gas engines. Vapor deposition methods include chemical vapor deposition and physical vapor deposition. The former uses the chemical reaction between the gases of the material to form a deposition layer, and the latter uses the physical reaction of the material to evaporate the material and then deposit it on the surface of another material. The speed of vapor deposition method is too slow, so it is only suitable for making thin film materials. In the powder metallurgy method, the composition of each gradient layer is first calculated, and then mixed, distributed, formed according to the composition design, and finally sintered. This method is easy to operate, flexible in control, suitable for industrial production, and can prepare large-scale materials. The disadvantage is that when preparing complex structural parts, additional custom molds are required, the cycle is long, and the cost is high. The self-propagating sintering method is synthesized through the thermochemical reaction of the reactants under certain conditions to generate high temperature and high pressure. The advantages of this method are short synthesis time and simple operation, but this method requires special equipment. Forming accuracy is difficult to grasp, and secondary processing is often required. To sum up, FGM has broad application prospects, but it is difficult to grasp the thickness of each gradient layer in the preparation of FGM materials, the forming cost of FGM complex parts is high, the cycle is long, and the forming accuracy still needs to be further improved.
选择性激光熔化成形技术（SLM）可以成形任意形状的复杂零件，其基本原理是：首先用三维软件建立零件模型，利用切片软件进行切片处理，获得零件的二维轮廓信息并导入成型设备。激光束开始扫描前，铺粉装置首先把金属粉末平铺到成形缸的基板上，激光束再按当前层的填充轮廓线选区熔化成形基板上的金属粉末。加工完当前层后，铺粉装置在已加工好的当前层上铺好金属粉末，设备调入下一层轮廓的数据进行加工，如此层层加工，直到整个零件加工完毕。SLM技术可制备形状复杂的金属零件，同时由于高激光功率可熔化成形高熔点金属。该技术可快速而精确地制造出任意复杂形状的零件，大大减少了加工工序，减少了加工周期。SLM成形过程中，由于是逐层激光熔化成形，成形效率仍需进一步提高。Selective laser melting technology (SLM) can form complex parts of any shape. The basic principle is: firstly, use 3D software to build a part model, use slicing software to slice, obtain the 2D contour information of the part and import it into the forming equipment. Before the laser beam starts to scan, the powder spreading device first spreads the metal powder on the substrate of the forming cylinder, and then the laser beam melts the metal powder on the forming substrate according to the filling contour of the current layer. After the current layer is processed, the powder spreading device spreads the metal powder on the processed current layer, and the equipment transfers the data of the contour of the next layer for processing, and so on layer by layer until the entire part is processed. SLM technology can prepare metal parts with complex shapes, and at the same time, due to high laser power, it can melt and form high melting point metals. This technology can quickly and accurately manufacture parts of any complex shape, greatly reducing the processing steps and cycle time. In the SLM forming process, due to the layer-by-layer laser melting forming, the forming efficiency still needs to be further improved.
发明内容Contents of the invention
本发明克服了现有技术存在的不足，提供了一种基于选区激光融化的粉末冶金成型功能梯度材料的方法，该成形方法将SLM技术和粉末烧结技术相结合，首先进行SLM成形，在零件不同截面铺设不同成分材料，并用激光熔化成形该零件的外形轮廓及零件内部部分结构，整个零件外形轮廓成形后，将零件进行高温烧结，使零件轮廓内部未被熔化的粉末烧结成形。The present invention overcomes the deficiencies in the prior art and provides a powder metallurgy-based method for forming functionally graded materials based on selective laser melting. The forming method combines SLM technology and powder sintering technology. Different composition materials are laid on the section, and the outline of the part and the internal structure of the part are formed by laser melting. After the outline of the entire part is formed, the part is sintered at high temperature to sinter the unmelted powder inside the outline of the part.
为了解决上述技术问题，本发明采用的技术方案为：一种基于选区激光融化的粉末冶金成型功能梯度材料的方法，具体按照以下步骤施行：In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a method of powder metallurgy forming functionally graded materials based on selective laser melting, which is specifically implemented according to the following steps:
a.根据成形零件需要，计算功能梯度材料成分配比、梯度组分及层厚。a. According to the needs of formed parts, calculate the composition ratio, gradient components and layer thickness of functionally graded materials.
b.装料，制备不同组份的成形粉末，并将不同组份的粉末按顺序依次装入供料缸，并设定供粉缸落料方式。b. Loading, preparing shaped powders of different components, and loading the powders of different components into the feeding tank in sequence, and setting the feeding mode of the powder feeding tank.
c.用三维软件设计功能梯度材料的成形模型。c. Design the forming model of the functionally graded material with 3D software.
d.对成形件的使用情况进行模拟，分析温度、受力等对成形件的影响，进一步优化成形件结构模型。d. Simulate the use of the formed parts, analyze the influence of temperature and force on the formed parts, and further optimize the structural model of the formed parts.
e.对成形件模型进行切片处理，设定层厚度、激光功率、扫描速度等工艺参数并传输到成形机，进行SLM成形。e. Slice the formed part model, set the process parameters such as layer thickness, laser power, scanning speed and transmit it to the forming machine for SLM forming.
f.将成形零件进行高温烧结。f. Sintering the shaped parts at high temperature.
g.对高温烧结的零件进行热处理，表面喷砂打磨。g. Carry out heat treatment on the parts sintered at high temperature, and sandblast and polish the surface.
优选的，所述步骤b中，采用由多个供料缸组成的上供粉方式，供料缸截面为梯形，通过螺栓将多个供料缸固定在横梁上，供料缸底部安装带有轮槽的滚轮，该滚轮受电机控制，电机连接控制系统。根据成形顺序，控制系统控制每个料缸下面的电机转动，从而使该料缸中的粉末漏出，实现采阶梯式落料方式，依次下落需要成形的粉料。Preferably, in the step b, an upper powder supply method consisting of multiple feeding cylinders is adopted, the section of the feeding cylinder is trapezoidal, and the multiple feeding cylinders are fixed on the beam by bolts, and the bottom of the feeding cylinder is installed with a The roller of the wheel groove is controlled by a motor, and the motor is connected to the control system. According to the forming sequence, the control system controls the rotation of the motor under each material tank, so that the powder in the material tank leaks out, and realizes the step-by-step blanking method, and the powder to be formed is dropped in sequence.
优选的，所述步骤c中，零件内部结构设计成蜂窝状，外形轮廓为实心，外形轮廓壁厚为5-10mm。Preferably, in the step c, the internal structure of the part is designed in a honeycomb shape, the outline is solid, and the wall thickness of the outline is 5-10 mm.
优选的，所述步骤e中，在SLM成形过程中，铺完粉后进行压实，压力在10-30MPa之间。Preferably, in step e, during the SLM forming process, compaction is carried out after the powder is laid, and the pressure is between 10-30 MPa.
本发明与现有技术相比具有的有益效果是：本方法将SLM技术和粉末烧结技术相结合制备复杂结构的功能梯度零件，能够精确控制FGM梯度层厚度，制备质量优良的FGM材料。同时也可以快速而精确地制造出任意复杂形状的零件，大大减少了加工工序，减少了加工周期，降低了生产成本。Compared with the prior art, the present invention has the beneficial effects that: the method combines SLM technology and powder sintering technology to prepare functionally graded parts with complex structures, can precisely control the thickness of the FGM gradient layer, and prepare FGM materials with excellent quality. At the same time, parts of any complex shape can be manufactured quickly and accurately, which greatly reduces the processing steps, reduces the processing cycle, and reduces the production cost.
附图说明Description of drawings
下面结合附图对本发明做进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
图1为本发明成形装置供粉缸排列组合方式示意图。Figure 1 is a schematic diagram of the arrangement and combination of the powder supply cylinders of the forming device of the present invention.
图中：1为供料缸、2为横梁、3为螺栓、4为滚轮、5为电机、6为电缆、7为控制系统。In the figure: 1 is the feeding cylinder, 2 is the beam, 3 is the bolt, 4 is the roller, 5 is the motor, 6 is the cable, and 7 is the control system.
具体实施方式detailed description
实施例一Embodiment one
一种钨铜功能梯度材料小型发动机喷管的制备。Preparation of a small engine nozzle made of tungsten-copper functionally graded material.
a.根据该小型发动机喷管的使用特点，该成形件材料为钨铜功能梯度材料，外径为100mm，内径为80mm，高度为100mm。其中铜的含量变化梯度为15%，20%，25%，30%，梯度层厚均为25mm，分别称之为第一梯度层，第二梯度层，第三梯度层，第四梯度层。a. According to the use characteristics of the small engine nozzle, the material of the formed part is tungsten-copper functionally graded material, the outer diameter is 100mm, the inner diameter is 80mm, and the height is 100mm. Among them, the copper content change gradient is 15%, 20%, 25%, 30%, and the gradient layer thickness is 25mm, which are respectively called the first gradient layer, the second gradient layer, the third gradient layer, and the fourth gradient layer.
b.装料，将铜的含量为15%，20%，25%，30%的钨铜合金粉分别装入不同供料缸，供料缸结构为：螺栓3将供料缸1固定在横梁2上，供料缸底部安装带有轮槽的滚轮4，该滚轮受电机5控制，电机5通过电缆6连接控制系统7。根据成形顺序，控制系统控7制每个料缸1下面的电机2转动，从而使该料缸中的粉末漏出，实现采阶梯式落料方式，依次下落需要成形的粉料。该供料缸中：铜的含量为15%，20%，25%，30%的钨铜合金粉，采用阶梯式分别落料（如图1所示）。b. Loading, put tungsten-copper alloy powder with copper content of 15%, 20%, 25%, and 30% into different feeding cylinders respectively. The structure of the feeding cylinder is: bolt 3 fixes feeding cylinder 1 on the beam 2, a roller 4 with a wheel groove is installed at the bottom of the feeding cylinder, the roller is controlled by a motor 5, and the motor 5 is connected to the control system 7 through a cable 6. According to the forming sequence, the control system controls the rotation of the motor 2 under each material cylinder 1, so that the powder in the material cylinder leaks out, and realizes the step-by-step blanking method, and the powder to be formed is dropped in sequence. In the feeding cylinder: the tungsten-copper alloy powder with copper content of 15%, 20%, 25%, and 30% is separately blanked in steps (as shown in Figure 1).
c.用SolidWorks成形软件建立该材料的三维模型，零件内部结构设计成六边形蜂窝状，六边形每个边长为10mm，每个边厚度为5mm。外形轮廓为实心结构，外形轮廓壁厚为8mm。c. Use SolidWorks forming software to establish a three-dimensional model of the material. The internal structure of the part is designed as a hexagonal honeycomb shape. The length of each side of the hexagon is 10mm, and the thickness of each side is 5mm. The outline is a solid structure, and the wall thickness of the outline is 8mm.
d.利用ANSYS模拟软件，该零件在700℃，气体流量为100kg/s，喷管压力为60000Pa状态下，该模型零件的应力应变分析，并根据模拟结果进一步优化模型结构，设计出最佳的成形零件结构。d. Use ANSYS simulation software to analyze the stress and strain of the model part at 700°C, the gas flow rate is 100kg/s, and the nozzle pressure is 60000Pa, and the model structure is further optimized according to the simulation results to design the best Formed part structure.
e.对成形件模型进行切片处理，层片厚度为0.015mm。设定激光功率扫描速度等参数：第一梯度层的激光功率为300W，扫描速度6000mm/s；第二梯度层的激光功率为330W，扫描速度6000mm/s；第三梯度层的激光功率为370W，扫描速度6500mm/s；第四梯度层的激光功率为400W，扫描速度7000mm/s。成形时，铺粉装置压实辊对每层铺好的粉末进行压实，压力为15MPa。e. Carry out slicing processing on the formed part model, and the layer thickness is 0.015mm. Set laser power scanning speed and other parameters: the laser power of the first gradient layer is 300W, and the scanning speed is 6000mm/s; the laser power of the second gradient layer is 330W, and the scanning speed is 6000mm/s; the laser power of the third gradient layer is 370W , the scanning speed is 6500mm/s; the laser power of the fourth gradient layer is 400W, and the scanning speed is 7000mm/s. When forming, the compacting roller of the powder spreading device compacts the powder laid on each layer with a pressure of 15MPa.
f.将成型的零件在1300℃的氮气气氛中烧结5h。f. Sinter the molded part in a nitrogen atmosphere at 1300°C for 5 hours.
g.对高温烧结的零件进行热处理，将烧结的钨铜功能梯度材料在350-400℃退火6h左右，随炉冷却至室温。随后对成形件表面进行喷砂打磨处理，制备出表面质量和内部组织优良的制品。g. Perform heat treatment on the high-temperature sintered parts, anneal the sintered tungsten-copper functionally graded material at 350-400°C for about 6 hours, and cool to room temperature with the furnace. Then, the surface of the formed part is sandblasted and polished to prepare a product with excellent surface quality and internal structure.
实施案例二Implementation Case 2
一种铝基SiC功能梯度材料耐热板的制备。Preparation of an aluminum-based SiC functionally graded material heat-resistant plate.
a.该耐热板材料为铝基SiC功能梯度材料，尺寸为100×80×15mm（长宽高）。铝基体为ZL101，高度方向SiC的含量变化为：0.6%，0.8%，1.0%，0.8%，0.6%，梯度层厚均为3mm，分别称之为第一梯度层，第二梯度层，第三梯度层，第四梯度层，第五梯度层。a. The heat-resistant plate material is an aluminum-based SiC functionally graded material with a size of 100×80×15mm (length, width and height). The aluminum substrate is ZL101, and the SiC content changes in the height direction are: 0.6%, 0.8%, 1.0%, 0.8%, 0.6%, and the thickness of the gradient layer is 3mm, respectively called the first gradient layer, the second gradient layer, and the second gradient layer. The third gradient layer, the fourth gradient layer, and the fifth gradient layer.
b.装料，将SiC的含量变化为：0.6%，0.8%，1.0%，0.8%，0.6%分别装入图1中的5个供料缸，供料缸结构为：螺栓3将供料缸1固定在横梁2上，供料缸底部安装带有轮槽的滚轮4，该滚轮受电机5控制，电机5通过电缆6连接控制系统7。根据成形顺序，控制系统控7制每个料缸1下面的电机2转动，从而使该料缸中的粉末漏出，实现采阶梯式落料方式。通过控制系统设定供料缸开启顺序依次为：SiC含量分别为0.6%，0.8%，1.0%，0.8%，0.6%的铝合金粉，采用阶梯式分别落料。b. Loading, change the content of SiC to: 0.6%, 0.8%, 1.0%, 0.8%, and 0.6% respectively into the five feeding cylinders in Figure 1. The structure of the feeding cylinders is: bolt 3 will feed Cylinder 1 is fixed on crossbeam 2, and roller 4 with wheel groove is installed at the bottom of feeding cylinder, and this roller is controlled by motor 5, and motor 5 is connected control system 7 by cable 6. According to the forming sequence, the control system controls the rotation of the motor 2 under each material cylinder 1, so that the powder in the material cylinder leaks out, and a stepped blanking method is realized. The opening sequence of the feeding cylinder is set by the control system as follows: aluminum alloy powders with SiC contents of 0.6%, 0.8%, 1.0%, 0.8%, and 0.6% are respectively blanked in steps.
c.用SolidWorks成形软件建立该材料的三维模型，零件内部结构设计成网格状，每个网格为正方形，边长为5mm，每个边厚度为2mm。外形轮廓为实心结构，外形轮廓壁厚为5mm。c. Use SolidWorks forming software to establish a three-dimensional model of the material. The internal structure of the part is designed as a grid. Each grid is a square with a side length of 5mm and a side thickness of 2mm. The outline is a solid structure, and the wall thickness of the outline is 5mm.
d.利用ANSYS模拟软件，该零件一侧为800℃，另一侧为室温，该零件传热及应变情况，并根据模拟结果进一步优化模型内部网格结构，设计出最佳的成形零件结构。d. Using ANSYS simulation software, one side of the part is at 800°C, the other side is at room temperature, the heat transfer and strain of the part, and the internal grid structure of the model is further optimized according to the simulation results, and the best formed part structure is designed.
e.对成形件模型进行切片处理，层片厚度为0.015mm。设定激光功率扫描速度等参数：第一梯度层的激光功率为300W，扫描速度6500mm/s；第二梯度层的激光功率为330W，扫描速度7000mm/s；第三梯度层的激光功率为350W，扫描速度7500mm/s；第四梯度层的激光功率为330W，扫描速度7000mm/s；第五梯度层的激光功率为300W，扫描速度6500mm/s。成形时，铺粉装置压实辊对每层铺好的粉末进行压实，压力为10MPa。e. Carry out slicing processing on the formed part model, and the layer thickness is 0.015mm. Set laser power scanning speed and other parameters: the laser power of the first gradient layer is 300W, and the scanning speed is 6500mm/s; the laser power of the second gradient layer is 330W, and the scanning speed is 7000mm/s; the laser power of the third gradient layer is 350W , the scanning speed is 7500mm/s; the laser power of the fourth gradient layer is 330W, and the scanning speed is 7000mm/s; the laser power of the fifth gradient layer is 300W, and the scanning speed is 6500mm/s. When forming, the compacting roller of the powder spreading device compacts the powder laid on each layer with a pressure of 10MPa.
f.将成型的零件高温烧结。烧结工艺为：将成形件装入炉中随炉加热，升温至250℃保温30min，再升温至450℃保温30min，最后加热至500℃保温1h，随炉冷却。f. Sinter the molded parts at high temperature. The sintering process is as follows: put the formed parts into the furnace and heat with the furnace, raise the temperature to 250°C for 30 minutes, then raise the temperature to 450°C for 30 minutes, and finally heat to 500°C for 1 hour, then cool with the furnace.
g.将烧结成形的铝基SiC功能梯度材料在180℃退火5-6h，空冷。g. Anneal the sintered aluminum-based SiC functionally graded material at 180° C. for 5-6 hours, and air-cool.
上面结合实施例对本发明作了详细说明，但是本发明并不限于上述实施例，在本领域普通技术人员所具备的知识范围内，还可以在不脱离本发明宗旨的前提下作出各种变化。The present invention has been described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
| Application Number | Priority Date | Filing Date | Title |
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| CN201611115889.3ACN106623924B (en) | 2016-12-07 | 2016-12-07 | A method of the powder metallurgy forming functionally graded material melted based on precinct laser |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611115889.3ACN106623924B (en) | 2016-12-07 | 2016-12-07 | A method of the powder metallurgy forming functionally graded material melted based on precinct laser |
| Publication Number | Publication Date |
|---|---|
| CN106623924Atrue CN106623924A (en) | 2017-05-10 |
| CN106623924B CN106623924B (en) | 2018-12-11 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611115889.3AActiveCN106623924B (en) | 2016-12-07 | 2016-12-07 | A method of the powder metallurgy forming functionally graded material melted based on precinct laser |
| Country | Link |
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| CN (1) | CN106623924B (en) |
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| CN107774996A (en)* | 2017-10-11 | 2018-03-09 | 华中科技大学 | A kind of integral forming method of the part of more material gradient lattice structures |
| CN109249022A (en)* | 2018-09-21 | 2019-01-22 | 华中科技大学 | A kind of double graded metal porous materials and preparation method thereof |
| CN109759588A (en)* | 2019-03-05 | 2019-05-17 | 上海汉邦联航激光科技有限公司 | A rapid additive manufacturing method for large bimetal parts |
| CN110091413A (en)* | 2019-05-14 | 2019-08-06 | 山东大学 | A kind of function-graded material 3D printing device and working method |
| CN110125399A (en)* | 2019-05-27 | 2019-08-16 | 上海交通大学 | Add more metal parts laser gain material manufacturing methods of transition zone |
| CN110625113A (en)* | 2019-08-27 | 2019-12-31 | 国营芜湖机械厂 | Rapid preparation method of airplane structure crack reinforcing part |
| CN111618298A (en)* | 2020-04-30 | 2020-09-04 | 中北大学 | Efficient collaborative material increase manufacturing method for multi-material variable-stiffness structure |
| CN113894290A (en)* | 2021-09-03 | 2022-01-07 | 南方科技大学 | Preparation method of component failure controllable design and component |
| CN115338425A (en)* | 2022-08-19 | 2022-11-15 | 西安铂力特增材技术股份有限公司 | Complex shape part composite manufacturing method |
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| CN1803348A (en)* | 2006-01-24 | 2006-07-19 | 华中科技大学 | Preparation method for quick preparing functional gradient material |
| CN101722306A (en)* | 2009-12-10 | 2010-06-09 | 华中科技大学 | Near-net-shape method for porous metal part |
| CN202062079U (en)* | 2011-03-29 | 2011-12-07 | 华南理工大学 | Device for directly manufacturing gradient material component |
| CN204621074U (en)* | 2015-05-13 | 2015-09-09 | 西安科技大学 | A kind of large scale that is applied to increases the two-way automatic power spreading mechanism that material manufactures forming machine |
| CN105127426A (en)* | 2015-09-30 | 2015-12-09 | 广西科技大学 | Three-dimensional structure combined sintering processing method |
| CN105170978A (en)* | 2015-09-11 | 2015-12-23 | 华中科技大学 | Hot isostatic pressing forming method for homogeneous sheath with gradient gradual change structure at connection interface |
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1803348A (en)* | 2006-01-24 | 2006-07-19 | 华中科技大学 | Preparation method for quick preparing functional gradient material |
| CN101722306A (en)* | 2009-12-10 | 2010-06-09 | 华中科技大学 | Near-net-shape method for porous metal part |
| CN202062079U (en)* | 2011-03-29 | 2011-12-07 | 华南理工大学 | Device for directly manufacturing gradient material component |
| CN204621074U (en)* | 2015-05-13 | 2015-09-09 | 西安科技大学 | A kind of large scale that is applied to increases the two-way automatic power spreading mechanism that material manufactures forming machine |
| CN105170978A (en)* | 2015-09-11 | 2015-12-23 | 华中科技大学 | Hot isostatic pressing forming method for homogeneous sheath with gradient gradual change structure at connection interface |
| CN105127426A (en)* | 2015-09-30 | 2015-12-09 | 广西科技大学 | Three-dimensional structure combined sintering processing method |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107774996A (en)* | 2017-10-11 | 2018-03-09 | 华中科技大学 | A kind of integral forming method of the part of more material gradient lattice structures |
| CN109249022A (en)* | 2018-09-21 | 2019-01-22 | 华中科技大学 | A kind of double graded metal porous materials and preparation method thereof |
| CN109759588A (en)* | 2019-03-05 | 2019-05-17 | 上海汉邦联航激光科技有限公司 | A rapid additive manufacturing method for large bimetal parts |
| CN110091413A (en)* | 2019-05-14 | 2019-08-06 | 山东大学 | A kind of function-graded material 3D printing device and working method |
| CN110125399A (en)* | 2019-05-27 | 2019-08-16 | 上海交通大学 | Add more metal parts laser gain material manufacturing methods of transition zone |
| CN110625113A (en)* | 2019-08-27 | 2019-12-31 | 国营芜湖机械厂 | Rapid preparation method of airplane structure crack reinforcing part |
| CN110625113B (en)* | 2019-08-27 | 2021-11-05 | 国营芜湖机械厂 | Rapid preparation method of airplane structure crack reinforcing part |
| CN111618298A (en)* | 2020-04-30 | 2020-09-04 | 中北大学 | Efficient collaborative material increase manufacturing method for multi-material variable-stiffness structure |
| CN113894290A (en)* | 2021-09-03 | 2022-01-07 | 南方科技大学 | Preparation method of component failure controllable design and component |
| CN115338425A (en)* | 2022-08-19 | 2022-11-15 | 西安铂力特增材技术股份有限公司 | Complex shape part composite manufacturing method |
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| CN106623924B (en) | 2018-12-11 |
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| TR01 | Transfer of patent right | Effective date of registration:20190117 Address after:030051 Room 6319, 182 Building, College Road, Jiancao District, Taiyuan City, Shanxi Province Patentee after:Shanxi Zhongbei Science Park Co.,Ltd. Address before:030051 Xueyuan Road 3, pointed lawn area, Taiyuan, Shanxi Patentee before:NORTH University OF CHINA | |
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| TR01 | Transfer of patent right | Effective date of registration:20190123 Address after:030006 Taiyuan Comprehensive Reform Demonstration Zone, Taiyuan Xuefu Park, Shanxi Province, 529 South Central Street, Block D, 21 Floor 02, Cleaning and Control Innovation Base Patentee after:Shanxi Yangchen Zhongbei Technology Co.,Ltd. Address before:030051 Room 6319, 182 Building, College Road, Jiancao District, Taiyuan City, Shanxi Province Patentee before:Shanxi Zhongbei Science Park Co.,Ltd. Effective date of registration:20190123 Address after:030051 Room 6319, 182 Building, College Road, Jiancao District, Taiyuan City, Shanxi Province Patentee after:Shanxi Zhongbei Science Park Co.,Ltd. Address before:030051 Xueyuan Road 3, pointed lawn area, Taiyuan, Shanxi Patentee before:NORTH University OF CHINA |