摘要：【中文】本发明属于粉体制备技术领域，具体涉及一种铁包硅核壳复合粉末的制备方法。本发明基于溶胶凝胶原理，将丙烯酰胺单体和N，N’‑亚甲基双丙烯酰胺交联剂预混液与可溶性铁盐溶液混合均匀，将硅粉加至混合液中，强力搅拌以实现硅粉在混合液中均匀分散，随后向其中加入过硫酸铵溶液催化形成凝胶坯体，经氢气高温还原获得铁包硅核壳复合粉末。本发明能够实现硅颗粒表面均匀包覆铁，避免高硬度硅颗粒对粉末成形产生的不利影响，且硅/铁质量比可调可控，为高硅钢等粉末冶金制品提供优质粉末原料。 【EN】The invention belongs to the technical field of powder preparation, and particularly relates to a preparation method of iron-coated silicon core-shell composite powder. The preparation method is based on the sol-gel principle, acrylamide monomer and N, N' -methylene bisacrylamide crosslinking agent premixed solution and soluble iron salt solution are uniformly mixed, silicon powder is added into the mixed solution, strong stirring is carried out to realize uniform dispersion of the silicon powder in the mixed solution, then ammonium persulfate solution is added into the mixed solution to form a gel blank body through catalysis, and the iron-coated silicon core-shell composite powder is obtained through hydrogen high-temperature reduction. The invention can realize that the surface of the silicon particles is uniformly coated with iron, avoids the adverse effect of high-hardness silicon particles on powder forming, has adjustable and controllable silicon/iron mass ratio and provides high-quality powder raw materials for powder metallurgy products such as high-silicon steel and the like.

摘要：【中文】本发明提供了一种激光选区固化金属的3D打印方法，属于3D打印成形技术领域。首先将金属粉末与液态光敏树脂混合，然后在该浆料中添加分散剂调节浆料的流变性能，制备成具有适当固相体积分数且流变性能良好的光敏浆料。利用3D打印装置将浆料从一定直径的喷嘴中挤压出来；同时，在浆料流线挤出分散累积的过程中，采用精细的激光束选区同步扫描到浆料流线平面上，使其局部快速固化成形，循环往复，从而可以实现一定形状的金属零件的成形。本发明能够直接成形高精度的金属零件，成形速度快，零件强度高，密度均匀，成本低廉，对工作环境没有特殊要求。 【EN】The invention provides a 3D printing method for laser selective solidification metal, and belongs to the technical field of 3D printing forming. Firstly, metal powder and liquid photosensitive resin are mixed, then a dispersing agent is added into the slurry to adjust the rheological property of the slurry, and the photosensitive slurry with proper solid phase volume fraction and good rheological property is prepared. Extruding the slurry from a nozzle with a certain diameter by using a 3D printing device; meanwhile, in the process of extruding, dispersing and accumulating the slurry streamline, a fine laser beam is adopted to select regions and synchronously scan the slurry streamline plane, so that the slurry streamline plane is locally and rapidly solidified and formed and is circularly reciprocated, and the forming of a metal part with a certain shape can be realized. The invention can directly form high-precision metal parts, and has the advantages of high forming speed, high part strength, uniform density, low cost and no special requirement on working environment.

摘要：【中文】本发明公开了一种用于模具的材料粉末，所述材料粉末采用水气联合雾化工艺制备，粉末成分质量百分比如下：C为0.2%~0.6%，Cr为5%~6%，V为6%~12%，Mo为1%~2%，剩余量为Fe。本发明还公开了一种模具材料制备方法，使用上述粉末；采用分解氨气氛进行粉末预处理；将预处理后粉末用压制成型或冷等静压成型，得成型后坯料；将成型后坯料进行预烧结处理；预烧结后用无包套热等静压致密化或用小变形量锻造致密化。本模具材料晶粒细小、碳化物均匀，可提升模具的耐磨性、耐高温性，致密度高，从而能增强模具的疲劳性能；另外本模具材料制备方法可减少锻造次数，缩短工艺流程，采用无包套热等静压时可降低工艺成本。 【EN】The invention discloses material powder for a die, which is prepared by adopting a water-gas combined atomization process, and comprises the following components in percentage by mass: 0.2-0.6% of C, 5-6% of Cr, 6-12% of V, 1-2% of Mo and the balance of Fe. The invention also discloses a preparation method of the die material, which uses the powder; performing powder pretreatment in an ammonia decomposition atmosphere; pressing or cold isostatic pressing the pretreated powder to obtain a formed blank; pre-sintering the formed blank; after pre-sintering, densification is carried out by hot isostatic pressing without a sheath or by forging with a small deformation. The die material has fine grains and uniform carbide, can improve the wear resistance and high temperature resistance of the die, and has high density, thereby enhancing the fatigue performance of the die; in addition, the preparation method of the die material can reduce the forging times, shorten the process flow and reduce the process cost when the non-sheath hot isostatic pressing is adopted.

摘要：【中文】本发明公开了一种利用活性炭防止熔盐相变储热材料流失的方法，属于相变储热材料领域。该方法包括以下步骤：(1)制备熔盐颗粒；(2)活性炭吸附熔盐相变材料；(3)对试样进行混合压制烧结。本发明采用活性炭吸附熔盐相变材料，基于稳定相变储热材料制备方法，利用压制与造粒法制备熔盐大颗粒，并采用活性炭对熔盐大颗粒进行吸附，最后将吸附熔盐相变材料的活性炭粉体与粘结剂混合压制烧结，即得复合相变储热体。该制备方法简单，成本低廉且适宜大规模生产，不但解决了熔盐相变材料在使用过程中易流失问题，而且使用周期长、力学性能优良，对扩大相变储热材料的使用具有重要意义。 【EN】The invention discloses a method for preventing loss of a molten salt phase change heat storage material by using activated carbon, and belongs to the field of phase change heat storage materials. The method comprises the following steps: (1) preparing molten salt particles; (2) adsorbing a molten salt phase change material by using activated carbon; (3) and (5) carrying out mixed pressing and sintering on the sample. According to the invention, the activated carbon is adopted to adsorb the molten salt phase change material, based on the preparation method of the stable phase change heat storage material, the pressing and granulation method is utilized to prepare the molten salt large particles, the activated carbon is adopted to adsorb the molten salt large particles, and finally, the activated carbon powder adsorbing the molten salt phase change material is mixed with the binder to be pressed and sintered, so that the composite phase change heat storage body is obtained. The preparation method is simple, low in cost and suitable for large-scale production, not only solves the problem that the fused salt phase-change material is easy to run off in the using process, but also has long service cycle and excellent mechanical property, and has important significance for expanding the use of the phase-change heat storage material.

摘要：【中文】一种固相除氧制备高性能粉末冶金钛及钛合金的方法，属于粉末冶金钛领域。本发明提出将TiCl₂作为钛粉末除氧剂，将TiCl₂与钛粉末混合均匀，经成形—烧结，获得高性能钛制品。在烧结过程中，TiCl₂与钛粉末及表面的氧化膜发生氧化还原反应，生成TiCl_xO_y以气态的形式脱除钛基体，不会产生固相杂质颗粒，避免引入第二相阻碍烧结，且TiCl_xO_y有利于破除粉末表面氧化膜，从而提高钛粉末的烧结活性，促进致密化烧结，从而获得低氧高致密度的钛制品，且兼具优异的综合力学性能。本发明为粉末冶金钛及钛合金除氧提供新的思路，有利于推动低成本粉末冶金钛及钛合金产业化发展。 【EN】A method for preparing high-performance powder metallurgy titanium and titanium alloy by solid-phase deoxidization belongs to the field of powder metallurgy titanium. The invention provides a method for preparing TiCl₂As titanium powder oxygen scavenger, TiCl is used₂Mixing with titanium powder, shaping and sintering to obtain high-performance titanium product. In the sintering process, TiCl₂Oxidation-reduction reaction is carried out on the titanium powder and the oxide film on the surface to generate TiCl_xO_yThe titanium matrix is removed in a gaseous form without producing solid phase impurity particles, without introducing a second phase to hinder sintering, and TiCl_xO_yThe method is favorable for breaking oxide films on the surfaces of the titanium powder, thereby improving the sintering activity of the titanium powder and promoting densification sintering, so that the titanium product with low oxygen and high density is obtained, and the titanium product has excellent comprehensive mechanical properties. The method provides a new idea for deoxidizing the powder metallurgy titanium and the titanium alloy, and is beneficial to promoting the industrial development of the low-cost powder metallurgy titanium and the titanium alloy.

摘要：【中文】一种制备低氧高质量氢化脱氢钛粉的方法，属于粉末冶金钛领域。本发明以海绵钛、废钛、钛屑或残钛边角料等为原料，经氢化脱氢后，加入TiCl₂作为除氧剂，将TiCl₂和钛粉混合均匀后进行退火处理，使得TiCl₂与氢化脱氢钛粉及粉末表面的氧化膜发生氧化还原反应，生成气态TiCl_xO_y，使氧从钛粉中脱除，达到大幅度降低钛粉氧含量、净化粉末的作用。此外，TiCl₂的加入并不会引入其他杂质改变钛粉的特性。本发明制备工艺简单，无需额外设备，除氧剂价格低廉，有利于高质量低成本钛粉的制备，并且大大提高了残钛的回收利用率，对钛产业的低成本制备及绿色可循环生成具有重大意义。 【EN】A method for preparing low-oxygen high-quality hydrogenated and dehydrogenated titanium powder belongs to the field of powder metallurgy titanium. The invention takes sponge titanium, waste titanium, titanium scraps or leftover bits and pieces of residual titanium and the like as raw materials, and after hydrogenation and dehydrogenation, TiCl is added₂As oxygen scavenger, TiCl₂Uniformly mixing with titanium powder, and annealing to obtain TiCl₂Carrying out oxidation-reduction reaction with hydrogenated and dehydrogenated titanium powder and an oxide film on the surface of the powder to generate gaseous TiCl_xO_ySo as to remove oxygen from the titanium powder, thereby achieving the effects of greatly reducing the oxygen content of the titanium powder and purifying the powder. In addition, TiCl₂The addition of the titanium powder does not introduce other impurities to change the characteristics of the titanium powder. The preparation method disclosed by the invention is simple in preparation process, does not need additional equipment, is low in price of the deoxidant, is beneficial to the preparation of high-quality low-cost titanium powder, greatly improves the recovery and utilization rate of residual titanium, and has great significance for low-cost preparation and green recyclable generation of the titanium industry.

摘要：【中文】一种通过粉末压烧制备高硅钢薄片的方法，属于粉末冶金技术领域。本发明以气雾化的Fe‑6.5wt.％Si粉为原料，通过粉末预置使粉末处于压实状态，并放于真空烧结炉中经高温烧结使其冶金结合，经多道次热轧至一定厚度后再经1‑4次冷轧，最后在高温下进行退火得到具有优良性能的高硅钢薄片。相较于采用水雾化粉末，本发明采用气雾化的高硅钢粉末极大地减少了合金体系的氧化物夹杂。同时，采用直接压烧的方法越过了球形的气雾化粉末难以成形的问题，从而避免了因添加成形剂导致的工艺复杂性及后续的脱胶、残碳问题，具有操作简单、生产效率高、产品精度高、工艺流程短、无污染与夹杂、性能优异等优点。 【EN】A method for preparing high silicon steel sheets by powder pressing firing belongs to the technical field of powder metallurgy. The method takes gas atomized Fe-6.5 wt.% Si powder as a raw material, the powder is in a compacted state through powder presetting, the compacted powder is placed in a vacuum sintering furnace to be metallurgically bonded through high-temperature sintering, the sintered powder is subjected to multi-pass hot rolling to a certain thickness and then to 1-4 times of cold rolling, and finally the high-silicon steel sheet with excellent performance is obtained through annealing at high temperature. Compared with the method adopting water atomized powder, the method adopting gas atomized high silicon steel powder greatly reduces oxide inclusions in an alloy system. Meanwhile, the problem that spherical gas atomization powder is difficult to form is overcome by adopting a direct pressure sintering method, so that the process complexity caused by adding a forming agent and the subsequent problems of degumming and carbon residue are avoided, and the method has the advantages of simplicity in operation, high production efficiency, high product precision, short process flow, no pollution and impurities, excellent performance and the like.

摘要：【中文】一种金属卤化物净化颗粒表面制备高性能钛及钛合金的方法，属于粉末冶金钛领域。本发明将提出了采用金属卤化物作为表面净化剂，将金属卤化物包覆在钛粉末表面，经成形烧结，最后制得高性能钛制品部件。本发明中金属卤化物与Ti及钛氧化膜发生氧化还原反应，在氧化膜扩散之前，有效去除钛粉末表面氧化膜，起到控制钛金属基体中的氧含量增加的效果；同时，活化钛粉末表面，有利于提高烧结动力促进密度提高，从而获得高性能钛及钛合金。净化产物的金属元素可进一步与钛固溶，进一步提高钛及钛合金的综合性能。本发明具有生产成本低、制备工艺简单、工艺适用性大、可大规模工业化生产等特点。 【EN】A method for preparing high-performance titanium and titanium alloy on the surface of metal halide purification particles belongs to the field of powder metallurgy titanium. The invention provides a method for preparing a high-performance titanium product component by adopting metal halide as a surface purifying agent, coating the metal halide on the surface of titanium powder, forming and sintering. According to the invention, the metal halide, Ti and the titanium oxide film are subjected to oxidation-reduction reaction, and the oxide film on the surface of the titanium powder is effectively removed before the oxide film is diffused, so that the effect of controlling the increase of the oxygen content in the titanium metal matrix is achieved; meanwhile, the surface of the titanium powder is activated, which is beneficial to improving the sintering power and promoting the density to be improved, thereby obtaining high-performance titanium and titanium alloy. The metal elements of the purified product can be further dissolved with titanium in a solid manner, so that the comprehensive performance of the titanium and the titanium alloy is further improved. The invention has the characteristics of low production cost, simple preparation process, large process applicability, large-scale industrial production and the like.

摘要：【中文】一种氧化物弥散强化(ODS)钛及钛合金的制备方法，属于粉末冶金钛领域。本发明将钙铝合金(CaAl)粉末与钛粉末按照比例混合，随后进行冷等静压成型和真空无压烧结，得到氧化物弥散强化的钛及钛合金。本发明的优点在于：通过添加CaAl合金粉末在钛合金中引入Ca和Al元素，Ca在基体中均匀分布，在烧结过程中原位生成弥散分布的细小的Ca‑Ti‑O氧化物第二相颗粒；同时，Al元素固溶到钛基体中，形成TiAl固溶体，从而大幅度提高钛合金的力学性能。本发明为高性能钛及钛合金的制备提高控氧、性能调控的新思路，对钛及钛合金粉末原料的氧含量要求降低，具有低成本、工艺简单、操作简单、适合工业化生产等特点。 【EN】A preparation method of Oxide Dispersion Strengthened (ODS) titanium and titanium alloy belongs to the field of powder metallurgy titanium. The invention mixes calcium-aluminum alloy (CaAl) powder and titanium powder according to proportion, then carries out cold isostatic pressing forming and vacuum pressureless sintering to obtain the oxide dispersion strengthened titanium and titanium alloy. The invention has the advantages that: ca and Al elements are introduced into the titanium alloy by adding CaAl alloy powder, the Ca is uniformly distributed in a matrix, and fine Ca-Ti-O oxide second-phase particles which are dispersed and distributed are generated in situ in the sintering process; meanwhile, Al element is dissolved in the titanium matrix in a solid solution manner to form a TiAl solid solution, so that the mechanical property of the titanium alloy is greatly improved. The invention is a new idea of improving oxygen control and performance regulation and control in the preparation of high-performance titanium and titanium alloy, reduces the requirement on the oxygen content of the titanium and titanium alloy powder raw material, and has the characteristics of low cost, simple process, simple operation, suitability for industrial production and the like.