35results about How to "Control temperature gradient" patented technology

The invention belongs to the technical field of tempered glass preparation methods, and particularly relates to a homogenization processing method for tempered glass and the tempered glass. The homogenization processing method for the tempered glass comprises the following steps: S1: providing a glass original sheet, and performing the cutting, edging and toughening treatment on the glass originalsheet; S2: performing the homogenization treatment on the glass original sheet, wherein a homogenization treatment process is formed by a temperature rising stage, a constant temperature stage and atemperature reducing stage; S3: setting a temperature rising rate in the temperature rising stage as 1.5 DEG C / s to 4 DEG C / s, setting a temperature in the constant temperature stage as 240 DEG C to 300 DEG C, wherein the duration time is 1.5 h to 2.5 h, and setting a temperature reducing rate in the temperature reducing stage as 0.02 DEG C / s to 0.04 DEG C / s; and S4: moving out the glass originalsheet of which the temperature is reduced to 60 DEG C to 70 DEG C from a homogenizing furnace and continuously cooling to a room temperature. The above method is capable of, through accurately limiting homogenization treatment technological parameters, effectively controlling a temperature gradient in the homogenizing furnace, and guaranteeing the quality of the tempered glass after the homogenization treatment.

The invention discloses an electron-beam floating zone smelting furnace and a smelting method. The electron-beam floating zone smelting furnace comprises a furnace body and an argon filled fast cooling system, a water cooling system and a high-vacuum unit which are matched with the furnace body, wherein the furnace body comprises an upper furnace chamber and a lower furnace chamber, and the upper furnace chamber and the lower furnace chamber are in longitudinal and sealed butt joint in a working state; a loading fixing device for fixing a material bar is fixedly mounted in the working area of the furnace body, the working area of the furnace body is provided with a ring-type electron gun, the ring-type electron gun is provided with an electron gun moving system, narrow-area melting of the raw material bar is achieved under high-energy heat, gas is separated out, impurities are evaporated and single crystals are generated in the whole complex physical and chemical process, and smelting is achieved.

The invention relates to a method for 3D printing metal materials with controllable temperature gradient in the solidification process. The steps are: 1) Establish the CAD model of metal material parts; 2) Select the processing technology; 3) Single-pass cladding experiment; 4) Model slicing and processing trajectory design; 5) Use finite element analysis software to simulate the temperature field in the processing process ;6) Divide the processing area; 7) Fit the temperature-time curve of the feature point; 8) Set the temperature gradient; 9) Solve the control signal of each resistance wire on the platform; 10) Laser 3D printing. The present invention can control the temperature gradient of the forming process in the processing process, obtain metal materials with low residual stress and good mechanical properties, and greatly save costs; the temperature gradient of the processing process can also be set according to requirements, so as to prepare metal materials in a directional manner .