Soaking type fine shaft local over conventional flame quenching method and device
A technology of flame quenching and thin shafts, which is applied in the direction of quenching devices, furnaces, heat treatment equipment, etc., and can solve the problems of inability to realize local quenching of thin shafts, small volume of heating parts, and difficulty in controlling the length of quenching parts
Inactive Publication Date: 2005-08-31
RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND
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Problems solved by technology
Due to the small diameter of the shaft and the local quenching of small size (the length of the quenching part is generally about 2.8mm), it is difficult to control the length of the quenching part if the quenching method of the conventional heating furnace is used, and the process time of quenching after heating is not easy to control. The parts are small in size and fast in heat dissipation, resulting in large differences in quenching temperature and extremely unstable hardness values
Conventional flame heating cannot meet the requirements of partial quenching of thin shafts
In addition, for the local quenching of thin shafts, there are existing quenching methods using high-energy laser and high-frequency heating in the world. However, due to the unsatisfactory accuracy of the equipment, the quenching hardness value often exceeds the required hardness value range, and the length of the quenched part is inconsistent. , and because of the complex technical conditions and high cost of these methods, it is difficult to be widely used
Method used
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[0016] Such as figure 1 , figure 2 As shown, the submerged flame automatic quenching device includes a water tank, a quenching executive assembly, a quenching piece lifting device and a control circuit. The quenching executive assembly includes a flame nozzle 2 placed above the liquid surface of the water tank and several support rods 1 placed below the liquid surface. The end of the pole is hinged on the main shaft 3, the main shaft is connected with the transmission shaft of the motor 8 at the bottom of the water tank, which can drive the pole 1 to rotate together with the motor 8, and the bottom of the pole 1 is provided with a ring bracket 10, and the middle part of the pole 1 is placed in a ring In the vertical guide groove of the support 10, the annular support 10 and the pole 1 rotate synchronously. The front part of the pole is provided with an elastic fixed sleeve, and the quenching part 4 (i.e. thin shaft) is installed in the fixed sleeve at the front part of the p...
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An immersed hypernormal flame quenching apparatus for local quenching of fine axle is composed of water tank, quenching executing unit consisting of flame nozzle above water surface and several supporting rods, the workpiece lifting unit consisting of lever-type rockerarm and electromagnet, and control circuit. Said supporting rods are hinged to mainshaft driven by motor. Its advantages are high efficiency and quality and low cost.
Description
technical field [0001] The invention relates to a quenching method and device, in particular to a method and device suitable for local flame quenching of thin shafts. Background technique [0002] In the thin shafts used in some industrial production (the shaft diameter is generally about 1.2mm), the end entity has a super-conventional heat treatment hardness value. Due to the small diameter of the shaft and the local quenching of small size (the length of the quenching part is generally about 2.8mm), it is difficult to control the length of the quenching part if the quenching method of the conventional heating furnace is used, and the process time of quenching after heating is not easy to control. The parts are small in size and fast in heat dissipation, resulting in large differences in quenching temperature and extremely unstable hardness values. Conventional flame heating cannot achieve the requirement of partial quenching of thin shafts. In additi...
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IPC IPC(8): C21D1/62C21D9/28
Inventor 李永璨李辉柴德明周润锋张建明张琪王贵友朱兆煜刘仲华李健
Owner RES INST OF PHYSICAL & CHEM ENG OF NUCLEAR IND