Decarbonization treatment technology for nut clamps
A treatment process and nut clip technology, applied in the field of decarburization treatment of nut clips, can solve the problems of easy fracture, product surface oxidation, difficult electroplating, etc., and achieve the effects of not easy brittle cracking, high hardness and good toughness
Inactive Publication Date: 2016-09-21
中山市恒发金属热处理有限公司
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Problems solved by technology
[0002] The conventional heat treatment of the nut clamp is preheating at 780°C, holding at 830°C for 25 minutes, and quenching at 820°C. There is basically no change. The hardness of the product after quenching is greater than or equal to 800, and the hardness of the product after tempering at 550°C is 330. The hardness of the product can meet the needs of customers, but the surface of the product is very serious. The products are easy to break, and there are potential safety hazards in use
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[0014] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0015] Such as figure 1 As shown, the decarburization treatment process of the nut clip of the present embodiment comprises steps:
[0016] A, preheating treatment at 780°C in the quenching furnace, the preferred preheating time is 6 minutes;
[0017] B, heat preservation at 830°C for 25 minutes in the quenching furnace;
[0018] C. Quenching treatment at 820°C. During quenching, methanol is used to generate protective gas under high temperature, and 5 flow tubes are used. The unit flow rate of each flow tube is 15ml / min, while the amount of methanol used traditionally is 25ml / min. min, 5 flow tubes, so in the present embodiment, the methanol consumption saved per hour is (25-15)*5*60=3000ml;
[0019] D. Tempering treatment at 510°C to 520°C, the tempering time is 60 minutes, while the traditional tempering temperature is 540°C to 550°C, an...
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Abstract
The invention provides a decarbonization treatment technology for nut clamps. The technology comprises steps as follows: A, preheating treatment is performed in a quenching furnace at the temperature of 780 DEG C; B, the temperature is kept at 830 DEG C in the quenching furnace for 25 min; C, quenching treatment is performed at the temperature of 820 DEG C, wherein a shielding gas is produced by the aid of methyl alcohol under the action of the high temperature during quenching, five flow tubes are adopted, and each flow tube has the unit flow being 15 ml / min; D, tempering treatment is performed at the temperature ranging from 510 DEG C to 520 DEG C for 60 min. With the adoption of the decarbonization treatment technology for the nut clamps, the consumption of methyl alcohol during quenching is reduced, the tempering temperature is reduced, and the tempering time is shortened, so that electric energy is saved, certain decarbonization layers exist on surfaces of products, and the electroplating quality is guaranteed.
Description
technical field [0001] The invention relates to the technical field of quenching nut clips, in particular to a decarburization treatment process for nut clips. Background technique [0002] The conventional heat treatment of the nut clamp is preheating at 780°C, holding at 830°C for 25 minutes, and quenching at 820°C. There is basically no change. The hardness of the product after quenching is greater than or equal to 800, and the hardness of the product after tempering at 550°C is 330. The hardness of the product can meet the needs of customers, but the surface of the product is very serious. The products are easy to break, and there are potential safety hazards in use. [0003] Therefore, it is necessary to provide a decarburization treatment process for nut clips to solve the above technical problems. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a decarburization treatment process for nut clamps. By contr...
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IPC IPC(8): C21D1/18C21D1/74C21D9/00C21D3/04
CPCC21D1/18C21D1/74C21D3/04C21D9/0068
Inventor 雷友云雷友平周新岩易和岗
Owner 中山市恒发金属热处理有限公司