Bearing heat treatment skills and equipment (1)

Source: China Bearing Network Time: 2013-04-28

/*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';

First, the development trend of bearing heat treatment skills bearing heat treatment is directly related to the subsequent processing quality; resulting in the end of the impact of the use of parts and life; a bearing heat treatment is also a major power consumption in the bearing production and pollution. Bearing heat treatment equipment directly Affect the quality of bearing heat treatment; as well as power consumption and pollution. These years; follow the advancement of technology; the trend of heat treatment skills is mainly reflected in the following aspects:
(1) Wastewater, waste gas, waste salt, waste oil and electromagnetic radiation formed by heat treatment of sanitary heat treatment will cause environmental pollution. The environmental pollution problem of heat treatment is treated; the implementation of sanitary heat treatment (or green heat treatment) is the heat treatment skill development. One of the directions. This is a high requirement for heat treatment atmosphere, quenching oil and cleaning equipment.
(2) Fine heat treatment Fine heat treatment is sufficient to ensure the stability of the optimized process; the product quality dispersion is small (or zero), the heat treatment distortion is zero; the grinding residue is reduced to improve the production power; the data is saved. Excellent furnace temperature uniformity, temperature control accuracy; and excellent cooling and stability of the quenching agent. Complete fine heat treatment of the bearing can take the whole road of quenching and induction hardening.
(3) Energy-saving heat treatment Select new insulation materials to improve the power utilization rate of heat treatment equipment, optimize the heat treatment process, improve the process output value, and fully utilize the equipment's talents. At this stage, all bearing manufacturers are doing experiments in this area; for example, using waste heat Some manufacturers have used the residual heat of casting to spheroidize the bearing parts, and use a process with low energy consumption and short cycle to replace the process with long cycle and high energy consumption. The lower bainite quenching process must be in a certain extent and must range. Internally; a shorter bainite quenching process replaces the long cycle and high energy carburizing process.
(4) Less oxidation-free heat treatment is heated by controlled atmosphere heating instead of oxidizing atmosphere to control the carbon potential and nitrogen potential in a controlled atmosphere; the function of the parts after heat treatment is improved; heat treatment defects such as oxidation, decarburization and cracking are greatly reduced. ; reduction of finishing allowance after heat treatment; improved data utilization and machining power. Vacuum heating gas quenching, vacuum or low pressure carburizing, nitriding, nitrocarburizing and boronizing can significantly improve the quality of the workpiece; Cut distortion; improve life.
Second, bearing heat treatment equipment 1. Annealing equipment At present, the annealing equipment in China is the coexistence of oxidation furnace and atmosphere-maintaining furnace; the oxidation furnace is more than the atmosphere furnace, the cycle furnace and the continuous furnace coexist; and the cycle furnace is more than the continuous furnace. The United States, Britain, Japan and Other countries are as early as 20 Pusher-type and roller-bottom isothermal spheroidizing annealing furnaces have been fully implemented in the 1960s and 1970s; shortening the annealing cycle; saving power; and improving annealing quality. Following the development of bearing parts processing skills; and fine casting and fine expansion ( Cold rolling) process selection; the processing precision of the parts blank is getting higher and higher; thus, the need to maintain the atmosphere annealing. The bearing profession should be agile to promote the atmosphere spheroidizing annealing; to reduce the oxidative decarburization after annealing; Processing power; energy saving; reducing costs.

Recommend to friends comments close window

Bearing related knowledge

Rolling bearing preloading method Common terms and definitions for rolling bearings (5)
Common Terms and Definitions of Modern Large Rolling Mill Oil Film Bearing DF Sealing Skill Bearings (15)
The reason why the bearing has common defects in grinding

This article links to http://
Please indicate the bearing network http://

Previous:The harm of fake and inferior bearing to our next edition: Energy-saving heat treatment skills and equipment in the bearing profession

embossed stainless steel sheet

Stainless Steel Embossed Sheet,Stainless Embossed Steel,Embossed Steel Sheet

Hong-Steel Co., Ltd. , http://www.qiyistainlesssteel.com