Pearlitic rail treatment method
A technique for pearlitic rails and treatment methods, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of reducing the overall service life of rails, affecting the overall performance of rails, and uneven cooling rates, achieving good cooling rate uniformity, The effect of refining the interlamellar spacing of pearlite and reducing the probability of contact fatigue damage
Active Publication Date: 2021-01-22
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the performance of the rail is poor, and it is easy to generate large residual stress, which affects the straightness of the rail and increases the occurrence of contact fatigue damage probability, affect the overall performance of the rail, and reduce the overall service life of the rail
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] The present invention is further described below.
[0019] Pearlite rail processing method provided by the present invention comprises the following steps:
[0020] a. Heating the rolled pearlite rail through a heating device;
[0021] b. Straightening the pearlitic rail heated by the heating device through a high-temperature rail straightening machine;
[0022] c. Transport the straightened pearlite rail to the entrance of the heat treatment unit;
[0023] d. Put the pearlite rail into the heat treatment unit, and the temperature of the pearlite rail entering the heat treatment unit is between 760-900°C;
[0024] e. A cooling device is installed in the heat treatment unit, and the cooling device applies an accelerated cooling medium to the pearlite rail to reduce the temperature of the pearlite rail to 400-500°C, and stop applying the accelerated cooling medium after the temperature of the pearlite rail drops to 400-500°C. Pearlitic rails are cooled to room temperat...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| tensile strength | aaaaa | aaaaa |
| elongation | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses and relates to the technical field of metal heat treatment, and particularly relates to a treatment method of a pearlite steel rail. The treatment method of the pearlite steelrail comprises the following steps that a, the rolled pearlite steel rail is heated through a heating device; b, the pearlite steel rail is subjected to straightening treatment through a high-temperature steel rail straightener; c, the pearlite steel rail subjected to straightening treatment is conveyed to an inlet of a heat treatment unit; d, the pearlite steel rail enters the heat treatment unit; and e, a cooling device is arranged in the heat treatment unit and cools the pearlite steel rail in an accelerated manner. The pearlite steel rail subjected to secondary heating is subjected to straightening treatment through the high-temperature steel rail straightener, the flatness of the pearlite steel rail is obviously improved, the pearlite steel rail can come in and out of the heat treatment unit conveniently, and the production efficiency can be improved; and meanwhile, the comprehensive performance of the pearlite steel rail can be improved, the occurrence probability of contact fatigue damage of the pearlite steel rail can be reduced, the overall service life of the pearlite steel rail can be prolonged, and popularization is facilitated.
Description
technical field [0001] The invention relates to the technical field of metal heat treatment, in particular to a pearlite rail treatment method. Background technique [0002] At present, my country's railways are in a stage of rapid development. High-speed passenger railways, passenger-freight mixed railways, and heavy-duty freight railways are all undergoing rapid and large-scale construction, and the demand for steel rails is increasing. [0003] Pearlitic rails have good mechanical properties and contact fatigue resistance, and have a high service life, and are increasingly used. The production process of pearlitic steel rail is as follows: firstly, smelting by converter, LF refining, then RH vacuum treatment, continuous casting to obtain billet, and finally rolling and heat treatment for billet. At present, the rolled pearlitic rail is cooled by air cooling, the cooling rate is not uniform, the performance of the rail is poor, and it is easy to generate large residual st...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/04C21D6/00C22C38/02C22C38/04C22C38/24
CPCC21D6/002C21D6/005C21D6/008C21D9/0062C21D9/04C21D2211/009C22C38/002C22C38/02C22C38/04C22C38/24
Inventor 李若曦韩振宇邹明袁俊
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP