Green short-process forged steel supporting roller preparation method
By using the tempering heat treatment method combined with actual production in the production of forged steel support rollers, the existing forged steel support rollers has solved the problems of complex production processes and large energy consumption, and the production process is simplified and the energy consumption is reduced, and the competitiveness of the products is improved.
Patent Information
- Application Number
- CN202411826136.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-03-28
AI Technical Summary
The existing forged steel bearing rollers have complex production processes, many production processes, long cycles, and large energy consumption, making it difficult to meet the country's requirements for the green development of industrial manufacturing.
The thermal treatment process of forged steel support roller blanks is studied by combining Deform simulation with actual production. Through the thermal treatment of tempering heat treatment and the annealing heat treatment and rough addition of tempering, the waste heat of forging is used to reduce the energy consumption of heat treatment, and the combined processing of rough and semi-finished trucks is realized.
The production process of forged steel support rollers is simplified, the production cycle is shortened, energy consumption and pollution emissions are reduced, the market competitiveness of the products is improved, and processing costs are reduced.
Smart Images
Figure CN119710147A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of roll preparation, in particular to a green short-process forged steel support roll preparation method. Background Art
[0002] Forged steel support rollers are used to support working rollers or intermediate rollers during the steel rolling process to prevent the working rollers from bending and deforming and affecting the output and quality of plates and strips. As an important component of the rolling mill, the support rollers must have high wear resistance, good anti-stripping and good accident resistance. Due to their high technical requirements, the production process is complex, the production process is multi-step, the cycle is long, and the energy consumption is relatively large. The original production process of forged steel support rollers is: forging blanks → annealing heat treatment → roughing → quenching and tempering heat treatment → semi-finishing turning → performance heat treatment → finished product processing.
[0003] In order to respond to the country's requirements for the green development of industrial manufacturing, it is necessary to develop a green short-process forged steel support roller preparation method to overcome the problems existing in the existing forged steel support roller production process. Summary of the invention
[0004] The technical problem to be solved by the present invention is to provide a green short-process forged steel support roller preparation method, which optimizes the production process and production technology of forged steel support rollers, has a simple production process, fewer production steps, a short cycle, and relatively low energy consumption.
[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A green short-process forged steel support roller tempering heat treatment method uses a combination of Deform simulation and actual production to study the tempering heat treatment process of forged steel support roller blanks. By comparing the blank tempering with the rough tempering, the temperature field inside the roller body will change. Using UG software, a 1:1 product model is established, and then the Deform simulation software is used to simulate the temperature field of the product during different heat treatment processes to study the tempering heat treatment process of forged steel support roller blanks. Specifically, the following steps are included: Step 1, the steel ingot is forged into a forged steel support roller blank; Step 2: After forging, the forged steel support roller blank is air-cooled. Step 3, after air cooling, wrap the two end surfaces of the roll neck of the forged steel backup roll blank with a protective layer; Step 4, placing the forged steel support roller blank wrapped with the protective layer into a heat treatment furnace for quenching and tempering heat treatment; Step 5, after the heat treatment, the forged steel support roller blank is first water-cooled, and then air-cooled; Step 6, tempering the air-cooled forged steel support roller blank; Step 7, after removing the protective layer from the tempered forged steel support roller blank, perform rough turning and semi-finishing turning to continuously produce the finished product.
[0006] A further improvement of the technical solution of the present invention is that in step 2, the air cooling time is 6-10 hours, so that the surface temperature of the forged steel support roller blank reaches 450-500°C.
[0007] A further improvement of the technical solution of the present invention is that in step 3, ceramic fibers and thin steel plates are used to wrap both end surfaces of the roll neck of the forged steel support roll blank.
[0008] A further improvement of the technical solution of the present invention is that in step 4, the tempering heat treatment specifically includes: after the forged steel support roller blank wrapped with a protective layer is loaded into a heat treatment furnace, the furnace temperature is adjusted to 600-700°C, and the first insulation is performed for 5-10 hours to evenly adjust the internal and external temperatures of the forged steel support roller blank, so that the core temperature of the roller body is reduced to below 700°C to complete the structural transformation; after the first insulation is completed, the temperature is increased to 930-980°C at a heating rate of 50-60°C / h to start the second insulation, and the second insulation time is 20-30 hours.
[0009] A further improvement of the technical solution of the present invention is that: in step 5, the forged steel support roller blank is hoisted into a water pool as a whole during water cooling, and the circulating water in the water pool is turned on to start water cooling, and the water cooling time is 100-150 minutes; after the water cooling is completed, the forged steel support roller blank is hoisted out of the water pool as a whole for air cooling, and the air cooling time is 10-15 hours.
[0010] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is: The present invention, in the conventional forged steel support roller production process, performs tempering heat treatment after the blank forging is completed, combines the original blank annealing heat treatment with the post-roughing tempering heat treatment into one, innovates the forged steel support roller tempering heat treatment process, can make full use of forging waste heat, reduce heat treatment energy consumption, and realize rough turning and semi-finishing turning combined processing after hot processing, thereby reducing processing costs, shortening the forged steel support roller production process, shortening the production preparation cycle, reducing pollution emissions, and improving product market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 It is a flow chart of a green short-process forged steel support roller preparation method provided in an embodiment of the present invention; Figure 2 is a schematic diagram of roll neck protection in an embodiment of the present invention; Among them, 1. Forged steel support roller blank; 2. Protective layer. DETAILED DESCRIPTION
[0012] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or apparatus.
[0013] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0014] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0015] The present invention is further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1 , 2 As shown, a green short-process forged steel support roller preparation method comprises the following steps: Step 1, the steel ingot is forged into a forged steel support roller blank 1; Step 2, air-cooling the forged steel backup roller blank 1 after forging, the air-cooling time is 6-10 hours, so that the surface temperature of the forged steel backup roller blank 1 reaches 450-500° C.; Step 3, after air cooling, the two end surfaces of the roll neck of the forged steel support roll blank 1 are wrapped with a protective layer 2 using ceramic fiber and a thin steel plate; Step 4, placing the forged steel support roller blank 1 wrapped with the protective layer 2 into a heat treatment furnace for quenching and tempering heat treatment; The quenching and tempering heat treatment specifically includes: after the forged steel support roller blank 1 wrapped with the protective layer 2 is loaded into the heat treatment furnace, the furnace temperature is adjusted to 600-700°C, and the first heat preservation is carried out for 5-10 hours, the internal and external temperatures of the forged steel support roller blank 1 are uniformed, and the temperature of the core of the roller body is reduced to below 700°C to complete the structural transformation; after the first heat preservation is completed, the temperature is increased to 930-980°C at a heating rate of 50-60°C / h to start the second heat preservation, and the second heat preservation time is 20-30 hours; Step 5, after the heat treatment, the forged steel support roller blank 1 is first water-cooled, and then air-cooled; during water cooling, the forged steel support roller blank 1 is hoisted into a water pool as a whole, and the circulating water in the water pool is turned on to start water cooling, and the water cooling time is 100-150 minutes; after the water cooling is completed, the forged steel support roller blank 1 is hoisted out of the water pool as a whole for air cooling, and the air cooling time is 10-15 hours; Step 6, tempering the air-cooled forged steel support roller blank; Step 7, after removing the protective layer from the tempered forged steel support roller blank, perform rough turning and semi-finishing turning to continuously produce the finished product.
[0016] Example 1 A green short-process forged steel support roller preparation method comprises: a steel ingot is forged into a forged steel support roller blank with a roller body diameter of Φ1000mm, air-cooled for 6 hours after forging, the surface temperature of the roller blank is reduced to 450°C, both end surfaces of the roller neck are wrapped with ceramic fiber and thin steel plate and then loaded into a furnace, the temperature is set at 600°C in the furnace, the temperature is averaged for 5 hours, the temperature is increased to 930°C at 60°C / h, the temperature is kept for 20 hours and then taken out of the furnace for cooling, water-cooled for 100 minutes, air-cooled for 10 hours and then loaded into the furnace for tempering, the protective layer of the tempered forged steel support roller blank is removed, and then rough turning and semi-finishing turning are carried out to continuously produce the finished product.
[0017] After the product process of forged steel support rollers of this specification was optimized, the production cycle was shortened by 180 hours and the cost per ton was reduced by 400 yuan.
[0018] Example 2 A green short-process forged steel support roller preparation method comprises: a steel ingot is forged into a forged steel support roller blank with a roller body diameter of Φ1300mm, air-cooled for 8 hours after forging, the surface temperature of the roller blank is reduced to 470°C, both end surfaces of the roller neck are wrapped with ceramic fiber and thin steel plate and then loaded into a furnace, the temperature is set at 650°C in the furnace, the temperature is averaged for 8 hours, the temperature is increased to 940°C at 60°C / h, the temperature is kept for 24 hours and then taken out of the furnace for cooling, water-cooled for 130 minutes, air-cooled for 13 hours and loaded into the furnace for tempering, the protective layer of the tempered forged steel support roller blank is removed, and then rough turning and semi-finishing turning are carried out to continuously produce the finished product.
[0019] After the product process of forged steel support rollers of this specification was optimized, the production cycle was shortened by 190 hours and the cost per ton was reduced by 420 yuan.
[0020] Example 3 A green short-process forged steel support roller preparation method comprises: a steel ingot is forged into a forged steel support roller blank with a roller body diameter of Φ1600mm, air-cooled for 10 hours after forging, the surface temperature of the roller blank is reduced to 480°C, both end surfaces of the roller neck are wrapped with ceramic fiber and thin steel plate and then loaded into a furnace, the temperature is set at 680°C in the furnace, the temperature is averaged for 10 hours, the temperature is increased to 960°C at 50°C / h, the temperature is kept for 30 hours and then taken out of the furnace for cooling, water-cooled for 140 minutes, air-cooled for 15 hours and loaded into the furnace for tempering, the protective layer of the tempered forged steel support roller blank is removed, and then rough turning and semi-finishing turning are carried out to continuously produce the finished product.
[0021] After the product process of forged steel support rollers of this specification was optimized, the production cycle was shortened by 200 hours and the cost per ton was reduced by 430 yuan.
[0022] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A green short-process forged steel support roller preparation method, characterized in that: The following steps are involved: Step 1, the steel ingot is forged into a forged steel support roller blank; Step 2: After forging, the forged steel support roller blank is air-cooled. Step 3, after air cooling, wrap the two end surfaces of the roll neck of the forged steel backup roll blank with a protective layer; Step 4, placing the forged steel support roller blank wrapped with the protective layer into a heat treatment furnace for quenching and tempering heat treatment; Step 5, after the heat treatment, the forged steel support roller blank is first water-cooled, and then air-cooled; Step 6, tempering the air-cooled forged steel support roller blank; Step 7, after removing the protective layer from the tempered forged steel support roller blank, perform rough turning and semi-finishing turning to continuously produce the finished product.
2. The green short-process forged steel support roller preparation method according to claim 1 is characterized in that: In step 2, the air cooling time is 6-10 hours, so that the surface temperature of the forged steel backup roller blank reaches 450-500°C.
3. The green short-process forged steel support roller preparation method according to claim 1, characterized in that: In step 3, both end surfaces of the roll neck of the forged steel backup roll blank are wrapped with ceramic fibers and thin steel plates.
4. The green short-process forged steel support roller preparation method according to claim 1, characterized in that: In step 4, the tempering heat treatment specifically includes: after the forged steel support roller blank wrapped with the protective layer is loaded into the heat treatment furnace, the furnace temperature is adjusted to 600-700°C, and the first insulation is carried out for 5-10 hours to evenly adjust the internal and external temperatures of the forged steel support roller blank, so that the core temperature of the roller body is reduced to below 700°C to complete the structural transformation; after the first insulation is completed, the temperature is increased to 930-980°C at a heating rate of 50-60°C / h to start the second insulation, and the second insulation time is 20-30 hours.
5. The green short-process forged steel support roller preparation method according to claim 1, characterized in that: In step 5, during water cooling, the forged steel support roller blank is hoisted into the water pool as a whole, and the circulating water in the water pool is turned on to start water cooling, and the water cooling time is 100-150 minutes; after the water cooling is completed, the forged steel support roller blank is hoisted out of the water pool as a whole for air cooling, and the air cooling time is 10-15 hours.