22MNB5 rolling method of cold rolling mill

Abstract

The invention discloses a 22MNB5 rolling method of a cold rolling mill, which is characterized in that the surface of a product is flat and smooth and has no obvious defects through reasonable rolling reduction and unit tension control; through scientific rolling parameter setting, the product has excellent mechanical properties while meeting the thickness requirement, and can bear high stress and deformation; according to the rolling method, the technological process is simplified, the production efficiency is improved, and the production cost is reduced. According to the 22MNB5 rolling method of the cold rolling mill, by optimizing rolling parameters and controlling the process, the surface quality and the mechanical property of a product are remarkably improved, and the method has wide application prospects and commercial value.

Description

Technical Field

[0001] The invention belongs to the field of rolling technology of metal materials, and in particular relates to a cold rolling mill 22MNB5 rolling method. Background Art

[0002] 22MNB5 steel is a high-strength low-alloy steel with good mechanical properties and weldability, and is widely used in automobile manufacturing, mechanical engineering and other fields. How to control the rolling parameters during the cold rolling process to ensure that the final product of 22MNB5 steel has excellent surface quality and mechanical properties is an important research topic in the current technical field. Summary of the invention

[0003] The purpose of the present invention is to provide a cold rolling mill 22MNB5 rolling method, which optimizes rolling parameters so that the product has excellent surface quality and mechanical properties.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention provides a cold rolling mill 22MNB5 rolling method, comprising the following steps:

[0006] 1). Raw material preparation

[0007] Select 22MNB5 steel raw materials that meet the standards;

[0008] 2.) Determination of rolling process parameters

[0009] According to the characteristics of raw materials, determine reasonable rolling process parameters to ensure uniform deformation and surface quality of materials during rolling;

[0010] 3). Rolling steps

[0011] Total reduction rate 57.2%: The raw materials are rolled in multiple passes, and the total reduction rate is controlled at 57.2%;

[0012] F1 stand presses down 20%: during the first rolling process, the material thickness is reduced by 20%;

[0013] F2 stand presses down 20.3%: During the second rolling process, the material thickness is reduced by 20.3%;

[0014] F3 stand presses down 20.2%: During the third rolling process, the material thickness is reduced by 20.2%;

[0015] F4 stand presses down 14.7%: During the fourth rolling process, the material thickness is reduced by 14.7%;

[0016] F5 stand 1.5% reduction: During the last rolling process, the material thickness is reduced by 1.5% to ensure the final thickness and surface flatness;

[0017] 4).Unit tension control

[0018] During the rolling process, the unit tension of each stand is controlled. The specific parameters are as follows:

[0019] F1 frame: 5.1(10N / mm 2 );

[0020] F2 frame: 13(10N / mm 2 );

[0021] F3 frame: 13.5(10N / mm 2 );

[0022] F4 frame: 14.5(10N / mm 2 );

[0023] F5 frame: 15.4 (10N / mm 2 );

[0024] Discharge end: 5.2(10N / mm 2 );

[0025] 5). Working roll bending control

[0026] To ensure flatness during rolling, the working roll and bending roll use a bending force of 18-21 (10KN / ch);

[0027] 6). Rolling force control

[0028] On different rolling stands, the rolling force is controlled, and the specific parameters are as follows:

[0029] F1 frame: 1400 tons;

[0030] F2 frame: 1450 tons;

[0031] F3 frame: 1350 tons;

[0032] F4 frame: 1250 tons;

[0033] F5 frame: 550 tons.

[0034] Furthermore, the step 1) also includes: pre-treating the selected 22MNB5 steel raw material, including surface cleaning, preheating and other steps, to ensure the uniformity and stability of the material during the rolling process.

[0035] Furthermore, during the rolling process, the thickness, surface quality and mechanical properties of the material are monitored in real time to ensure that the material meets the expected technical requirements after each rolling process.

[0036] Furthermore, after rolling, the finished product is subjected to surface treatment and quality inspection to ensure that the finished product meets relevant standards and user requirements.

[0037] Furthermore, the rolling method simplifies the process flow, improves production efficiency and reduces production costs.

[0038] Compared with the prior art, the beneficial technical effects of the present invention are:

[0039] The cold rolling mill 22MNB5 rolling method provided by the present invention significantly improves the surface quality and mechanical properties of the product by optimizing rolling parameters and process control, and has the following advantages:

[0040] 1. Excellent surface quality

[0041] Through reasonable control of pressing amount and unit tension, the product surface is flat and smooth without obvious defects.

[0042] 2.Stable mechanical properties

[0043] Through scientific rolling parameter setting, the product can meet the thickness requirements while having excellent mechanical properties and being able to withstand higher stress and deformation.

[0044] 3. High production efficiency

[0045] The rolling method of the invention simplifies the process flow, improves production efficiency and reduces production cost.

[0046] The cold rolling mill 22MNB5 rolling method of the present invention significantly improves the surface quality and mechanical properties of products by optimizing rolling parameters and process control, and has broad application prospects and commercial value. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The present invention will be further described below in conjunction with the accompanying drawings.

[0048] Figure 1 This is an icon of the actual parameters of the rolling mill for rolling this type of steel. The above icon can effectively reflect the practicability of this rolling method.

[0049] Figure 2 It is the mathematical model icon of the rolling data of the rolling mill 22MNB5. The above icon can effectively reflect the calculation process and reduction distribution ratio of this rolling method. DETAILED DESCRIPTION

[0050] A cold rolling mill 22MNB5 rolling method, comprising the following steps:

[0051] 1. Raw material preparation

[0052] Select 22MNB5 steel raw materials that meet the standards.

[0053] 2. Determination of rolling process parameters

[0054] According to the characteristics of raw materials, reasonable rolling process parameters are determined to ensure uniform deformation and surface quality of the material during the rolling process.

[0055] 3. Rolling steps

[0056] Total reduction rate 57.2%: The raw materials are rolled in multiple passes, and the total reduction rate is controlled at 57.2%.

[0057] F1 stand 20% reduction: During the first rolling pass, the material thickness is reduced by 20%.

[0058] F2 stand presses down 20.3%: During the second rolling process, the material thickness is reduced by 20.3%.

[0059] F3 stand presses down 20.2%: During the third rolling process, the material thickness is reduced by 20.2%.

[0060] F4 stand presses down 14.7%: During the fourth rolling process, the material thickness is reduced by 14.7%.

[0061] F5 stand 1.5% reduction: During the last rolling pass, the material thickness is reduced by 1.5% to ensure the final thickness and surface flatness.

[0062] 4. Unit tension control

[0063] During the rolling process, the unit tension of each stand is controlled. The specific parameters are as follows:

[0064] F1 frame: 5.1(10N / mm 2 )

[0065] F2 frame: 13(10N / mm 2 )

[0066] F3 frame: 13.5(10N / mm 2 )

[0067] F4 frame: 14.5(10N / mm 2 )

[0068] F5 frame: 15.4 (10N / mm 2 )

[0069] Discharge end: 5.2(10N / mm 2 )

[0070] 5. Working roll bending control

[0071] To ensure flatness during rolling, both the working roll and the bending roll use a bending force of 18-21 (10KN / ch).

[0072] 6. Rolling force control

[0073] On different rolling stands, the rolling force is controlled, and the specific parameters are as follows:

[0074] F1 frame: 1400 tons

[0075] F2 frame: 1450 tons

[0076] F3 frame: 1350 tons

[0077] F4 frame: 1250 tons

[0078] F5 frame: 550 tons.

[0079] Example:

[0080] 1. Raw material processing

[0081] The selected 22MNB5 steel raw materials are pretreated, including surface cleaning, preheating and other steps, to ensure the uniformity and stability of the material during the rolling process.

[0082] 2. Rolling parameter setting

[0083] The above rolling parameters, including reduction, unit tension, bending roll force and rolling force, are set on the rolling equipment to ensure that the equipment is rolled according to the set parameters.

[0084] 3. Rolling process control

[0085] During the rolling process, the thickness, surface quality and mechanical properties of the material are monitored in real time to ensure that the material meets the expected technical requirements after each rolling process.

[0086] 4. Finished product processing

[0087] After rolling, the finished product is subjected to surface treatment and quality inspection to ensure that it meets relevant standards and user requirements.

[0088] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A cold rolling mill 22MNB5 rolling method, characterized in that: The following steps are involved: 1). Raw material preparation Select 22MNB5 steel raw materials that meet the standards; 2.) Determination of rolling process parameters According to the characteristics of raw materials, determine reasonable rolling process parameters to ensure uniform deformation and surface quality of materials during rolling; 3). Rolling steps Total reduction rate 57.2%: The raw materials are rolled in multiple passes, and the total reduction rate is controlled at 57.2%; F1 stand presses down 20%: during the first rolling process, the material thickness is reduced by 20%; F2 stand presses down 20.3%: During the second rolling process, the material thickness is reduced by 20.3%; F3 stand presses down 20.2%: During the third rolling process, the material thickness is reduced by 20.2%; F4 stand presses down 14.7%: During the fourth rolling process, the material thickness is reduced by 14.7%; F5 stand 1.5% reduction: During the last rolling process, the material thickness is reduced by 1.5% to ensure the final thickness and surface flatness; 4).Unit tension control During the rolling process, the unit tension of each stand is controlled. The specific parameters are as follows: F1 frame: 5.1(10N / mm 2 ); F2 frame: 13(10N / mm 2 ); F3 frame: 13.5(10N / mm 2 ); F4 frame: 14.5(10N / mm 2 ); F5 frame: 15.4 (10N / mm 2 ); Discharge end: 5.2(10N / mm 2 ); 5). Working roll bending control To ensure flatness during rolling, the working roll and bending roll use a bending force of 18-21 (10KN / ch); 6). Rolling force control On different rolling stands, the rolling force is controlled, and the specific parameters are as follows: F1 frame: 1400 tons; F2 frame: 1450 tons; F3 frame: 1350 tons; F4 frame: 1250 tons; F5 frame: 550 tons.

2. The cold rolling mill 22MNB5 rolling method according to claim 1, characterized in that: The step 1) further comprises: pre-treating the selected 22MNB5 steel raw material, including surface cleaning, preheating and other steps, to ensure the uniformity and stability of the material during the rolling process.

3. The cold rolling mill 22MNB5 rolling method according to claim 1, characterized in that: During the rolling process, the thickness, surface quality and mechanical properties of the material are monitored in real time to ensure that the material meets the expected technical requirements after each rolling process.

4. The cold rolling mill 22MNB5 rolling method according to claim 1, characterized in that: After rolling, the finished product is subjected to surface treatment and quality inspection to ensure that it meets relevant standards and user requirements.

5. The cold rolling mill 22MNB5 rolling method according to claim 1, characterized in that: The rolling method simplifies the process flow, improves production efficiency and reduces production costs.

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