A method for forming forgings based on a precision forging machine

Abstract

This invention discloses a high-quality forging method based on a precision forging machine, belonging to the field of steel forging technology. To improve the processing efficiency and quality of steel forging, this invention selects continuously cast billets. The selected billets are heated and then forged on a precision forging machine using a five-pass forging process: the first pass uses a reduction of 50mm at a forging frequency of 180 times / min; the second pass uses a reduction of 100mm at a forging frequency of 60 times / min; the third pass uses a reduction of 80mm at a forging frequency of 90 times / min; the fourth pass uses a reduction of 45mm at a forging frequency of 180 times / min; and the fifth pass uses a reduction of 5-20mm at a forging frequency of 240 times / min. After forging, the residual heat is used instead of normalizing the billet. The forging is air-cooled to a certain temperature and then slowly cooled in a slow cooling pit. After surface finishing, a high-quality forging product is obtained.

Description

Technical Field

[0001] This invention belongs to the field of steel forging technology, specifically relating to a forging method based on a precision forging machine. Background Technology

[0002] To improve yield and shorten delivery time, an increasing number of national standard alloy structural steel forgings are being produced using the direct drawing method with cast billets. However, because this direct drawing without upsetting results in insufficient internal deformation of the cast billet, leading to shrinkage cavities and poor welding, the final product often fails to meet quality standards during flaw detection. Existing methods rely on the original... The upsetting process of continuously cast billets increases the forging ratio to >3. By combining upsetting and drawing, the internal quality of the steel is improved. However, the production efficiency is low, and the forging temperature will drop, which is not conducive to the subsequent deformation of the steel and increases equipment wear. Summary of the Invention

[0003] The problem to be solved by this invention is to improve the processing efficiency of steel forging and improve the quality of forgings, and to propose a forging forming method based on a precision forging machine.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for forming forged materials based on a precision forging machine includes the following steps:

[0006] S1. Select continuously cast billets;

[0007] S2. Heating the continuous casting billet selected in step S1;

[0008] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0009] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0010] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0011] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0012] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0013] The fifth pass uses a forging reduction of 5-20mm and a forging frequency of 240 times / min;

[0014] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After finishing the surface, a high-quality forging finished product is obtained.

[0015] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is one of carbon structural steel, CrMo series structural steel, or CrNiMo series structural steel.

[0016] Furthermore, the material of the continuously cast billet in step S1 is 42CrMoA structural steel.

[0017] Furthermore, in step S2, the continuously cast billet is loaded into a gas-fired heating furnace and heated to a temperature of 1190℃~1210℃ for 6 to 8 hours. After being taken out of the furnace, the continuously cast billet is air-cooled. The next step is carried out when the surface temperature of the continuously cast billet is controlled at 1000℃~1050℃.

[0018] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0019] The first pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min. The second pass uses rotary feeding for both car A and car B, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min. The third pass uses rotary feeding for both car A and car B, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min. The fourth pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min. The fifth pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min. The empty run speed of car A and car B is 15 m / min.

[0020] Furthermore, in step S3, the final forging temperature is controlled between 850℃ and 900℃.

[0021] Furthermore, in step S4, the forging is air-cooled to 500℃~600℃, and then slowly cooled in a slow cooling pit. After surface finishing, a high-quality forging finished product is obtained.

[0022] The beneficial effects of this invention are:

[0023] The forging method based on a precision forging machine described in this invention does not require an upsetting process or an additional forging pass, resulting in higher production efficiency.

[0024] The present invention discloses a forging method based on a precision forging machine, which stabilizes the physical quality of products with a direct production limit of Φ450mm / Φ370mm from a precision forging machine for Φ650mm continuous casting round billets, thereby reducing rework and defective products.

[0025] The present invention discloses a forging method based on a precision forging machine, which improves the internal quality of Φ650mm continuously cast round billets. By reducing the number of forgings per minute, it enables greater reduction under limited force. At the same time, by increasing the contact time with the material, it transforms the impact force into static pressure, welds the internal porosity, and makes the structure of the forged steel dense. The macroscopic flaw detection quality meets customer requirements.

[0026] This invention discloses a forging forming method based on a precision forging machine, particularly improving the direct production of Φ650mm continuous casting round billets from the precision forging machine: For the ultimate specification Φ450mm forgings, the flaw detection level achieves: the equivalent flat-bottom hole diameter for elongated or densely packed discontinuous dots ≤ 5mm; for the ultimate specification Φ370mm forgings, the equivalent flat-bottom hole diameter for elongated or densely packed discontinuous dots ≤ 3mm. This achieves optimal and stable quality improvement without reducing production efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the forging process to be carried out on the A-car of the precision forging machine according to the present invention;

[0028] Figure 2 This is a schematic diagram of the forging process of the B-car chuck of the precision forging machine described in this invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention; that is, the described specific embodiments are merely a part of the embodiments of the invention, and not all of them. The components of the specific embodiments of the invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations, and the invention may also have other embodiments.

[0030] Therefore, the following detailed description of specific embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected specific embodiments of the invention. All other specific embodiments obtained by those skilled in the art based on these specific embodiments without inventive effort are within the scope of protection of this invention.

[0031] To further understand the invention's content, features, and effects, the following specific embodiments are provided, along with accompanying drawings. Figure 1 and attached Figure 2 Detailed explanation is as follows: Specific implementation method one:

[0033] A method for forming forged materials based on a precision forging machine includes the following steps:

[0034] S1. Select continuously cast billets;

[0035] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is 35CrMoA;

[0036] S2. Heating the continuous casting billet selected in step S1;

[0037] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1210°C for 6 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1050°C.

[0038] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0039] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0040] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0041] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0042] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0043] The fifth pass uses a forging reduction of 10mm and a forging frequency of 240 times / min;

[0044] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0045] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0046] Furthermore, in step S3, the final forging temperature is controlled at 900℃;

[0047] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0048] Furthermore, in step S4, the forging is air-cooled to 600℃, and then subjected to slow cooling and heat treatment (heat treatment regime 880℃ oil 550℃ oil) in a slow cooling pit. After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 1.

[0049] Table 1 Properties of the forgings prepared in this embodiment

[0050] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 940 1045 49 13 / 13 Specific Implementation Method Two:

[0052] A method for forming forged materials based on a precision forging machine includes the following steps:

[0053] S1. Select continuously cast billets;

[0054] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is 40Cr;

[0055] S2. Heating the continuous casting billet selected in step S1;

[0056] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1190°C for 8 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1000°C.

[0057] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0058] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0059] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0060] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0061] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0062] The fifth pass uses a reduction of 5mm forging and a forging frequency of 240 times / min;

[0063] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0064] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0065] Furthermore, in step S3, the final forging temperature is controlled at 850℃;

[0066] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0067] Furthermore, in step S4, the forging is air-cooled to 550°C, and then subjected to slow cooling and heat treatment in a slow cooling pit (heat treatment regime 880°C oil 520°C oil). After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 2.

[0068] Table 2 Properties of the forgings prepared in this embodiment

[0069] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 985 1105 58 14.0 Specific implementation method three:

[0071] A method for forming forged materials based on a precision forging machine includes the following steps:

[0072] S1. Select continuously cast billets;

[0073] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is No. 45 structural steel;

[0074] S2. Heating the continuous casting billet selected in step S1;

[0075] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1200℃ for 6 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1000℃.

[0076] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0077] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0078] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0079] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0080] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0081] The fifth pass uses a reduction of 20mm forging and a forging frequency of 240 times / min;

[0082] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0083] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0084] Furthermore, in step S3, the final forging temperature is controlled at 900℃;

[0085] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0086] Furthermore, in step S4, the forging is air-cooled to 500℃, and then subjected to slow cooling and heat treatment in a slow cooling pit (heat treatment regime 840℃ water 600 ml water). After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 3.

[0087] Table 3 Properties of the forgings prepared in this embodiment

[0088] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 415 709 55 25 Specific implementation method four:

[0090] A method for forming forged materials based on a precision forging machine includes the following steps:

[0091] S1. Select continuously cast billets;

[0092] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is Q345D structural steel;

[0093] S2. Heating the continuous casting billet selected in step S1;

[0094] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1210°C for 6 to 8 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1050°C.

[0095] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0096] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0097] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0098] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0099] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0100] The fifth pass uses a forging reduction of 10mm and a forging frequency of 240 times / min;

[0101] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0102] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0103] Furthermore, in step S3, the final forging temperature is controlled at 900℃;

[0104] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0105] Furthermore, in step S4, the forging is air-cooled to 600℃, and then subjected to slow cooling and heat treatment in a slow cooling pit (heat treatment regime 910℃ air cooling). After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 4.

[0106] Table 4 Properties of the forgings prepared in this embodiment

[0107] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 284 466 75 35.5 Specific implementation method five:

[0109] A method for forming forged materials based on a precision forging machine includes the following steps:

[0110] S1. Select continuously cast billets;

[0111] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is 40Cr structural steel;

[0112] S2. Heating the continuous casting billet selected in step S1;

[0113] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1190°C for 8 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1000°C.

[0114] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0115] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0116] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0117] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0118] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0119] The fifth pass uses a reduction of 5mm forging and a forging frequency of 240 times / min;

[0120] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0121] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0122] Furthermore, in step S3, the final forging temperature is controlled at 850℃;

[0123] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0124] Furthermore, in step S4, the forging is air-cooled to 500℃, and then subjected to slow cooling and heat treatment in a slow cooling pit (heat treatment regime 880℃ oil 520℃ oil). After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 5.

[0125] Table 5 Properties of the forgings prepared in this embodiment

[0126] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 1103 1179 51 12 Specific implementation method six:

[0128] A method for forming forged materials based on a precision forging machine includes the following steps:

[0129] S1. Select continuously cast billets;

[0130] Furthermore, in step S1, the weight of the continuously cast billet selected is 6.6 tons, and the specifications are as follows: The material of the continuously cast billet is No. 35 structural steel;

[0131] S2. Heating the continuous casting billet selected in step S1;

[0132] Furthermore, in step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1195°C for 7 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1050°C.

[0133] S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes:

[0134] The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min;

[0135] The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min;

[0136] The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min;

[0137] The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min;

[0138] The fifth pass uses a reduction of 20mm forging and a forging frequency of 240 times / min;

[0139] Furthermore, the feeding speed settings for the A-car chuck and B-car chuck in step S3 are as follows:

[0140] The first pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min; the second pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the third pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min; the fourth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min; the fifth pass uses rotary feeding for both car A and car B chucks, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min; the empty run speed of car A and car B chucks is 15 m / min.

[0141] Furthermore, in step S3, the final forging temperature is controlled at 850℃;

[0142] S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After surface finishing, a high-quality finished forging is obtained.

[0143] Furthermore, in step S4, the forging is air-cooled to 550°C, and then subjected to slow cooling and heat treatment in a slow cooling pit (heat treatment regime: 850°C water 600°C water). After surface finishing, a high-quality forging finished product is obtained. The properties of the obtained finished product are shown in Table 6.

[0144] Table 6 Properties of the forgings prepared in this embodiment

[0145] <![CDATA[Yield strength N / mm 2 > <![CDATA[Tensile strength N / mm 2 > Shrinkage % Elongation % 360 618 57 25

[0146] It should be noted that relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0147] Although this application has been described above with reference to specific embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of this application. In particular, as long as there is no structural conflict, the features in the specific embodiments disclosed in this application can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, this application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A method for forming forged materials based on a precision forging machine, characterized in that, Includes the following steps: S1. Select continuously cast billets; The selected continuous casting billet has a billet size of φ650×2500mm; S2. Heating the continuous casting billet selected in step S1; In step S2, the continuous casting billet is loaded into a gas-fired heating furnace and heated to a temperature of 1190℃~1210℃ for 6 to 8 hours. After being taken out of the furnace, the continuous casting billet is air-cooled. The next step is carried out when the surface temperature of the continuous casting billet is controlled at 1000℃~1050℃. S3. The heated continuously cast billet is forged on a precision forging machine in 5 passes: The first pass uses a forging reduction of 50mm and a forging frequency of 180 times / min; The second pass uses a reduction of 100mm forging and a forging frequency of 60 times / min; The third pass uses a reduction of 80mm forging and a forging frequency of 90 times / min; The fourth pass uses a reduction of 45mm forging and a forging frequency of 180 times / min; The fifth pass uses a forging reduction of 5-20mm and a forging frequency of 240 times / min; In step S3, the final forging temperature is controlled at 850℃~900℃; S4. For the continuously cast billet after forging in step S3, the residual heat after forging is used instead of normalizing. After the forging is air-cooled to a certain temperature, it is then slowly cooled in a slow cooling pit. After finishing the surface, a high-quality forging finished product is obtained. In step S4, the forging is air-cooled to 500℃~600℃, and then slowly cooled in a slow cooling pit. After surface finishing, a high-quality forging finished product is obtained.

2. The forging method based on a precision forging machine according to claim 1, characterized in that: The weight of the continuously cast billet selected in step S1 is 6.6 tons, and the material of the continuously cast billet is one of carbon structural steel, CrMo series structural steel, or CrNiMo series structural steel.

3. The forging method based on a precision forging machine according to claim 2, characterized in that: The material of the continuously cast billet in step S1 is 42CrMoA structural steel.

4. The forging method based on a precision forging machine according to claim 3, characterized in that: The feeding speed settings for the A-car chuck and B-car chuck of the precision forging machine in step S3 are as follows: The first pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.4 m / min and an output speed of 4 m / min. The second pass uses rotary feeding for both car A and car B, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min. The third pass uses rotary feeding for both car A and car B, with a feeding speed of ≤2.8 m / min and an output speed of 4 m / min. The fourth pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.2 m / min and an output speed of 4 m / min. The fifth pass uses rotary feeding for both car A and car B, with a feeding speed of ≤3.4 m / min and an output speed of 3.5 m / min. The empty run speed of car A and car B is 15 m / min.

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