CN110756709A - Forging method of forging material with diameter of 350-400mm - Google Patents
Forging method of forging material with diameter of 350-400mm Download PDFInfo
- Publication number
- CN110756709A CN110756709A CN201910790025.9A CN201910790025A CN110756709A CN 110756709 A CN110756709 A CN 110756709A CN 201910790025 A CN201910790025 A CN 201910790025A CN 110756709 A CN110756709 A CN 110756709A
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- China
- Prior art keywords
- forging
- diameter
- continuous casting
- flat anvil
- casting blank
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
Abstract
The invention relates to a forging method of a forging material with the diameter of 350-400mm, which belongs to the technical field of forging production processes in the metallurgical industry, and adopts the technical scheme that ① raw materials adopt a continuous casting blank, the hot delivery temperature of the continuous casting blank is 550-600 ℃, the heating temperature is 1220-1240 ℃, the heat preservation time is 4-6 hours, ② drawing is carried out on the continuous casting blank by using a flat anvil for 4-6 times, the drawing ratio is 2.25-2.94, the single reduction is 0.2-0.22 times of the original section height, and the turning is 90 degrees between drawing operations.
Description
Technical Field
The invention relates to a forging method for a forging material with the diameter of 350-.
Background
The forging is to utilize the plasticity of the material to generate plastic deformation under the action of external force so as to obtain the forging with required shape, size and certain tissue performance.
At present, forging materials with the diameter of 350-400mm are produced by steel ingots, and the yield is generally about 80%; because the steel ingot is provided with a riser, the quality is poor, the finished product needs to be cut off, the usable part is reduced, and the yield is low.
The forging material with the diameter of 350-: when forging with a steel ingot, the forging ratio is generally not less than 3 without upsetting. The forging ratio of a general forged product in the forging industry is more than 3, and the flaw detection level of the product can be ensured to meet the use requirement.
The method adopts a steel ingot to produce the forging material with the diameter of 350-400mm, and the forging number of fire is generally 2-3, so that the method not only increases the production cost and influences the production efficiency of the product, but also wastes raw materials.
Disclosure of Invention
The invention aims to provide a forging method of a forging material with the diameter of 350-400mm, which can reduce the production cost, improve the yield and the production efficiency and solve the problems in the background technology.
The technical scheme of the invention is as follows:
a forging method of a forging material with the diameter of 350-400mm comprises the following steps:
①, adopting a continuous casting billet, wherein the hot delivery temperature of the continuous casting billet is 550-600 ℃, the heating temperature is 1220-1240 ℃, and the heat preservation time is 4-6 hours;
② drawing the continuous casting blank by using a flat anvil for 4-6 times, forging ratio of 2.25-2.94, single rolling reduction of 0.2-0.22 times of original section height, and turning 90 degrees between each drawing.
The flat anvil in the step is a 350mm wide flat anvil, the fillet radius of the flat anvil is 35mm, and the length of the flat anvil is 1300 mm.
The continuous casting billet is a round billet with the diameter of 600 mm.
The invention has the beneficial effects that:
(1) the invention can produce products by heating once, compared with the prior art, the invention can reduce heating for 1-2 times, and the cost is expected to be saved by about 50%;
(2) the invention can produce products by one-time heating, greatly improves the production efficiency compared with the prior art, and is expected to shorten the operation time of the press by about 50 percent, thereby greatly saving resources;
(3) the forging ratio of the invention is only 2.2-2.94, the production of upsetting process is not carried out, the upsetting time can be saved, the production cost can be reduced, and the production efficiency can be improved.
Detailed Description
This patent is further illustrated by the following examples.
A forging method of a forging material with the diameter of 350-400mm comprises the following steps:
①, adopting a continuous casting billet, wherein the hot delivery temperature of the continuous casting billet is 550-600 ℃, the heating temperature is 1220-1240 ℃, and the heat preservation time is 4-6 hours;
② drawing the continuous casting blank by using a flat anvil for 4-6 times, forging ratio of 2.25-2.94, single rolling reduction of 0.2-0.22 times of original section height, and turning 90 degrees between each drawing.
Example 1:
(1) the diameter of the continuous casting billet is 600mm, the diameter of the forged material is 400mm, the material is 45# steel, the hot delivery temperature of the continuous casting billet is 550 ℃, the heating temperature is up to 1220 ℃, and the heat preservation is carried out for 4 hours;
(2) the direct drawing forging process with the forging ratio of 2.25 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 1.
Table 1: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing to obtain a forged product with the diameter of 400mm after 4 drawing passes are finished.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Example 2:
(1) the diameter of the continuous casting billet is 600mm, the diameter of the forged material is 370mm, the material is 42CrMo, the hot delivery temperature of the continuous casting billet is 560 ℃, and the heating temperature is 1240 ℃ and the heat preservation is carried out for 5 hours;
(2) the direct drawing forging process with the forging ratio of 2.49 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 2.
Table 2: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing the forging stock product with the diameter of 380mm after the drawing 5 times.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Example 3:
(1) producing a forged material product made of 40Cr, wherein the diameter of a continuous casting billet is 600mm, the diameter of the forged material is 350mm, and the hot delivery temperature of the continuous casting billet is 600 ℃; heating to 1230 ℃, and keeping the temperature for 6 h;
(2) the direct drawing forging process with the forging ratio of 2.25 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 3.
Table 3: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing the forged product with the diameter of 400mm after finishing drawing 6 times.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Example 4:
(1) producing a forged product with the material of 30CrMnSi, wherein the diameter of a continuous casting billet is 600mm, the diameter of the forged product is 360mm, and the hot delivery temperature of the continuous casting billet is 580 ℃; heating to 1225 ℃, and keeping the temperature for 4 hours;
(2) the forging process of direct drawing with the forging ratio of 2.78 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 4.
Table 4: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing to obtain a forging material product with the diameter of 360mm after 4 drawing passes are finished.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Example 5:
(1) producing a forged material product with the material quality of 4130, wherein the diameter of a continuous casting billet is 600mm, the diameter of the forged material is 380mm, and the hot delivery temperature of the continuous casting billet is 590 ℃; heating to 1235 ℃ and preserving the heat for 6 h;
(2) the direct drawing forging process with the forging ratio of 2.94 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 5.
Table 5: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing to obtain a forging material product with the diameter of 350mm after 4 drawing passes are finished.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Example 6:
(1) producing a forged material product with the material of 27SiMn, wherein the diameter of a continuous casting billet is 600mm, the diameter of the forged material is 390mm, and the hot delivery temperature of the continuous casting billet is 560 ℃; heating to 1225 ℃, and keeping the temperature for 5.5 h;
(2) the direct drawing forging process with the forging ratio of 2.37 is adopted, drawing is carried out by a 350mm flat anvil, and the fillet radius of the wide flat anvil is 35mm and the length is 1300 mm. The elongation dimensions of each pass are shown in table 6.
Table 6: elongation size per pass (mm)
Turning over 90 degrees after each pass of pressing is finished, and pressing the next pass again; and directly drawing to obtain a forging material product with the diameter of 390mm after 4 drawing passes are finished.
The forged material obtained in the embodiment meets SEP 1921E/E grade requirements after ultrasonic flaw detection.
Claims (3)
1. A forging method of a forging material with the diameter of 350-400mm is characterized in that: comprises the following steps:
①, adopting a continuous casting blank as a raw material, wherein the hot delivery temperature of the continuous casting blank is 550-600 ℃, the heating temperature is 1220-1240 ℃, and the heat preservation time is 4-6 hours;
② drawing the continuous casting blank by using a flat anvil for 4-6 times, forging ratio of 2.25-2.94, single rolling reduction of 0.2-0.22 times of original section height, and turning 90 degrees between each drawing.
2. The forging method of a forging material with a diameter of 350-400mm as claimed in claim 1, wherein: the flat anvil in the step is a 350mm wide flat anvil, the fillet radius of the flat anvil is 35mm, and the length of the flat anvil is 1300 mm.
3. The forging method of a forging material with a diameter of 350-400mm as claimed in claim 2, wherein: the continuous casting billet is a round billet with the diameter of 600 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790025.9A CN110756709A (en) | 2019-08-26 | 2019-08-26 | Forging method of forging material with diameter of 350-400mm |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910790025.9A CN110756709A (en) | 2019-08-26 | 2019-08-26 | Forging method of forging material with diameter of 350-400mm |
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| CN110756709A true CN110756709A (en) | 2020-02-07 |
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| CN201910790025.9A Pending CN110756709A (en) | 2019-08-26 | 2019-08-26 | Forging method of forging material with diameter of 350-400mm |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376156A (en) * | 2007-08-28 | 2009-03-04 | 上海重型机器厂有限公司 | Method for forging and pressing component reactor core fulcrum table forging in nuclear pile |
| CN103658479A (en) * | 2012-09-12 | 2014-03-26 | 中航卓越锻造（无锡）有限公司 | Technology for forging squeeze roller of cement roller press |
| CN106975719A (en) * | 2017-06-01 | 2017-07-25 | 东南大学 | A kind of forging method of cogging |
| CN108705014A (en) * | 2018-05-08 | 2018-10-26 | 石钢京诚装备技术有限公司 | A kind of die forging method of module forging |
| CN110125314A (en) * | 2019-05-17 | 2019-08-16 | 石钢京诚装备技术有限公司 | A kind of forging method of high-carbon-chromium bearing steel forging stock |
-
2019
- 2019-08-26 CN CN201910790025.9A patent/CN110756709A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101376156A (en) * | 2007-08-28 | 2009-03-04 | 上海重型机器厂有限公司 | Method for forging and pressing component reactor core fulcrum table forging in nuclear pile |
| CN103658479A (en) * | 2012-09-12 | 2014-03-26 | 中航卓越锻造（无锡）有限公司 | Technology for forging squeeze roller of cement roller press |
| CN106975719A (en) * | 2017-06-01 | 2017-07-25 | 东南大学 | A kind of forging method of cogging |
| CN108705014A (en) * | 2018-05-08 | 2018-10-26 | 石钢京诚装备技术有限公司 | A kind of die forging method of module forging |
| CN110125314A (en) * | 2019-05-17 | 2019-08-16 | 石钢京诚装备技术有限公司 | A kind of forging method of high-carbon-chromium bearing steel forging stock |
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Application publication date: 20200207 |