CN105170855A - Method for avoiding ring cracks generated by upsetting and then drawing-out of pouring end of large Cr4 steel ingot - Google Patents
Method for avoiding ring cracks generated by upsetting and then drawing-out of pouring end of large Cr4 steel ingot Download PDFInfo
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- CN105170855A CN105170855A CN201510410563.2A CN201510410563A CN105170855A CN 105170855 A CN105170855 A CN 105170855A CN 201510410563 A CN201510410563 A CN 201510410563A CN 105170855 A CN105170855 A CN 105170855A
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- steel ingot
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- bottom seat
- upsetting
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Abstract
The invention discloses a method for avoiding ring cracks generated by upsetting and then drawing-out of a pouring end of a large Cr4 steel ingot. The method includes the following technology steps that firstly, handle pressing and cutting are conducted on a base of the pouring end; and secondly, a concave base plate is used for upsetting one end of the cut base of the pouring end. According to the method, handle pressing and cutting are conducted on the base of the pouring end before upsetting so that ring-shaped indentations formed by pressing the base of the pouring end into the steel ingot can be avoided during upsetting; during upsetting, the concave base plate is adopted so that compression deformation consistency of an end face can be good, and ring-shaped indentations can be further avoided; and meanwhile, due to the fact that smoothness finishing is conducted on the end face of the cut base of the pouring end, ring cracks and other cracks can be avoided in the upsetting process of the end face, the production heating number is reduced, and the production efficiency is improved.
Description
Technical field
The invention belongs to forging field, be specifically related to a kind ofly solve large-scale Cr4 steel ingot and water end jumping-up and pull out the method for ring crack again.
Background technology
When producing large-scale forged steel backup roll, usually select the Cr4 material VC ingot of more than 70 tons to produce, what generally adopt at present is traditional free forging process, in order to improve the internal soundness of steel ingot, usually adopts jumping-up operation to ensure the forging ratio requirement of product.But because the tail end of the VC steel ingot of casting production is with cast base, when adopting plane backing plate jumping-up, certain difference in height is there is because steel ingot waters end cast base, the inside of bottom seat press-in steel ingot is watered during jumping-up, end end face can be watered at steel ingot and leave annular indentation, when pulling out along with watering end end face heart portion outwards movement, the metal flow of surface of steel ingot, simultaneously because the effect of tension can occur ring crack at the former end cast base position that waters, affect product surface quality, increase and produce fire, reduce production efficiency.
Summary of the invention
The technical issues that need to address of the present invention are to provide one and enhance productivity, and reduce and produce fire, avoid because steel ingot structure produces the solution that jumping-up pulls out tail end ring crack again.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
Solve large-scale Cr4 steel ingot and water the method that end jumping-up pulls out ring crack again, the method comprises following processing step:
1) bottom seat excision is watered
First carrying out pressure handle to watering bottom seat, then excising;
2) spill backing plate jumping-up
Steel ingot after watering bottom seat to excision carries out jumping-up, and during jumping-up, steel ingot is vertically placed on spill backing plate, and one end of steel ingot and spill pad contact is excise the one end of watering bottom seat; Described spill backing plate is backing plate working face being arranged circular groove.
Further, the radius of curvature of described circular groove is 2350mm.
Further, after watering bottom seat pressure handle excision in described step 1), the end face after watering bottom seat to excision is repaired, and makes end face smooth.
Owing to have employed technique scheme, the technological progress that the present invention obtains is:
The present invention is before jumping-up, pressure handle excision is carried out to watering bottom seat, would not be inner because of watering bottom seat press-in steel ingot during jumping-up, form annular indentation, during jumping-up, adopt spill backing plate, end face compression uniformity is good, further avoid the generation forming annular indentation, carry out smoothness finishing to excising the end face watering bottom seat simultaneously, make end face in upsetting process, there will not be ring crack and other crackle, and then reduce production fire, improve production efficiency.
Accompanying drawing explanation
Fig. 1 is spill backing plate schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further details:
The present invention a kind ofly solves large-scale Cr4 steel ingot and waters end jumping-up and pull out the method for ring crack again, for the forging of large-scale forged steel backup roll.The method, based on traditional free forging process, on traditional Forging Technology basis, increases and waters bottom seat pressure handle excision technique, and when jumping-up operation, adopts spill backing plate, solves the end capacity check in blank production process, enhances productivity, reduce and produce fire.
The inventive method comprises following processing step:
1) bottom seat excision is watered
First carrying out pressure handle to watering bottom seat, then excising;
2) spill backing plate jumping-up
Steel ingot after watering bottom seat to excision carries out jumping-up, and during jumping-up, steel ingot is vertically placed on spill backing plate, and one end of steel ingot and spill pad contact is excise the one end of watering bottom seat; Described spill backing plate 1 is backing plate working face being arranged circular groove 2, and spill backing plate as shown in Figure 1.
During in order to ensure jumping-up, the compress variation of blank end face is relatively more reasonable, and there will not be forging defect, and when ensureing that postorder pulls out, end face there will not be large bulge, the radius of curvature of described circular groove 2 is set as 2350mm.
Meanwhile, in order to ensure that end face can not water bottom seat because of excision, and occur other irregular splitting, in described step 1) after watering bottom seat pressure handle excision, the end face after watering bottom seat to excision is repaired, and makes end face smooth.
Concrete production technology based on the inventive method is as follows:
1) steel ingot is come out of the stove after meeting heating process, first carries out pressure handle to the rising head of steel ingot, carries out pressure handle to tail end cast base, chamfered edge carries out to surface of steel ingot round as a ball, then to watering bottom seat pressure handle excision, the end face after excision being repaired, makes end face smooth;
2) spill upset block is utilized to carry out jumping-up to steel ingot tail end (one end of bottom seat is watered in excision);
3) after jumping-up, entirety pulling is carried out to steel ingot;
4) finished product is trimmed to.
Claims (3)
1. solve large-scale Cr4 steel ingot and water the method that end jumping-up pulls out ring crack again, it is characterized in that: the method comprises following processing step:
1) bottom seat excision is watered
First carrying out pressure handle to watering bottom seat, then excising;
2) spill backing plate jumping-up
Steel ingot after watering bottom seat to excision carries out jumping-up, and during jumping-up, steel ingot is vertically placed on spill backing plate (1), and one end that steel ingot contacts with spill backing plate (1) is excise the one end of watering bottom seat; Described spill backing plate (1) is backing plate working face being arranged circular groove (2).
2. the large-scale Cr4 steel ingot of solution according to claim 1 waters the method that end jumping-up pulls out ring crack again, it is characterized in that the radius of curvature of described circular groove (2) is 2350mm.
3. the large-scale Cr4 steel ingot of solution according to claim 1 waters the method that end jumping-up pulls out ring crack again, and after it is characterized in that watering bottom seat pressure handle excision in described step 1), the end face after watering bottom seat to excision is repaired, and makes end face smooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410563.2A CN105170855B (en) | 2015-07-14 | 2015-07-14 | A kind of large-scale Cr4 steel ingots of solution pour the method that end jumping-up pulls out ring crack again |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510410563.2A CN105170855B (en) | 2015-07-14 | 2015-07-14 | A kind of large-scale Cr4 steel ingots of solution pour the method that end jumping-up pulls out ring crack again |
Publications (2)
| Publication Number | Publication Date |
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| CN105170855A true CN105170855A (en) | 2015-12-23 |
| CN105170855B CN105170855B (en) | 2017-09-29 |
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| CN201510410563.2A Active CN105170855B (en) | 2015-07-14 | 2015-07-14 | A kind of large-scale Cr4 steel ingots of solution pour the method that end jumping-up pulls out ring crack again |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262647A (en) * | 2017-07-27 | 2017-10-20 | 吴浩 | A kind of method for upsetting of large-scale round steel bar |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002282994A (en) * | 2001-03-22 | 2002-10-02 | Omron Corp | Caulking method for contact |
| CN101491822A (en) * | 2009-03-12 | 2009-07-29 | 西南铝业（集团）有限责任公司 | Free-forging shortening method and anvil at ultralimit aspect ratio |
| CN201791886U (en) * | 2010-09-20 | 2011-04-13 | 中冶陕压重工设备有限公司 | Double-purpose supporting ring device used on large-sized forging hydraulic machine |
| CN102397967A (en) * | 2011-11-15 | 2012-04-04 | 中冶陕压重工设备有限公司 | Forging preparation method for a sector plate |
| CN102500733A (en) * | 2011-09-22 | 2012-06-20 | 中国科学院金属研究所 | Forging method for efficiently healing internal hole-type defects of steel ingot |
| CN103567341A (en) * | 2012-08-07 | 2014-02-12 | 上海重型机器厂有限公司 | Forging method for CAP1400 nuclear power pressure vessel pipe connecting section |
-
2015
- 2015-07-14 CN CN201510410563.2A patent/CN105170855B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002282994A (en) * | 2001-03-22 | 2002-10-02 | Omron Corp | Caulking method for contact |
| CN101491822A (en) * | 2009-03-12 | 2009-07-29 | 西南铝业（集团）有限责任公司 | Free-forging shortening method and anvil at ultralimit aspect ratio |
| CN201791886U (en) * | 2010-09-20 | 2011-04-13 | 中冶陕压重工设备有限公司 | Double-purpose supporting ring device used on large-sized forging hydraulic machine |
| CN102500733A (en) * | 2011-09-22 | 2012-06-20 | 中国科学院金属研究所 | Forging method for efficiently healing internal hole-type defects of steel ingot |
| CN102397967A (en) * | 2011-11-15 | 2012-04-04 | 中冶陕压重工设备有限公司 | Forging preparation method for a sector plate |
| CN103567341A (en) * | 2012-08-07 | 2014-02-12 | 上海重型机器厂有限公司 | Forging method for CAP1400 nuclear power pressure vessel pipe connecting section |
Non-Patent Citations (1)
| Title |
|---|
| 李集仁: "《锻工简明实用手册》", 30 November 2009, 江苏科学技术出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107262647A (en) * | 2017-07-27 | 2017-10-20 | 吴浩 | A kind of method for upsetting of large-scale round steel bar |
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| CN105170855B (en) | 2017-09-29 |
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