CN105331827A - Method for electroslag remelting blank for large MC5 cold roll blank - Google Patents
Method for electroslag remelting blank for large MC5 cold roll blank Download PDFInfo
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- CN105331827A CN105331827A CN201510760812.0A CN201510760812A CN105331827A CN 105331827 A CN105331827 A CN 105331827A CN 201510760812 A CN201510760812 A CN 201510760812A CN 105331827 A CN105331827 A CN 105331827A
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- electrode
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- electrode blank
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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Abstract
The invention discloses a method for an electroslag remelting blank of a large MC5 cold roll blank. The method includes the steps that firstly, the sizes of cross sections of electrode blanks are determined; secondly, the number of sets of the electrode blanks needed by an electroslag ingot and the net weight of each set of electrode blank are determined according to a set roll blank shape; thirdly, the length of each set of electrode blank is determined according to the weight of each set of electrode blank and the cross sections of the electrode blanks; fourthly, the electrode blanks are manufactured; and fifthly, a three-phase electroslag remelting furnace is started, and the three sets of electrode blanks are sequentially arranged in a crystallizer of the three-phase electroslag remelting furnace, and remelting of the electroslag ingot needed for producing a roll is conducted. According to use conditions and structural characteristics of the cold roll blank, the diameter and the length of the electroslag remelting blank are controlled, electrode exchanging operation is not conducted on the position, equivalent to a roll body, of the electroslag ingot by selecting the electrode blanks with the fixed size, and therefore uniformity of texture of part of the roll body of the roll blank is improved, the segregation phenomenon is relieved, the accident-resisting capability of the roll product is improved, and the service life of the roll product is prolonged.
Description
Technical field
The present invention relates to roll production technical field, particularly the large-scale MC5 of one cold rolling roller stock esr blank technology.
Background technology
MC5 belongs to high alloy tool steel, has good wear resistance and anti-accident ability, is the first-selection of the high-end cold-rolled products roll material of rolling.But the smelting of MC5 steel and forging difficulty comparatively large, easily produce segregation and detection defects, thus cause product rejection, and along with the increase of Roll Blank specification, the manufacture difficulty of product also can increase gradually.The production process of existing Roll Blank is: first in three-phase slag remelting, electrode blank remelting is become ESR ingot, and ESR ingot forms Roll Blank through forging again.And at present, the length of carrying out the multi-group electrode adopted when ESR ingot remelting is produced in three-phase slag remelting furnace is consistent or random, like this, there is electrode and exchange phenomenon in the position being unavoidably equivalent to roller body in ESR ingot, electrode exchanges and causes roller body quality uneven, be easy to produce segregation, and roller body is the crucial bearing position of roll, the anti-accident ability of roll will be reduced like this, thus reduce work-ing life.Therefore, for optimizing the internal organizational structure of roll, improving the work-ing life of roll, needing to control electroslag remelting process, improve the segregation situation of ESR ingot, improve the homogeneity of roller body position quality.
Summary of the invention
The present invention provides a kind of electrode blank specification making often kind of specification ESR ingot corresponding to fix for solving in known technology the technical problem that exists, thus improve the homogeneity of roller stock body of roll position quality and alleviate segregation situation, and then improve the large-scale MC5 cold rolling roller stock esr blank technology in roll product work-ing life.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
A kind of large-scale MC5 cold rolling roller stock esr blank technology, is made up of following steps:
S1: the cross-sectional dimension determining electrode blank
Figure is controlled for foundation with three-phase slag remelting furnace electrode, composite type one and formula two determine the cross-sectional dimension of electrode blank, its Chinese style one is: φ d=2 (φ D-φ x-δ), φ d is electrode blank cross-sectional diameter, φ D is three-phase slag remelting furnace crystallizer cross-sectional dimension, this size is determined according to the sketch of final roll, φ x is the circular diameter value of three-phase slag remelting furnace by three electrode center, δ is safety clearance, it is the distance between the periphery of electrode blank and the inner headed face of three-phase slag remelting furnace crystallizer, its empirical value>=100, shown that by formula one scope of the value of φ d is X ~ Y, formula two is: (φ d/ φ D)
2=n, n are experience factor, are definite value, comprehensive above-mentioned formula one and formula two, draw φ d=Z, and Z is a determined value between X and Y,
S2: needed for the roller stock shape determination ESR ingot of setting electrode blank group number and often organize the net weight of electrode blank: the electrode blank needed for ESR ingot is divided into three groups by principle of this step, the corresponding first group of electrode blank of left side two portions of the middle part body of roll of roll; The corresponding second group of electrode blank of middle part body of roll part of roll, the corresponding 3rd group of electrode blank of right side two portions of the middle part body of roll part of roll, then the net weight respectively organizing electrode blank is:
The net weight of first group of electrode blank is: I+II (t), the weight of I expression roll left end first part, the weight of II expression roll left end second section;
The net weight of second group of electrode blank is: III (t), the weight of the body of roll in the middle part of III expression roll;
The net weight of the 3rd group of electrode blank is: IV+V (t), the weight of IV expression roll right-hand member second section, the weight of V expression roll right-hand member first part;
S3: the cross-sectional area according to the above-mentioned weight and electrode blank of often organizing electrode blank determines the length often organizing electrode blank, and the length wherein often organizing electrode blank comprises free length L
onlywith remainder length L
more than, concrete:
The length of first group of electrode blank:
L1=L1
only+ L1
head
L1
only=(I+II)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L1
headbe 50 ~ 100mm;
L2=L2
only+ L2
head
L2
only=III/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L2
head50 ~ 100mm;
L3=L3
only+ L3
head
L3
only=(IV+V)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L3
headfor 50-100mm;
S4: after the sectional dimension of above-mentioned electrode blank and the length of often organizing electrode blank are determined, carry out the preparation of electrode blank;
S5: after prepared by electrode blank, starts three-phase slag remelting furnace, is placed in successively in three-phase slag remelting furnace crystallizer by three groups of electrode blanks, carries out the remelting of producing ESR ingot needed for roll.
The advantage that the present invention has and positively effect are:
The present invention is according to the working conditions of cold rolling roller stock and constructional feature, the diameter of esr base and length are controlled, like this by selecting the electrode blank of fixed measure, exchange Electrode Operation is not carried out in the position making ESR ingot be equivalent to roller body, thus improve the homogeneity of roller stock body of roll position quality, and alleviate segregation situation, and then improve anti-accident ability and the work-ing life of roll product.
Accompanying drawing explanation
Fig. 1 is that three-phase slag remelting furnace electrode controls figure;
Fig. 2 is the structural representation of cold rolling roller stock.
Embodiment
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Refer to Fig. 1-2, a kind of large-scale MC5 cold rolling roller stock esr blank technology, is made up of following five steps:
S1: the cross-sectional dimension determining electrode blank
Figure is controlled for foundation with three-phase slag remelting furnace electrode, composite type one and formula two determine the cross-sectional dimension of electrode blank, its Chinese style one is: φ d=2 (φ D-φ x-δ), φ d is electrode blank cross-sectional diameter, φ D is three-phase slag remelting furnace crystallizer cross-sectional dimension, this size is determined according to the sketch of final roll, φ x is the circular diameter value of three-phase slag remelting furnace by three electrode center, δ is safety clearance, it is the distance between the periphery of electrode blank and the inner headed face of three-phase slag remelting furnace crystallizer, its empirical value>=100, shown that by formula one scope of the value of φ d is X ~ Y, formula two is: (φ d/ φ D)
2=n, n are experience factor, are definite value, comprehensive above-mentioned formula one and formula two, draw φ d=Z, and Z is a determined value between X and Y,
S2: needed for the roller stock shape determination ESR ingot of setting electrode blank group number and often organize the net weight of electrode blank: the electrode blank needed for ESR ingot is divided into three groups by principle of this step, the corresponding first group of electrode blank of left side two portions of the middle part body of roll of roll; The corresponding second group of electrode blank of middle part body of roll part of roll, the corresponding 3rd group of electrode blank of right side two portions of the middle part body of roll part of roll, then the net weight respectively organizing electrode blank is:
The net weight of first group of electrode blank is: I+II (t), the weight of I expression roll left end first part, the weight of II expression roll left end second section;
The net weight of second group of electrode blank is: III (t), the weight of the body of roll in the middle part of III expression roll;
The net weight of the 3rd group of electrode blank is: IV+V (t), the weight of IV expression roll right-hand member second section, the weight of V expression roll right-hand member first part;
S3: the cross-sectional area according to the above-mentioned weight and electrode blank of often organizing electrode blank determines the length often organizing electrode blank, and the length wherein often organizing electrode blank comprises free length L
onlywith remainder length L
more than, concrete:
The length of first group of electrode blank:
L1=L1
only+ L1
head
L1
only=(I+II)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L1
headfor 50-100mm, during as being necessary for definite value, desirable 70mm.
L2=L2
only+ L2
head
L2
only=III/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L2
headfor 50-100mm, during as being necessary for definite value, desirable 70mm.
L3=L3
only+ L3
head
L3
only=(IV+V)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting device, often organize electrode blank is made up of 3 electrode blanks; L3
headfor 50-100mm, during as being necessary for definite value, desirable 70mm.
S4: after the sectional dimension of electrode blank and the length of often organizing electrode blank are determined, carry out the preparation of electrode billet.
S5: start three-phase electric slag furnace, be placed in successively in three-phase slag remelting furnace crystallizer by three groups of electrode blanks, carries out the remelting of producing ESR ingot needed for roll.
Claims (1)
1. a large-scale MC5 cold rolling roller stock esr blank technology, is made up of following steps:
S1: the cross-sectional dimension determining electrode blank
Figure is controlled for foundation with three-phase slag remelting furnace electrode, composite type one and formula two determine the cross-sectional dimension of electrode blank, its Chinese style one is: φ d=2 (φ D-φ x-δ), φ d is electrode blank cross-sectional diameter, φ D is three-phase slag remelting furnace crystallizer cross-sectional dimension, this size is determined according to the sketch of final roll, φ x is the circular diameter value of three-phase slag remelting furnace by three electrode center, δ is safety clearance, it is the distance between the periphery of electrode blank and the inner headed face of three-phase slag remelting furnace crystallizer, its empirical value>=100, shown that by formula one scope of the value of φ d is X ~ Y, formula two is: (φ d/ φ D)
2=n, n are experience factor, are definite value, comprehensive above-mentioned formula one and formula two, draw φ d=Z, and Z is a determined value between X and Y,
S2: needed for the roller stock shape determination ESR ingot of setting electrode blank group number and often organize the net weight of electrode blank: the electrode blank needed for ESR ingot is divided into three groups by principle of this step, the corresponding first group of electrode blank of left side two portions of the middle part body of roll of roll; The corresponding second group of electrode blank of middle part body of roll part of roll, the corresponding 3rd group of electrode blank of right side two portions of the middle part body of roll part of roll, then the net weight respectively organizing electrode blank is:
The net weight of first group of electrode blank is: I+II (t), the weight of I expression roll left end first part, the weight of II expression roll left end second section;
The net weight of second group of electrode blank is: III (t), the weight of the body of roll in the middle part of III expression roll;
The net weight of the 3rd group of electrode blank is: IV+V (t), the weight of IV expression roll right-hand member second section, the weight of V expression roll right-hand member first part;
S3: the cross-sectional area according to the above-mentioned weight and electrode blank of often organizing electrode blank determines the length often organizing electrode blank, and the length wherein often organizing electrode blank comprises free length L
onlywith remainder length L
more than, concrete:
The length of first group of electrode blank:
L1=L1
only+ L1
head
L1
only=(I+II)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L1
headbe 50 ~ 100mm;
L2=L2
only+ L2
head
L2
only=III/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L2
head50 ~ 100mm;
L3=L3
only+ L3
head
L3
only=(IV+V)/{ [(z
2/ 4) × π × 7.85] × 3}, wherein, z is above-mentioned electrode blank cross diameter, and 7.85 is the density of steel, and 3 represent that in three-phase slag remelting furnace, often organize electrode blank is made up of 3 electrode blanks; L3
headfor 50-100mm;
S4: after the sectional dimension of above-mentioned electrode blank and the length of often organizing electrode blank are determined, carry out the preparation of electrode blank;
S5: after prepared by electrode blank, starts three-phase slag remelting furnace, is placed in successively in three-phase slag remelting furnace crystallizer by three groups of electrode blanks, carries out the remelting of producing ESR ingot needed for roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510760812.0A CN105331827A (en) | 2015-11-09 | 2015-11-09 | Method for electroslag remelting blank for large MC5 cold roll blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510760812.0A CN105331827A (en) | 2015-11-09 | 2015-11-09 | Method for electroslag remelting blank for large MC5 cold roll blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105331827A true CN105331827A (en) | 2016-02-17 |
Family
ID=55282585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510760812.0A Pending CN105331827A (en) | 2015-11-09 | 2015-11-09 | Method for electroslag remelting blank for large MC5 cold roll blank |
Country Status (1)
| Country | Link |
|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577997A1 (en) * | 1992-06-11 | 1994-01-12 | The Japan Steel Works, Ltd. | Electrode for electroslag remelting and process of producing alloy using the same |
| CN104372177A (en) * | 2014-11-17 | 2015-02-25 | 东北大学 | Large-scale alloy ingot electroslag remelting tube type consumable electrode and preparation method thereof |
-
2015
- 2015-11-09 CN CN201510760812.0A patent/CN105331827A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0577997A1 (en) * | 1992-06-11 | 1994-01-12 | The Japan Steel Works, Ltd. | Electrode for electroslag remelting and process of producing alloy using the same |
| CN104372177A (en) * | 2014-11-17 | 2015-02-25 | 东北大学 | Large-scale alloy ingot electroslag remelting tube type consumable electrode and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 付文逵: "《钢铁冶炼工艺》", 31 January 1981, 机械工业出版社 * |
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Application publication date: 20160217 |