CN1120761C - High-alloy wire and rod material production technology flow and mill train - Google Patents

High-alloy wire and rod material production technology flow and mill train Download PDF

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CN1120761C
CN1120761C CN 98124855 CN98124855A CN1120761C CN 1120761 C CN1120761 C CN 1120761C CN 98124855 CN98124855 CN 98124855 CN 98124855 A CN98124855 A CN 98124855A CN 1120761 C CN1120761 C CN 1120761C
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rolling
mill
semi
unit
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CN1214967A (en
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方崇实
方钧
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Abstract

The present invention relates to a high alloy wire and rod production process flow and a mill line. The production process flow comprises: high alloy molten metal is directly poured into an electroslag semi-continuous casting device, and is made into a metal ingot by semi-continuous casting; the hot ingot which is heated is cogged down by 2 to 4 three-roll spiral skew rolling mills, and then the ingots enter multiple double type semi-continuous rolling roughing mill lines without torsion and tension, which are arranged in a row; the ingots are rolled into alloy rods by a rough rolling end frame rolling mill group, or the ingots are rolled into alloy wires by multiple double type semi-continuous rolling finishing roll lines without torsion and tension, which are arranged in a row, and a finish rolling end frame rolling mill group, and the rolling pieces are guided by a flat repeater. The high alloy wire and rod production mode which has the advantages of material forming by one fire, short process, high efficiency and flexibility can save energy by 50% to 60%, increase the success ratio by 20% to 30%, and reduce the cost by 30% to 40%.

Description

A kind of high-alloy wire and rod material short-flow production method
Technical field
The present invention relates to a kind of high zygonema rod material production technology flow and mill train, promptly a kind of high-alloy wire and rod material short-flow production method and apparatus arrangement method.
Background technology
The technological process of production of existing high-alloy wire and rod material and wire and bar mill machine row, with and existing problem as follows.The high alloy material of our indication is not only those difficult high-alloy steel that is out of shape, as a class valve steel, Cr25Ni20 heat resisting steel etc. such as the high-speed steel of the various trades mark, alloy tool steel, high nickel chromium triangle two-phase welding rod steel, 21-4N, also comprise iron-base superalloy, nickel base superalloy.This class material is very important in national economy, but compares with general steel, and the annual demand of each material is not a lot, and specific to the line bar, the annual demand major part of each above-mentioned material is in the hundreds of ton in the scope of several kilotons.Yet bringing a high price of these high-alloy wire and rod material material, partly reaches 10~200,000 yuan/ton by general 2~50,000 yuan/ton.The characteristics of this class high-alloy wire and rod material of modern production are long flow processs, as the maturation process flow process of modern production high speed steel wire rod, are example with the high speed steel wire rod production line of KREFELD factory of German TEW company:
Smelt (15 tons of electric arc furnaces, 30 tons of charged magnetic stir electric arc furnaces, chemical analysis is decided carbon with infrared ray, sulphur, direct reading spectrometry W, Mo, Cr, V, microcomputer control, automatic video data) → method of making a bet casting (800,600,500 kilograms of sides, billet) → (2000 tons of fast forgings are split into 220 square billets in heating (the red commentaries on classics of steel ingot) → cogging, two sections of thermal cuttings) → (1000 tons of finish forges are split into 90~120 square billets in heating (the red annular furnace that changes over to) → secondary cogging, thermal cutting) → stress relief annealing → aligning → ball blast scales → ultrasonic wave, eddy current inspection → reconditioning, (totally 22 the branch four groups) tandem rolling that strips off the skin → walking-beam furnace heating → flat vertical miller group become 28 millimeters of medium and small-scale material and Φ 5.5~Φ coil → the controlled atmosphere roller at the bottom of stove and controlled atmosphere bell-type furnace annealing, through four pyrogene materials.
One class valve steel modern production technology such as 21-4N is similar with high-speed steel basically, but because hot-rolled finished product is not accurate round steel, will annealing after the hot rolling, pickling, cold-drawn, annealing, and production procedure is longer, more complicated.In addition, high nickel chromium triangle two-phase welding rod steel, heat resisting steel and high temperature alloy still will forge and reconditioning through too much fire before tandem rolling.
The high alloy material that the deficiency of this long flow process is 1, be made up of noble metal in process of production because excision cap mouth, repeatedly cutting head cutting tail, heating for multiple times scaling loss, repeatedly reconditioning and rolling in middle waste product, cause total lumber recovery lowly (40~70%) and processing charges height; 2, many fire heating and lumber recovery are low, cause unit product total energy consumption height; 3, the inside of steel ingot is micro-and slightly look defective and cause end product quality not high, as thick inhomogeneous, the thick net carbide existence of crystal grain, gas, be mingled with etc.; 4, the tandem rolling mode causes the tandem rolling parameter can not adapt to all steel grades, produces any specification product difficulty, the accurate line bar of production specification difficulty, middle waste product be many.In a word, lack the desired flexibility of the various high alloy steel of production.
The developing direction in high-alloy steel and alloy wire bar market is both at home and abroad at present: 1, diversification of varieties, and specification, model get more and more, and difficult-to-deformation material is more and more; 2, quality requirement is more and more higher; 3, batch size of order is fewer and feweri, and contract for future delivery much is that the hundreds of kilogram is to several tons; 4, delivery date is shorter and shorter: 5, require to reduce the high alloy material price.Obviously, these requirements are not satisfied in the technological process of current domestic and international production high alloy material.
The mill train of current production high-alloy wire and rod material mainly is: 1, tandem mill row, they are divided into flat-upright roughing unit and Mo Gen does not have to turn round and parts mm finishing mill unit and Y shape three-roll continuous rolling unit a little, its common ground all is to interrelate with big steel-making and big substance, large-scale production, contradict with the developing direction in above-mentioned high alloy material market, lack flexibility.One cover tandem rolling parameter fixedly pass what all roll, what all rolls bad, cause total lumber recovery to descend, Y shape three-high mill also only is used for producing limited steel grade in actual production, look after the steel alloy fair average quality, and concerning the high alloy material with very high calorific intensity, the similar root unit overhang roll that rubs can't be produced at all smoothly; 2, the continuous guide mill of Sweden, specialized designs is used for producing steel alloy, but accident is frequent, and total lumber recovery is too low, and is no longer newly-built; 3, old open-train mill its high advantage is flexibly arranged, but substance is little, efficient is low, does not also meet the requirement in current high-alloy wire and rod material market when producing the high-alloy wire rod.
Summary of the invention
Purpose of the present invention is exactly at the defective of prior art and deficiency, a new technological process is proposed, it is a kind of high-alloy wire and rod material short-flow production method, according to this method, can realize short flow process, high efficiency, low cost, high-quality, produce various all kinds of high alloy material line bars neatly, fundamentally solve the problem that current domestic and international production high alloy material line bar exists.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of high-alloy wire and rod material short-flow production method, comprise step:
1) produces high-alloy metal liquid by medium-frequency induction furnace;
2) high-alloy metal liquid is directly poured into the electroslag semi-continuous casting device, D.C.casting becomes ingot;
3) ingot is after the finishing department finishing, and the heating furnace of packing into heats;
4) ingot after the heating is sent into 2~4 three roller spiral skew rolling mills through roller-way and is carried out cogging;
5) blank after the cogging enters double two type that line arranges does not have and turns round that not have the semi-tandem rolling roughing train of opening rolling, and enters last frame sizing unit and shut out alloy bar material.Further can comprise step:
6) do not have to turn round not have by the double two type of step 5) and open the thick alloy bar material that the semi-tandem rolling roughing train shuts out and enter finishing mill line through flat repeater guiding;
7) double two type of arranging through line does not again have and turns round that not have the semi-tandem rolling finishing mill line of opening rolling, and enters last frame sizing unit and shut out alloy wire.
The double two type that described line is arranged does not have to turn round not have to be opened semi-tandem rolling roughing train and double two type and not to have to turn round and do not have the method for arranging of opening the semi-tandem rolling finishing mill line and be selected from one of two kinds, a kind of is the method for arranging of forming when adopting Y shape three-high mill, and another kind is the method for arranging of forming when adopting short stress path rolling mill.
The method for arranging of forming during described employing Y shape three-high mill, wherein each first road milling train of organizing double unit is transmission Y shape three-high mill, the second road milling train is underdrive Y shape three-high mill, guide rolled piece by flat repeater between each milling train unit, all in a horizontal plane, all each rolling mills are transmission separately all for all flat repeaters.
The method for arranging of forming during described employing short stress path rolling mill, wherein each first rolling mill and second rolling mill of organizing in the double unit is corresponding respectively, be mutually and be arranged vertically, each with ground in angle of 45 degrees, guide rolled piece by flat repeater between each double unit, all flat repeaters all in a horizontal plane, laterally alternately arrange to shorten the lateral separation between unit by each double unit.
New production method can simply be expressed as follows:
Do not have to turn round and do not have the semi-tandem rolling roughing train (Y shape three-high mill or short stress path rolling mill) of opening and shut out bar → line double two type and do not have to turn round and do not have the semi-tandem rolling finishing mill line (Y shape three-high mill or short stress path rolling mill) of opening and shut out furnace treatment reason at the bottom of wire rod finished product → roller 0.5~1 ton of intermediate frequency furnace smelting → liquid metals electroslag semi-continuous casting spindle → → three spiral skew rolling mills of walking beam furnace heating cogging goes out round rolled piece → line double two type.
Contrast new and old two kinds of technological processes, visible advantage of the present invention: 1, flow process is short, electroslag remelting spindle one-heating forming; 2, flexibility is big, and smelting aspect bogey changes kind in small lot ground rapidly, and rolling aspect can be changed specification arbitrarily; On the spiral skew rolling mill, can go out 110 millimeters accurate round steel of Φ 50~Φ, on the roughing unit, can go out 50 millimeters bars of Φ 12~Φ, on mm finishing mill unit, can go out 12 millimeters wire rods of Φ 5~Φ; 3, line bar quality is good, smelts and adopts the electroslag new technology can guarantee metallurgical quality, and rolling employing screw rolling and first feed mill, finish rolling round steel unit have guaranteed minimum dimension tolerance and the inside and outside quality of stocking; 4, remarkable in economical benefits, ton product total energy consumption descends 50~60% at least, and total lumber recovery improves 20~30%, and totle drilling cost descends 30~40%.
Description of drawings
Fig. 1 is technological process of the present invention and the total schematic diagram of apparatus arrangement;
Fig. 2 is the layout drawing of three spiral skew rolling mills and Y shape three-high mill machine row;
Fig. 3 is that double two type does not have the schematic diagram that the nothing turned round is opened a unit of semi-tandem rolling milling train;
Fig. 4-the 1st, the front elevational schematic of last transmission Y shape three-high mill support and transmission system; (arc triangle pass)
Fig. 4-the 2nd, the schematic top plan view of last transmission Y shape three-high mill support and transmission system; (arc triangle pass)
Fig. 5-the 1st, the front elevational schematic of underdrive Y shape three-high mill support and transmission system; (circular hole)
Fig. 5-the 2nd, the schematic top plan view of underdrive Y shape three-high mill support and transmission system; (circular hole)
Fig. 6 is the layout drawing of three screw rolling mills and short stress path rolling mill machine row;
Fig. 7 is the scheme of installation of short stress path rolling mill (at 45 with ground);
Fig. 8 is the scheme of installation with another short stress path rolling mill (becoming anti-45 ° with ground) of same group of short stress milling train shown in Figure 7;
Fig. 9 does not have and to turn round and do not have the front view of opening the short stress path rolling mill unit (ellipse advance circle);
Figure 10 does not have and to turn round and do not have the vertical view of opening the short stress path rolling mill unit (ellipse advance circle).
The specific embodiment
Introduce embodiments of the invention below in conjunction with accompanying drawing:
The invention provides a kind of high-alloy wire and rod material short-flow production method, its production procedure and mill train are as shown in Figure 1, it comprises six medium-frequency induction furnaces 2, high-alloy metal liquid is provided, change slag hearth 4 for two, 12 liquid metals electroslag semi-continuous casting devices 3, an ingot heating furnace 6, three three roller spiral skew rolling mills 8 are arranged on roll line, 10,12 and roller- way 7,9,11,13, and a series of Y shape three-high mills or short stress path rolling mill, get smelting required raw material and auxiliary material ready in raw material workshop section 1, delivering to medium-frequency induction furnace 2 smelts, the high-alloy metal liquid of producing directly pours into liquid metals electroslag semi-continuous casting device 3, D.C.casting becomes ingot (130 millimeters of Φ 80~Φ), change slag hearth 4 for two and guarantee the melt cinder supply, ingot is after finishing department 5 finishing, in time attire enters heating furnace 6, heating after heat ingot is through roller-way 7, three three roller spiral skew rolling mills 8 by file, 10,12 carry out cogging, shut out 60 millimeters round bases of Φ 50~Φ, blank enters double two type that line arranges does not then have to turn round and does not have the thick machine row 14~21 of semi-tandem rolling of opening, shut out 50 millimeters high alloy bars of Φ 12~Φ by roughing end rolling mill group 21, send into the wire rod cooling, the slow cooling district, or the double two type of arranging through line does not again have the nothing turned round semi-tandem rolling finishing mill line 22~29, shut out 12 millimeters high alloy wire rods of Φ 5~Φ by finish rolling end rolling mill group 29, send into the wire rod cooling, the slow cooling district, when rolled piece enters next double unit from a double unit, by flat repeater 62~74,113~124 guiding.
Double two type does not have the nothing turned round semi-tandem rolling roughing train 14~21 and double two type does not have the nothing turned round semi-tandem rolling finishing mill line 22~29 and roughing end rolling mill group 21 and the last rolling mill group 29 of finish rolling, form by Y shape three-high mill, each first road milling train of organizing double unit is transmission Y shape three-high mill 30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60, the second road milling train is underdrive Y shape three-high mill 31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61, guide rolled pieces by flat repeater 62~74 between each milling train unit, all flat repeaters are all in a horizontal plane, all each rolling mills 75,132 all transmissions separately, reductor 77, the a pair of angular wheel 78 of 134 high speed axle head, 79 and 84,146 through power transmission shaft 80,147 draw direct current generator outside the machine row, can shorten the lateral separation between each milling train unit.
Double two type does not have the nothing turned round semi-tandem rolling roughing train 14~21 and double two type does not have the nothing turned round semi-tandem rolling finishing mill line 22~29 and roughing end rolling mill group 21 and the last rolling mill group 29 of finish rolling, also can form by the short stress path rolling mill unit, each organizes first rolling mill 81 in the double unit, 83,85,87,89,91,93,95,97,99,101,103,105,107,109,111 and second rolling mill 82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112 respectively correspondence be mutually and be arranged vertically, each and ground angle at 45, each double unit is laterally alternately arranged, can shorten the lateral separation between unit significantly, by shaft coupling 128~131 and 141~144 and hydraulic means 137,150, change groove with mobile milling train.
The last preceding unit 42 of first line in the Y shape three-high mill machine row, 43 and last unit 44,45 is a combination, unit 42 before last, 43 is unordered size adjusting tube reducing unit, last unit 44,45 is the unordered size adjusting sizing of accurate round steel unit, to produce high alloy bar (50 millimeters of Φ 12~Φ), the last preceding unit 58 of second line, 59 and last unit 60,61 is another combination, unit 58 before last, 59 is unordered size adjusting tube reducing unit, last unit 60,61 is the unordered size adjusting sizing of accurate round steel unit, to produce high alloy wire rod (12 millimeters of Φ 5~Φ).
In the short stress path rolling mill machine row, the last preceding unit 93 of first line, 94 and last unit 95,96 is a combination, unit 93 before last, 94 is unordered size adjusting tube reducing unit, last unit 95,96 is the unordered size adjusting sizing of accurate round steel unit, to produce high alloy bar (50 millimeters of Φ 12~Φ), the last preceding unit 109 of second line, 110 and last unit 111,112 is another combination, unit 109 before last, 110 is unordered size adjusting tube reducing unit, last unit 111,112 is the unordered size adjusting sizing of accurate round steel unit, to produce high alloy wire rod (12 millimeters of Φ 5~Φ).When changing specification,, change roll at most, and, can realize unordered adjustment size without mill stand change by changing groove.Specifically, shown in accompanying drawing 7~10, roll 126,127 in the short stress path rolling mill seat 125,138 and 139,140 is through can inserting in the tooth shell type shaft coupling 128,129 and 141,142 that links with the disjunctor support by axially movable tooth joint 130,131,143,144 of linking with it, and deceleration and the conjuncted case of split axle link with direct current generator respectively through shaft coupling.Two rolling mill rolls rely on movable base 135,148 and firm banking 136,149 and move axially and adjust hydraulic means 137,150 by 45 ° of intersection centrings, intersect and move the replacing pass.

Claims (5)

1. a high-alloy wire and rod material short-flow production method is characterized in that, comprises step:
1) produces high-alloy metal liquid by medium-frequency induction furnace (2);
2) high-alloy metal liquid is directly poured into electroslag semi-continuous casting device (3), D.C.casting becomes ingot;
3) ingot is after finishing department (5) finishing, and the heating furnace of packing into (6) heats;
4) ingot after the heating is sent into 2~4 three roller spiral skew rolling mills (8,10,12) through roller-way (7,9,11,13) and is carried out cogging;
5) blank after the cogging enters double two type that line arranges does not have and turns round that not have the semi-tandem rolling roughing train (14~20) of opening rolling, and enters last frame sizing unit (21) and shut out alloy bar material.
2. high-alloy wire and rod material short-flow production method according to claim 1 is characterized in that, further comprises step:
6) do not have to turn round not have by the double two type of step 5) and open the thick alloy bar material that semi-tandem rolling roughing train (14~20) shuts out and enter finishing mill line through flat repeater guiding;
7) double two type of arranging through line does not again have and turns round that not have the semi-tandem rolling finishing mill line (22~28) of opening rolling, and enters last frame sizing unit (29) and shut out alloy wire.
3. high-alloy wire and rod material short-flow production method according to claim 1 and 2, it is characterized in that, the double two type that described line is arranged does not have to turn round not have to be opened semi-tandem rolling roughing train (14~20) and double two type and not to have and turn round the method for arranging that does not have a semi-tandem rolling finishing mill line (22~28) and be selected from one of two kinds, a kind of is the method for arranging of forming when adopting Y shape three-high mill, and another kind is the method for arranging of forming when adopting short stress path rolling mill.
4. high-alloy wire and rod material short-flow production method according to claim 3, it is characterized in that, the method for arranging of forming during described employing Y shape three-high mill, wherein each first road milling train of organizing double unit is transmission Y shape three-high mill (30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60), the second road milling train is underdrive Y shape three-high mill (31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61), guide rolled piece by flat repeater (62~74) between each milling train unit, all flat repeaters all in a horizontal plane, all each rolling mills (75,132) all transmissions separately.
5. high-alloy wire and rod material short-flow production method according to claim 3, it is characterized in that, the method for arranging of forming during described employing short stress path rolling mill, wherein each organizes first rolling mill (81 in the double unit, 83,85,87,89,91,93,95,97,99,101,103,105,107,109,111) and second rolling mill (82,84,86,88,90,92,94,96,98,100,102,104,106,108,110,112) corresponding respectively, be mutually and be arranged vertically, each with ground in angle of 45 degrees, guide rolled piece by flat repeater (113~124) between each double unit, all flat repeaters all in a horizontal plane, laterally alternately arrange to shorten the lateral separation between unit by each double unit.
CN 98124855 1998-11-23 1998-11-23 High-alloy wire and rod material production technology flow and mill train Expired - Fee Related CN1120761C (en)

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Application Number Priority Date Filing Date Title
CN 98124855 CN1120761C (en) 1998-11-23 1998-11-23 High-alloy wire and rod material production technology flow and mill train

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CN1120761C true CN1120761C (en) 2003-09-10

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