CN104588435B - Production method of 2000MPa-level microalloying steel wire for producing ropes - Google Patents

Production method of 2000MPa-level microalloying steel wire for producing ropes Download PDF

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Publication number
CN104588435B
CN104588435B CN201410836355.4A CN201410836355A CN104588435B CN 104588435 B CN104588435 B CN 104588435B CN 201410836355 A CN201410836355 A CN 201410836355A CN 104588435 B CN104588435 B CN 104588435B
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China
Prior art keywords
steel wire
production
2000mpa
equal
wire
Prior art date
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CN201410836355.4A
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Chinese (zh)
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CN104588435A (en
Inventor
赵宪海
王文仲
李宝杰
邢永晟
李建方
薛军
洪光
方国胜
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鞍钢钢绳有限责任公司
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Publication of CN104588435A publication Critical patent/CN104588435A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21CMANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C1/00Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/02Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums

Abstract

The invention relates to a production method of a 2000MPa-level microalloying steel wire for producing ropes. The production method comprises the following steps: (1) carrying out thermal treatment on the steel wire, wherein the thermally processed steel wire meets the following conditions: the sorbitic content is more than or equal to 95%, the decarburization depth is less than or equal to 1%D, the tensile strength is more than or equal to 1250MPa, and the reduction of area is more than or equal to 30%; and (2) drawing 10-12 passes by virtue of multi-block direct feed type wire drawing unit through tension tuning, wherein the partial compression ratio is 15%-20%, the drawing speed does not exceed 4m/s, and the compression ratio of finished products is controlled at 86%-88%. The production method has the advantages that the strength of the steel wire is more than or equal to 2000MPa; compared with production processes in the past, the tenacity index is improved, and the subsequent drawing performance index is met; meanwhile, the performance of the product is improved by controlling the compression.

Description

A kind of 2000MPa level rope making production method of microalloying steel wire

Technical field

The present invention relates to a kind of 2000Mpa level rope making production method of microalloying steel wire.

Background technology

With market, the demand of high intensity, high tenacity, high fatigue property steel wire rope is day by day increased, improving constantly twisting While quality, the production of 2000Mpa level high-quality rope making steel wire is particularly important.

According to original production technology, high intensity, high tenacity, the production of the rope making steel wire of high fatigue property generally adopt Following two approach obtain:

First, improve intensity after the burning of drawing raw material

Including two aspects:1) improve process wire intensity after heat treatment;2) improve the carbon and manganese content of raw material.Shortcoming It is:

Steel wire drawing always expect heat treatment after process wire the sorbite being organized as excellent combination property Tissue, because the sorbite spread is big, between cementite lamella, distance is short, and Ferrite Deformation is vulnerable to obstruction;And the spread is big Sorbite boundary relatively large, during deformation around distortion of lattice big, sliding drag is big, and therefore, the steel wire after cold working is strong Degree is big.Meanwhile, and because thin slice carburizing physical ability bears certain stretcher strain and flexural deformation, toughness index is also very excellent Different.

And in the case that steel grades are certain, obtained process wire after the heat treatment of good sorbite tissue Intensity be there will be no and is obviously improved;

During rope making wire produces at present, 1870Mpa level steel wire generally reaches 0.80% steel grade from C content, in reality In production:

With the increase of phosphorus content, the ferrite lamella in process wire tissue after heat treatment is thinning, and carburizing The thickness of body lamella increases.For intensity angle, ferrite lamella is thinner, and intensity is higher, but to consider from ductility, ferrite Lamella is thinning to reduce ductility;

With the increase of phosphorus content, the first analysis cementite that crystal boundary exists also affects moulding, especially in crystal boundary When the thickness of upper cementite is more much bigger than cementite lamellar spacing, it will cause moulding significantly decline, therefore, with carbon containing The raising of amount, steel grade carbon, the component segregation of manganese element will have a strong impact on the moulding of steel wire;With the increase of the carburizing scale of construction, ooze The deformation of carbon body will affect drawing processing after steel wire moulding.

2nd, improve total draught

For the 2000Mpa level rope making wire that needs in producing, generally adopt between big compression ratio 87~92%, multi-pass The production technology of (10~12 passage drawing) carries out drawing production.

Shortcoming is:Increase (after total draught is more than 84%) with total draught, deflection increases, and metal inside is brilliant Grain constantly sliding.The dislocation producing in minimizing with slip system and lattice is reversed, and hinders the carrying out of deformation, so steel wire resists Tensile strength raises, and the toughness index such as elongation percentage, the contraction percentage of area, alternating bending frequency declines.

Therefore, the research and development of 2000Mpa level rope making steel wire need from raising high intensity, high cleanliness steel grade, corresponding heat Handling process, Steel Wire Drawing Process improve.

Content of the invention

For overcoming the deficiencies in the prior art, it is an object of the invention to provide a kind of 2000Mpa level rope making micro alloyed steel The production method of silk, improves toughness, improves steel wire properties, meets rope making needs.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of 2000Mpa level rope making production method of microalloying steel wire, comprises the following steps:

1) after heat treatment, process wire meets:Sorbite percentage >=95%;Decarburized layer deepness≤1%D;Tensile strength: ≥1250MPa;Reduction of area:>=30%;

2) tension force tuning, multiple roller straight drawing machine group are adopted, drawing passes is in 10~12 passages, Partial shrinkage rate 15 ~20%;Drawing speed is less than 4m/s;Finished product compression ratio finally controls 86~88%.

Compared with prior art, the invention has the beneficial effects as follows:

Achieve steel wire intensity of steel wire >=2000MPa, toughness index compared with conventional production technology, is improved, wherein: The bending index of steel wire improves 30% compared with like product;The strand of steel wire twisting, after dissolution of partnership, compared with like product fatigue behaviour Improve 20%.Choose specific process wire, to meet follow-up drawing property index;Meanwhile, compression is controlled to improve product Performance.

Specific embodiment

Below the present invention is described in detail, it should be noted that the enforcement of the present invention is not limited to following embodiment party Formula.

A kind of 2000Mpa level rope making production method of microalloying steel wire,

1st, after heat treatment steel wire properties index rationally set up to meet follow-up drawing property index, heat treatment is later half The performance of finished product steel wire should meet and requires, and be shown in Table 1:

Table 1

2nd, rational steel wire drawing total draught, makes finished product compression ratio finally control 86~88%;

1) advanced tension force tuning, multiple roller straight drawing machine group are adopted, drawing passes is pressed in 10~12 passages, part Shrinkage 15~20%, realizes small deformation, multi-pass, homogeneous deformation;

2) adjust acid washing phosphorization technique, prevent the phenomenons such as overpickling, hydrogen embrittlement from producing;

3) control drawing speed, less than 4m/s, reduce the impact to performance for the heating.

Embodiment 1:

Taking 2.45mm Production for Steel Wire as a example:

1st, process wire line footpath is 6.8mm, produces through rationalization's heat treatment, and the product steel wire properties of accomplishing are shown in Table 2.

Table 2 heat treatment surveys index

2nd, main drawing process parameter is shown in Table 3

Table 3

Each passage drawing parameter is shown in Table 4

Table 4

Each passage 1 2 3 4 5 6 7 8 9 10 Diameter mm 6.20 5.51 4.91 4.40 3.95 3.57 3.23 2.94 2.68 2.45 Compression ratio % 17 21 20.4 19.8 19.2 18.6 18 17.4 16.8 16.2

Embodiment 2:

Taking 2.55mm Production for Steel Wire as a example:

1st, process wire line footpath is 7.2mm, produces through rationalization's heat treatment, and process wire performance is shown in Table 5.

Table 5 heat treatment surveys index

2nd, main drawing process parameter is shown in Table 6

Table 6

Each passage drawing parameter is shown in Table 7

Table 7

Each passage 1 2 3 4 5 6 7 8 9 10 Diameter mm 6.54 5.8 5.17 4.62 4.14 3.73 3.37 3.06 2.79 2.55 Compression ratio % 17.5 21.3 20.7 20.1 19.5 18.9 18.3 17.7 17.1 16.5

Claims (2)

1. a kind of 2000Mpa level rope making with the production method of microalloying steel wire it is characterised in that 2.45mm Production for Steel Wire:Half Finished product wire footpath is 6.8mm, produces through rationalization's heat treatment, and process wire performance is shown in Table 1;
Table 1 heat treatment surveys index:
Main drawing process parameter is shown in Table 2:
Table 2
Each passage drawing parameter is shown in Table 3:
Table 3
2. a kind of 2000Mpa level rope making with the production method of microalloying steel wire it is characterised in that 2.55mm Production for Steel Wire:Half Finished product wire footpath is 7.2mm, produces through rationalization's heat treatment, and process wire performance is shown in Table 4;
Table 4 heat treatment surveys index:
Main drawing process parameter is shown in Table 5;
Table 5:
Each passage drawing parameter is shown in Table 6;
Table 6:
CN201410836355.4A 2014-12-28 2014-12-28 Production method of 2000MPa-level microalloying steel wire for producing ropes CN104588435B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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CN201410836355.4A CN104588435B (en) 2014-12-28 2014-12-28 Production method of 2000MPa-level microalloying steel wire for producing ropes

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