CN104624680A - Method for producing significant-purpose steel wire for manufacturing rope - Google Patents

Abstract

The invention relates to a method for producing a significant-purpose steel wire for manufacturing a rope. The method comprises the following production processes: coiling, performing acid pickling rusting, pulling a half-finished product, performing EDC coiling, pulling a finished product steel wire, and inspecting the steel wire, and comprises the following production steps: (1) after the half-finished product is pulled, performing EDC coiling, soaking a coiled strip in an austenite state into water and cooling rapidly, thereby obtaining austenite texture, wherein the austenite rate is 85-95%; and (2) according to a Linhof equation as shown in the specification, enabling the strength of the finished product steel wire and the strength of a raw material are in a linear relationship, wherein the pull resistance sigma c of the EDC coiled strip is 1050-1120Mpa. The method has the advantages that the experiment shows that the significant-purpose steel wire which is pulled by using the method and is used for manufacturing the rope can meet relevant requirements in the national standard (YB/T5343-2009). The technical indexes of the product completely meet the national standard and use requirements.

Description

A kind of rope making important use Production for Steel Wire method

Technical field

The present invention relates to a kind of rope making important use Production for Steel Wire method.

Background technology

Rope making is with important use steel wire mainly for the production of GB8918 standard Wire Rope for Important Use, and comparatively steel wire rope for general use is more crucial because of use occasion for Wire Rope for Important Use, therefore, very high to the performance requirement of steel wire.

In conventional method, the technological process of production of rope making important use steel wire is:

Wire rod → pickling rustization → semi-finished product drawing → heat treatment, lead bath process → finished product, part medium-small diameter kind also needs to carry out the drawing of secondary semi-finished product and heat treatment.From above whole technological process, also exist: the product manufacturing cycle is long, artificial and logistics cost large, consume the shortcomings such as high.

At rope making general-purpose wire and spring steel wire production field, also occur adopting common wire rod direct drawing to carry out the technique of finished product Production for Steel Wire, but because common gren rod metallographic structure is uneven, and sorbitic rate is low, there is a large amount of pearlitic structrures, and having ferrite net (sub-eutectoid steel) or the network cementite (hypereutectoid steel) of some, the finished product steel wire ubiquity intensity obtained after direct drawing is low, bending and reverse index and can not meet the shortcomings such as Standard, combination property be unstable; In addition, limit by traditional hot rolling technology, wire rod surface easily produces decarburization thus reduces steel wire wearability.

Summary of the invention

For overcoming the deficiencies in the prior art, the object of this invention is to provide a kind of rope making important use Production for Steel Wire method, under meeting the prerequisite of combination property, reducing production link (heat treatment), enhancing productivity, reducing production cost.

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

A kind of rope making important use Production for Steel Wire method, production process is: wire rod → pickling rustization → semi-finished product drawing → EDC wire rod → finished product steel wire drawing → steel wire inspection, comprises the following steps:

1) after semi-finished product drawing, carry out EDC wire rod, the wire rod of austenitic state is immersed in the water quick cooling, obtain sorbite tissue, sorbitic rate is 85% ~ 95%;

2) according to Tu Linkefu formula, finished product intensity of steel wire and raw material intensity linear:

${\mathrm{\σ}}_c={\mathrm{\σ}}_y\sqrt{\frac{D}{d}};$

In formula, σ _cfor finished product intensity of steel wire; σ _yfor raw material intensity of steel wire; D, d are respectively finished steel filament diameter and raw steel filament diameter; Draw EDC wire rod tensile strength sigma _cfor 1050Mpa ~ 1120Mpa;

3) end product drawing total draught is 83% ~ 88%.

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

Through test, the rope making important use steel wire after this method drawing is adopted to meet related request in GB (YB/T5343-2009).Technical target of the product meets GB and instructions for use completely; Reduce rough, pickling process, heat treatment step, cost can reduce by 500 ~ 700 yuan/ton.Not leaded in the technological process of production, stop the lead contamination of manufacturing enterprise.

Detailed description of the invention

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

A kind of rope making important use Production for Steel Wire method, production process is: wire rod → pickling rustization → semi-finished product drawing → EDC wire rod → finished product steel wire drawing → steel wire inspection, wherein EDC (online water patent) wire rod refers to, in wire production process, the wire rod of austenitic state is immersed in the water quick cooling, obtain the sorbite tissue close with patenting, sorbitic rate is significantly improved than conventional stelmor cooling method, through inspection, EDC wire rod sorbitic rate can reach 85% ~ 95% can be directly used in deep processing, so just can remove follow-up lead bath heat treatment step from, both can be cost-saving for rope making enterprise, the pollution that lead bath brings can be avoided again.

After adopting EDC wire rod, rope making important use steel wire production process flow process is adjusted to: EDC wire rod → finished product steel wire drawing → steel wire inspection.

1) end product drawing total draught is increased:

According to Tu Linkefu formula:

in formula, σ _crepresent finished product intensity of steel wire; σ _yrepresent raw material intensity of steel wire; D, d represent finished steel filament diameter and raw steel filament diameter respectively.According to formula, finished product intensity of steel wire and raw material intensity linear.

Draw: EDC wire rod tensile strength is between 1050Mpa ~ 1100Mpa scope, improve 2 ~ 5% than common wire rod strength range (1000Mpa ~ 1050Mpa), but comparatively low by 5 ~ 10% with the later half product intensity of diameter heat treatment lead bath (between 1150Mpa ~ 1180Mpa).To produce the basically identical steel wire of intensity, on the basis of original lead bath rerolled steel filament diameter, increase stock diameter, end product drawing total draught 2 ~ 5%.

2) reduce passage, increase Partial shrinkage rate:

While employing increases end product drawing total draught method, also can adopt minimizing drawing passes, improve average portion compression ratio 2 ~ 5%, the method increasing single pass heavy deformation improves intensity.

EDC wire rod index is as follows in table 1:

Table 1

Embodiment:

For Φ 2.0mm1670MPa level and 1770MPa level important use rope making wire:

One, EDC wire rod index is as following table 2:

Two, total draught is improved:

Example 1: in table 3;

Table 3 1670MPa level important use rope making steel wire

Compression ratio improves 5%, and the drawing effect obtained is consistent.

Example 2: in table 4;

Table 4 1770MPa level important use rope making steel wire

Compression ratio improves 2.7%, and the drawing effect obtained is basically identical.

Three, reduce drawing passes, improve Partial shrinkage rate

Example 1: in table 5;

Table 5 1670MPa level important use rope making steel wire

Partial shrinkage rate improves 3.55%, and the drawing effect obtained is consistent.

Example 2: in table 6;

Table 6 1770MPa level important use rope making steel wire

Partial shrinkage rate improves 3.39%, and the drawing effect obtained is consistent.

Obtaining steel wire qualification rate is 96 ~ 98%, meets and estimates requirement.

Claims (1)

1. a rope making important use Production for Steel Wire method, it is characterized in that, production process is: wire rod → pickling rustization → semi-finished product drawing → EDC wire rod → finished product steel wire drawing → steel wire inspection, comprises the following steps:

1) after semi-finished product drawing, carry out EDC wire rod, the wire rod of austenitic state is immersed in the water quick cooling, obtain sorbite tissue, sorbitic rate is 85% ~ 95%;

2) according to Tu Linkefu formula, finished product intensity of steel wire and raw material intensity linear:

${\mathrm{\σ}}_c={\mathrm{\σ}}_y\sqrt{\frac{D}{d}};$

In formula, σ _cfor finished product intensity of steel wire; σ _yfor raw material intensity of steel wire; D, d are respectively finished steel filament diameter and raw steel filament diameter; Draw EDC wire rod tensile strength sigma _cfor 1050Mpa ~ 1120Mpa;

3) end product drawing total draught is 83% ~ 88%.