CN106180221A - Mould method is joined in a kind of high-strength prestressed steel wire drawing - Google Patents

Abstract

The invention discloses a kind of high-strength prestressed steel wire drawing and join mould method, its method is: by S82B wire rod after wire rod surface acid-washing, bonderizing, go to drawing plant；Using the wire drawing Pei Mo road sub-distribution that S82B wire rod produces in zinc-coated wires through 9 passages: the described front 4 big decrements of passage 20 25%, the 5th passage is middle compression amount, the 6th 9 little decrement of passage 1.5 5% join mould method.The present invention seeks to the S82B wire rod utilizing low cost to join mould method improve intensity and the torsion value of compressor wire by changing the drawing in drawing process, intensity of steel wire during minimizing galvanizing simultaneously and the loss of torsion value, reach the purpose using SWRS82B wire rod to produce Ф 7.0mm1770MPa zinc-coated wire, thus can save substantial amounts of purchase cost, improve Business Economic Benefit, there is good social benefit simultaneously.

Description

Mould method is joined in a kind of high-strength prestressed steel wire drawing

Technical field

The present invention relates to a kind of high-strength prestressed steel wire drawing and join mould method.

Background technology

Galvanized prestressed steel silk is zinc-plated after using high-carbon wire rod wire drawing at present produces through stabilizing treatment again, is drawing During Si, the general way using decrement to gradually reduce produces, and this way is few due to passage, and steel wire torsion value is relatively low, by force Degree rises relatively slow, and steel wire loss of strength and loss of torsion value in hot galvanizing process is relatively big, the zinc-coated wire finished product produced Intensity rank is low, and torsion value is low, does not reaches the high intensity of bridge, the requirement of high torsion value, Jiangsu sand steel Ф 13mmS82B wire rod After using the method to produce, Ф 7.0mm strength of galvanized wire rank is only capable of reaching 1670MPa intensity rank, and uses Baosteel Ф 13mmB87MnQL or nippon Ф 13mmS87BM wire rod can produce Ф 7.0mm1770MPa zinc-coated wire, but wire rod Purchase cost exceed 40-70%.

Tradition wire drawing at present is joined mould method and is caused steel wire torsion value relatively low, and intensity rises relatively slow, and steel wire is at hot galvanizing process Middle loss of strength and the loss of torsion value are relatively big, and the zinc-coated wire product intensity rank produced is low, does not reaches the high-strength of bridge Degree, the requirement of high torsion value.

Summary of the invention

Its purpose of the present invention is that mould method is joined in a kind of high-strength prestressed steel wire drawing of offer, the present invention be utilize low The S82B wire rod of cost is joined mould method by the drawing in change drawing process and is improved intensity and the torsion value of compressor wire, Intensity of steel wire during minimizing galvanizing simultaneously and the loss of torsion value, reach to use SWRS82B wire rod to produce Ф The purpose of 7.0mm1770MPa zinc-coated wire, thus can save substantial amounts of purchase cost, improves Business Economic Benefit, simultaneously There is good social benefit.

The technical scheme realizing above-mentioned purpose and take, including step:

1), by S82B wire rod after wire rod surface acid-washing, bonderizing, drawing plant is gone to；

2) the wire drawing Pei Mo road sub-distribution in 9 passages produce zinc-coated wire of the S82B wire rod, is used: mould passage is joined in described wire drawing Front 4 big decrements 20-27.55% of passage, the 5th passage is middle compression amount, little decrement 1.5-5% of 6-9 passage join mould side Method.

Beneficial effect

Compared with prior art the present invention has the following advantages.

1. concentrate on front 4 passages due to decrement, before passage drawing time due to the slow wire rod of speed or steel wire plastic deformation The heat produced is little, therefore wire rod, steel wire residual stress less, steel wire surface quality is good, will not turn white or produce The phenomenon of raw martensitic structure, because 4 passages use big decrement can improve the intensity of steel wire before this, but will not reduce steel wire and mould Property, especially will not reduce the torsion value of steel wire.

2. little due to 4 passage decrements last after wire drawing drawing, the processing hardening of generation is little, and steel wire caloric value is little, steel wire Using fast speed drawing, the residual stress of steel wire is the least, therefore improves the plasticity of steel wire, particularly improves steel wire torsion value 3-6 time, and drawing speed is brought up to 2.5-3.0m/s by 1.5-2.0m/s, substantially increases speed of production, improves production and produces Amount, can obtain more preferable business efficiency.

3. use low-high-low-high-low mould method of joining to join mould method than tradition and be effectively increased the tough of steel wire after drawing Plasticity, the alternating bending frequency using Ф 13mmSWRS82B wire rod to produce 7.0mm zinc-coated wire is brought up to 11-12 by 8-9 time Secondary, elongation after fracture is brought up to about 5.5% by about 4%, and tensile strength improves 20-30MPa, and torsion value improves 2-3 time.

4. intensity and torsion value when reducing steel-wire galvanizing are lost, and the loss of evenly heat zinc-plated rear intensity of steel wire reduces About 30MPa, torsion value loss reduces 3-5 time.

Detailed description of the invention

A kind of high-strength prestressed steel wire drawing joins mould method, including step:

1), by S82B wire rod after wire rod surface acid-washing, bonderizing, drawing plant is gone to；

2) the wire drawing Pei Mo road sub-distribution in 9 passages produce zinc-coated wire of the S82B wire rod, is used: mould passage is joined in described wire drawing Front 4 big decrements 20-27.55% of passage, the 5th passage is middle compression amount, little decrement 1.5-5% of 6-9 passage join mould side Method.

Embodiment 1

1): by Ф 13mmS82B wire rod after wire rod surface processes (pickling, phosphatization etc.), go to drawing plant；

2): the 1st passage, using the mould of diameter 10.62mm, the contraction percentage of area is 20.10%, and the decrement in 9 passages is distributed as 4th is big, mainly makes wire rod be easily accessible mould, smooth drawing；2nd passage to the 4th passage uses big decrement drawing, wherein The 2nd passage maximum contraction percentage of area is 23.71%, main purpose be front 4 passages complete whole drawing process 78% deformation, And front 4 passages are slow due to drawing speed, the heat that during drawing, steel wire produces rises the highest, do not result in steel wire internal produce a large amount of Residual stress, the plasticity of steel wire and torsion value are declined impact little；5th passage is transition drawing passes, mould diameter 7.50mm, the contraction percentage of area 12.11%, it is in middle equal distribution；6-9 passage, uses little decrement, and mould is distributed as diameter 7.38mm, 7.22mm, 7.07mm, 7.00mm, the contraction percentage of area is distinguished as 3.17%, 4.30%, 4.10%, 1.99%, and the 9th passage is Little, the 6th passage is taken second place, the 3rd, 4 passages relatively big, main purpose reduces steel wire deformation exactly, reduces the surface temperature of steel wire, reduces Steel wire internal residual stress.

Embodiment 2

1): by Ф 13.5mmS82B wire rod after wire rod surface processes (pickling, phosphatization etc.), go to drawing plant；

2): the 1st passage, using the mould of diameter 12.00mm, the contraction percentage of area is 20.98%, and the decrement in 9 passages is distributed as 4th is big, mainly makes wire rod be easily accessible mould, smooth drawing；2nd passage to the 4th passage uses big decrement drawing, wherein The 2nd passage maximum contraction percentage of area is 24.16%, main purpose be front 4 passages complete whole drawing process 78% deformation, And front 4 passages are slow due to drawing speed, the heat that during drawing, steel wire produces rises the highest, do not result in steel wire internal produce a large amount of Residual stress, the plasticity of steel wire and torsion value are declined impact little；5th passage is transition drawing passes, mould diameter 7.60mm, the contraction percentage of area 14.11%, it is in middle equal distribution；6-9 passage, uses little decrement, and mould is distributed as diameter 7.45mm, 7.28mm, 7.10mm, 7.00mm, the contraction percentage of area is distinguished as 3.91%, 4.52%, 4.89%, 2.80%, and the 9th passage is Little, the 6th passage is taken second place, the 3rd, 4 passages relatively big, main purpose reduces steel wire deformation exactly, reduces the surface temperature of steel wire, reduces Steel wire internal residual stress.

Embodiment 3

1): by Ф 10mmS82B wire rod after wire rod surface processes (pickling, phosphatization etc.), go to drawing plant；

2): the 1st passage, using the mould of diameter 8.82mm, the contraction percentage of area is 22.21%, and the decrement in 9 passages is distributed as 4th is big, mainly makes wire rod be easily accessible mould, smooth drawing；2nd passage to the 4th passage uses big decrement drawing, wherein The 2nd passage maximum contraction percentage of area is 24.58%, main purpose be front 4 passages complete whole drawing process 78% deformation, And front 4 passages are slow due to drawing speed, the heat that during drawing, steel wire produces rises the highest, do not result in steel wire internal produce a large amount of Residual stress, the plasticity of steel wire and torsion value are declined impact little；5th passage is transition drawing passes, mould diameter 5.38mm, the contraction percentage of area 16.86%, it is in middle equal distribution；6-9 passage, uses little decrement, and mould is distributed as diameter 5.28mm, 5.15mm, 5.04mm, 5.00mm, the contraction percentage of area is distinguished as 3.66%, 4.87%, 4.23%, 1.61%, and the 9th passage is Little, the 6th passage is taken second place, the 3rd, 4 passages relatively big, main purpose reduces steel wire deformation exactly, reduces the surface temperature of steel wire, reduces Steel wire internal residual stress.

Claims (1)

1. mould method is joined in a high-strength prestressed steel wire drawing, it is characterised in that include step:

1), by S82B wire rod after wire rod surface acid-washing, bonderizing, drawing plant is gone to；

2) the wire drawing Pei Mo road sub-distribution in 9 passages produce zinc-coated wire of the S82B wire rod, is used: mould passage is joined in described wire drawing Front 4 big decrements 20-27.55% of passage, the 5th passage is middle compression amount, little decrement 1.5-5% of 6-9 passage join mould side Method.