CN106353173A - Rapid ageing detecting method for high-carbon steel wire rod - Google Patents
Rapid ageing detecting method for high-carbon steel wire rod Download PDFInfo
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- CN106353173A CN106353173A CN201610809951.2A CN201610809951A CN106353173A CN 106353173 A CN106353173 A CN 106353173A CN 201610809951 A CN201610809951 A CN 201610809951A CN 106353173 A CN106353173 A CN 106353173A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses a rapid ageing detecting method for a high-carbon steel wire rod. The method comprises the following steps: naturally ageing a high-carbon steel wire rod sample for 0-36 hours; heating the wire rod sample at the temperature of 121-149 DEG C and insulating for 6-16 hours; after heating is finished, cooling the wire rod sample; and then inspecting reduction of area of the wire rod sample, wherein the detected reduction of area is positively related to the reduction of area of the wire rod after natural ageing for 30 days or above. On the basis of researching diffusion velocity of hydrogen atoms in a natural ageing process of the high-carbon steel wire rod, the wire rod is subjected to ageing treatment by a rapid ageing method, after ageing, the reduction of area of the wire rod is detected, and therefore, quick judgment of the quality of the wire rod and just-in-time delivery of orders are realized. The rapid ageing detecting method is a rapid ageing detecting process for high-carbon steel wire rods produced in a steel mill, the reduction of area of the wire rod sample which is subjected to rapid ageing treatment is directly inspected, and an inspection result can accurately evaluate mechanical properties of the wire rod after the wire rod is subjected to natural ageing.
Description
Technical field
The present invention relates to a kind of Technology for Heating Processing of metal material, especially a kind of high-carbon steel wire rod quick timeliness detection side
Method.
Background technology
Mainly for the production of the bridge cable of 1960mpa level, because c constituent content is higher, wire rod rolls high-carbon steel wire rod
During carry out sorbitizing process, rate of cooling is very fast, and its internal hydrogen atom can not spread escape in time, and inside wire rod
Transformation stress and thermal stress are all larger, and after wire rod rolling, plasticity is relatively low, and downstream user cannot directly carry out drawing processing.So disk
Need to carry out escape and the Stress Release of hydrogen by ag(e)ing process after bar rolling, improve wire rod plasticity.When mainly adopting nature at present
Efficacious prescriptions method, aging time is more than 30 days；Due to natural aging time longer it is impossible to complete test of product performance, judgement in time
The reduction of area of product after natrual ageing, can have a strong impact on order and pay.
Content of the invention
When the technical problem to be solved in the present invention is to provide a kind of high-carbon steel wire rod that can effectively judge reduction of area quick
Effect detection method.
For solving above-mentioned technical problem, the method and step that the present invention is taken is: first that the wire rod sample of high-carbon steel is natural
Timeliness 0～36h；Again by wire rod sample in 121～149 DEG C of heating and thermal insulation 6～16h；After the completion of heating, cool down wire rod sample；So
Check the reduction of area of wire rod sample afterwards；Detected it is reduction of area and natrual ageing 30 days and above reduction of area positive correlation.
Wire rod sample of the present invention is cooled to room temperature using air cooling mode.
Have the beneficial effects that using produced by technique scheme: the present invention is to high-carbon steel wire rod Natural Aging Process
On the basis of the diffusion velocity of hydrogen atom is studied, the method using quick timeliness carries out Ageing Treatment to wire rod, after timeliness
The reduction of area performance of wire rod is detected it is achieved that the quick judgement of wire rod quality and user's order are paid in time.
The present invention be directed to the quick timeliness characterization processes of the high-carbon steel wire rod of steel mill's production, through quick Ageing Treatment
Wire rod sample, directly carries out reduction of area inspection, assay can accurate evaluation carry out natrual ageing after wire rod mechanical property
Energy.In the present invention, acid extraction is larger for timeliness influential effect, and the higher then wire rod of heating-up temperature occurs structural transformation,
Temperature is relatively low, and hydrogen atom cannot spread escape completely, so by heating and temperature control in suitable scope；Because carbon contains
Amount is higher, and in organizing after wire rod rolling, cementite ratio increases, and diffusion velocity in ferrite and cementite for the hydrogen atom is not
Same, so needing to determine heat time heating time according to the tissue of wire rod, not only avoiding energy waste but also having made hydrogen atom fully spread escape.
Brief description
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Fig. 1 is wire rod drawing fracture apperance figure after quick timeliness in the embodiment of the present invention 1；
Fig. 2 is wire rod drawing fracture apperance figure after 30 days natrual ageing in the embodiment of the present invention 1；
Fig. 3 is wire rod drawing fracture apperance figure after quick timeliness in the embodiment of the present invention 3；
Fig. 4 is wire rod drawing fracture apperance figure after 30 days natrual ageing in the embodiment of the present invention 3.
Specific embodiment
This high-carbon steel wire rod quick timeliness detection method includes quick ag(e)ing process and detection process；The following institute of concrete technology
State:
1st, the weight percentage of described high-carbon steel wire rod chemical composition is: c0.85～0.91%, si0.20～1.00%,
Mn0.60～0.90%, cr0.25～0.35%, al0.015～0.040%, p≤0.025%, s≤0.025%, v0.02～0.07%,
Cu≤0.20%, ca≤0.0030%, remaining is fe and inevitable impurity element.
2nd, quick ag(e)ing process: a, carry out quick Ageing Treatment before, wire rod sample natural aging time 0～36h,
B, the temperature in heating furnace is risen to 121～149 DEG C, then wire rod sample is placed in heating furnace, be incubated 6～16h.Best
Can be according to carbon content adjustment heat time heating time in wire rod specification (diameter) and steel: wire rod specification is bigger, and the hydrogen of wire rod center is former
The distance that son is diffused into wire rod surface is longer, and the required time is also more；Carbon content is higher, accordingly various carbide hydrogen traps
Quantity increases, and the difficulty that increased hydrogen diffusion is it is therefore desirable to ensure that hydrogen is escaped completely longer heat time heating time.
After the completion of c, heating, wire rod sample is cooled to room temperature using air cooling mode.
3rd, detection process: wire rod sample directly carries out reduction of area inspection, assay being capable of accurate evaluation when carrying out nature
The mechanical property of the wire rod after effect.When the reduction of area of wire rod sample after quick timeliness reach 30% and above when, its corresponding batch
Wire rod after 30 days and above natrual ageing shrinkage can reach 30% and more than, meet downstream user drawing process will
Ask；When the reduction of area of wire rod sample after quick timeliness is less than 30%, the wire rod of its corresponding batch was through 30 days and natural above
After timeliness, shrinkage is less than 30% it may appear that the situation of grinding tool serious wear, drawing fracture.
Embodiment 1: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.85%, si1.00%, mn0.80%, cr0.30%, al0.020%, p0.015%,
S0.010%, v0.02%, cu0.005%, ca0.0010%, remaining is fe and inevitable impurity element；Wire rod ф
12.5mm.
Characterization processes are: wire rod sample elder generation natural aging time 12h, then 121 DEG C of insulation 6h in heating furnace, then adopt
Air cooling mode is cooled to room temperature, and finally detection reduction of area is 40%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 40.4% below, drawing process is smooth.
Fig. 1 is wire rod drawing fracture apperance figure after the quick timeliness of wire rod sample, and Fig. 2 is wire rod drawing after 30 days natrual ageing of wire rod sample
Fracture apperance figure.From Fig. 1,2, two fracture pars fibrosas and radiation area solid colour, boundary is inconspicuous, illustrates that radiation area is tough
Nest amount is also more, is that plasticity preferably shows.
Embodiment 2: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.87%, si0.20%, mn0.60%, cr0.25%, al0.015%, p0.015%,
S0.009%, v0.04%, cu0.009%, ca0.0010%, remaining is fe and inevitable impurity element；Specification is ф
13mm.
Characterization processes are: wire rod sample elder generation natural aging time 7h, then 140 DEG C of insulation 8h in heating furnace, then adopt
Air cooling mode is cooled to room temperature, and finally detection reduction of area is 33%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 32.4% below, drawing process is suitable
Profit.
Embodiment 3: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.91%, si0.50%, mn0.90%, cr0.35%, al0.040%, p0.013%,
S0.011%, v0.07%, cu0.004%, ca0.0011%, remaining is fe and inevitable impurity element；Specification is ф
14mm.
Characterization processes are: wire rod sample elder generation natural aging time 25h, then 149 DEG C of insulation 11h in heating furnace, then adopt
It is cooled to room temperature with air cooling mode, finally detection reduction of area is 28%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 28.2% below, drawing process process
Grinding tool loss is serious, the situation of drawing fracture.Fig. 3 is wire rod drawing fracture apperance figure after the quick timeliness of wire rod sample, Fig. 4
Wire rod drawing fracture apperance figure after 30 days natrual ageing of wire rod sample, from Fig. 3,4, two fracture pars fibrosas and radiation area
Color is significantly different, and boundary is obvious, the at this moment bad typical characteristic of plasticity.
Embodiment 4: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.89%, si0.70%, mn0.75%, cr0.30%, al0.021%, p0.013%,
S0.010%, v0.06%, cu0.008%, ca0.0009%, remaining is fe and inevitable impurity element；Specification is ф
12.5mm.
Characterization processes are: wire rod sample elder generation natural aging time 36h, then 130 DEG C of insulation 16h in heating furnace, then adopt
It is cooled to room temperature with air cooling mode, finally detection reduction of area is 42%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 42.9% below, drawing process is smooth.
Embodiment 5: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.88%, si0.82%, mn0.68%, cr0.31%, al0.033%, p0.025%,
S0.025%, v 0.05%, cu 0.20%, ca0.0030%, remaining is fe and inevitable impurity element；Specification is ф
12.5mm.
Characterization processes are: wire rod sample elder generation natural aging time 0.5h, then 125 DEG C of insulation 15h in heating furnace, then adopt
It is cooled to room temperature with air cooling mode, finally detection reduction of area is 27%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 27.6% below, drawing process process
Grinding tool loss is serious, the situation of drawing fracture.
Embodiment 6: the concrete technology of this high-carbon steel wire rod quick timeliness detection method is as described below.
Wire rod chemical composition is: c0.91%, si0.93%, mn0.72%, cr0.27%, al0.018%, p0.018%,
S0.016%, v 0.03%, cu 0.15%, ca0.0023%, remaining is fe and inevitable impurity element；Specification is ф
13mm.
Characterization processes are: wire rod sample first 145 DEG C of insulation 14h in heating furnace, are then cooled to room using air cooling mode
Temperature, finally detection reduction of area is 36%.
Batch wire rod natrual ageing corresponding to the present embodiment wire rod sample 30 days shrinkage 35.6% below, drawing process is smooth.
Claims (2)
1. a kind of quick timeliness detection method of high-carbon steel wire rod is it is characterised in that methods described step is: first by the disk of high-carbon steel
Bar sample natrual ageing 0～36h；Again by wire rod sample in 121～149 DEG C of heating and thermal insulation 6～16h；After the completion of heating, cooler pan
Bar sample；Then check the reduction of area of wire rod sample；Detected to be with natrual ageing 30 days and above reduction of area just reduction of area
Related.
2. the quick timeliness detection method of high-carbon steel wire rod according to claim 1 it is characterised in that: described wire rod sample is adopted
It is cooled to room temperature with air cooling mode.
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| CN201610809951.2A CN106353173B (en) | 2016-09-08 | 2016-09-08 | The quick timeliness detection method of high-carbon steel wire rod |
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| CN201610809951.2A CN106353173B (en) | 2016-09-08 | 2016-09-08 | The quick timeliness detection method of high-carbon steel wire rod |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202790A (en) * | 2017-06-13 | 2017-09-26 | 南通市产品质量监督检验所 | A kind of high-carbon steel wire rod tissue grain size ranking method |
| CN108950174A (en) * | 2018-07-31 | 2018-12-07 | 河钢股份有限公司承德分公司 | Online aging treatment method and device after a kind of wire rod collection volume |
| CN109762982A (en) * | 2019-03-21 | 2019-05-17 | 张家港荣盛炼钢有限公司 | The artificial aging processing method of carbon steel wire rod with high |
| CN113481360A (en) * | 2021-07-02 | 2021-10-08 | 大连环新精密特钢股份有限公司 | Method and device for quickly aging spring steel wire by hot oil |
| CN114262784A (en) * | 2021-12-31 | 2022-04-01 | 嘉兴市新大金属有限公司 | Low-temperature artificial aging treatment technology for high-carbon steel sample |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107202790A (en) * | 2017-06-13 | 2017-09-26 | 南通市产品质量监督检验所 | A kind of high-carbon steel wire rod tissue grain size ranking method |
| CN108950174A (en) * | 2018-07-31 | 2018-12-07 | 河钢股份有限公司承德分公司 | Online aging treatment method and device after a kind of wire rod collection volume |
| CN109762982A (en) * | 2019-03-21 | 2019-05-17 | 张家港荣盛炼钢有限公司 | The artificial aging processing method of carbon steel wire rod with high |
| CN113481360A (en) * | 2021-07-02 | 2021-10-08 | 大连环新精密特钢股份有限公司 | Method and device for quickly aging spring steel wire by hot oil |
| CN114262784A (en) * | 2021-12-31 | 2022-04-01 | 嘉兴市新大金属有限公司 | Low-temperature artificial aging treatment technology for high-carbon steel sample |
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