CN107841708A - A kind of piercing plug for seamless steel tubes surface infiltration layer technique - Google Patents
A kind of piercing plug for seamless steel tubes surface infiltration layer technique Download PDFInfo
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- CN107841708A CN107841708A CN201711077533.XA CN201711077533A CN107841708A CN 107841708 A CN107841708 A CN 107841708A CN 201711077533 A CN201711077533 A CN 201711077533A CN 107841708 A CN107841708 A CN 107841708A
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- product
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- seamless steel
- infiltration layer
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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
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
- C21D9/085—Cooling or quenching
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
- C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
- C23C8/68—Boronising
- C23C8/70—Boronising of ferrous surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention relates to a kind of piercing plug for seamless steel tubes surface infiltration layer technique, it is characterised in that the handling process comprises the following steps：Annealing, Bononizing pretreatment, Quenching Treatment, temper, by changing parameter of the product in quenching and tempering technique, it is in secondary troostite+martensite using matrix after 1060 DEG C of air cooling+lonneals, tissue becomes tiny, boride layer obtains further diffusion, and with the change alloying layer thickness increase of infiltration layer boron concentration, fragility improves, measurement hardness substantially increases, and is advantageous to increasing the service life for top.
Description
Technical field
The present invention relates to seamless steel pipe technical field, especially a kind of piercing plug for seamless steel tubes surface infiltration layer technique.
Background technology
Hot rolled seamless steel tube production is the major die used during top, while is also main consumable accessory.Because top is
Worked under conditions of high temperature, high pressure and rapid heat cycle, undergo the effect of mechanical fatigue and heat fatigue, therefore most tops are main
Failure mode be because heat resistance, thermal fatigue property deficiency and ftracture, production requirement can not be met caused by step on nose.GCr15 steel without
Stitch in steel pipe poling, being averaged for top wears the steel pipe life-span at 50.Due to the calorific intensity performance of existing heading material, heat treatment matter
The reasons such as amount are limited so that its service life is not high, thus influences steel pipe's production efficiency and quality.
Existing top, generally use H13 steel, ductile cast iron material are made, and its main failure forms is because hot strong
Property deficiency, and production requirement can not be met.The life-span come directly towards to the poling of the seamless steel pipe of GCr15 steel one kind high-strength materials asks
Inscribe it is especially prominent, the improvement to the alloying component of existing H13 steel need put into substantial contribution, there is substantial amounts of problem to need to solve.
Therefore, it is necessary to seek a kind of heat resistance for optimizing existing heading material, low cost improves the technology of service life.
The content of the invention
In view of the above-mentioned state of the art, the technical problems to be solved by the invention are to provide one kind.Reduce production
Cost, improve top calorific intensity and the piercing plug for seamless steel tubes Technology for Heating Processing of thermal fatigue property.
A kind of piercing plug for seamless steel tubes surface infiltration layer technique, it is characterised in that the handling process comprises the following steps：
A, make annealing treatment：Product is slowly heated with≤60 DEG C/h speed, 800-900 DEG C is heated to, is incubated, during insulation
Between be 2.5-3.5h, be cooled to less than 250 DEG C and come out of the stove, module hardness ＜ 235HB after annealing, be organized as pearlite+uniformly
The granular carbide of distribution；
B, Bononizing pretreatment：Product is placed into boronising in borax bath, bath temperature is maintained at 900-950 DEG C of constant temperature, the time≤3h,
Product is taken out, naturally cools to normal temperature；
C, Quenching Treatment：By product in hollow lower heating, heating-up temperature is 1030-1060 DEG C, is incubated 15-25min, then gone out
Stove air cooling, when austenitizing temperature reaches 1040 DEG C, carbide is relatively fully dissolved in austenite, makes the carbon in austenite and conjunction
The amount increase of gold element, the martensite for quenching to obtain substantially refine, and improving quenching temperature makes anti-softening ability after thermal cycle
Enhancing, this is due to that its margin of safety is big, while influence of high austenizing temp makes alloying element content increase in solid solution, and this is inherently
Tempering transition is delayed, hardness, which declines, to ease up, so as to improve thermal fatigue resistance.
D, temper：Product is incubated and is tempered, temperature is 330-370 DEG C, is incubated 2.5-3.2h, lonneal processing
Afterwards, martensitic structure is not completely converted into, most of is troostite, but organizes, than top original structure exquisiteness, to measure hardness
Substantially increase, be also beneficial to improve head lifetime.
Compared with prior art, the advantage of the invention is that：By changing parameter of the product in quenching and tempering technique,
It is in secondary troostite+martensite using matrix after 1060 DEG C of air cooling+lonneals, tissue becomes tiny, and boride layer is obtained into one
The diffusion of step, with the change alloying layer thickness increase of infiltration layer boron concentration, fragility improves, and measurement hardness substantially increases, and is advantageous to push up
Head increases the service life.
Embodiment
With reference to the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, shown
So, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on being in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all
Belong to the scope of protection of the invention.
Preferred embodiment
A kind of piercing plug for seamless steel tubes surface infiltration layer technique, it is characterised in that the handling process comprises the following steps：
A, make annealing treatment：Product is slowly heated with≤60 DEG C/h speed, 880 DEG C is heated to, is incubated, soaking time 3h,
It is cooled to less than 250 DEG C to come out of the stove, module hardness ＜ 235HB after annealing, is organized as pearlite+equally distributed granular carbonization
Thing；B, Bononizing pretreatment：Product is placed into boronising in borax bath, bath temperature is maintained at 930 DEG C of constant temperature, the time≤3h, will produced
Product take out, and naturally cool to normal temperature；C, Quenching Treatment：By product in hollow lower heating, heating-up temperature is 1040 DEG C, insulation
20min, then air cooling of coming out of the stove is carried out, when austenitizing temperature reaches 1040 DEG C, carbide is relatively fully dissolved in austenite, makes Austria
The amount increase of carbon and alloying element in family name's body, the martensite for quenching to obtain substantially refine, and improving quenching temperature follows heat
Anti-softening ability enhancing after ring, this is due to that its margin of safety is big, while influence of high austenizing temp contains alloying element in solid solution
Amount increase, this has inherently delayed tempering transition, and hardness, which declines, to ease up, so as to improve thermal fatigue resistance.D, temper：
Product is incubated and is tempered, temperature is 350 DEG C, is incubated 3h, after lonneal processing, is not completely converted into martensitic structure, greatly
Majority is troostite, but organizes substantially to increase than top original structure exquisiteness, measurement hardness, is also beneficial to improve head lifetime.
Compared with prior art, the advantage of the invention is that：By changing parameter of the product in quenching and tempering technique,
It is in secondary troostite+martensite using matrix after 1060 DEG C of air cooling+lonneals, tissue becomes tiny, and boride layer is obtained into one
The diffusion of step, with the change alloying layer thickness increase of infiltration layer boron concentration, fragility improves, and measurement hardness substantially increases, and is advantageous to push up
Head increases the service life.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that it still can be right
Technical scheme described in foregoing embodiments is modified, or which part technical characteristic is replaced on an equal basis；And this
A little modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the present invention technical scheme
Enclose.
Claims (1)
1. a kind of piercing plug for seamless steel tubes surface infiltration layer technique, it is characterised in that the handling process comprises the following steps：
A, make annealing treatment：Product is slowly heated with≤60 DEG C/h speed, 800-900 DEG C is heated to, is incubated, is incubated
Time is 2.5-3.5h, is cooled to less than 250 DEG C and comes out of the stove；
B, Bononizing pretreatment：Product is placed into boronising in borax bath, bath temperature is maintained at 900-950 DEG C of constant temperature, the time≤
3h, product is taken out, naturally cool to normal temperature；
C, Quenching Treatment：By product in hollow lower heating, heating-up temperature is 1030-1060 DEG C, is incubated 15-25min, then carry out
Come out of the stove air cooling；
D, temper：Product is incubated and is tempered, temperature is 330-370 DEG C, is incubated 2.5-3.2h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077533.XA CN107841708A (en) | 2017-11-06 | 2017-11-06 | A kind of piercing plug for seamless steel tubes surface infiltration layer technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711077533.XA CN107841708A (en) | 2017-11-06 | 2017-11-06 | A kind of piercing plug for seamless steel tubes surface infiltration layer technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107841708A true CN107841708A (en) | 2018-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711077533.XA Pending CN107841708A (en) | 2017-11-06 | 2017-11-06 | A kind of piercing plug for seamless steel tubes surface infiltration layer technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107841708A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777248A (en) * | 2019-11-25 | 2020-02-11 | 华迪钢业集团有限公司 | Heat treatment process of seamless steel pipe |
-
2017
- 2017-11-06 CN CN201711077533.XA patent/CN107841708A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110777248A (en) * | 2019-11-25 | 2020-02-11 | 华迪钢业集团有限公司 | Heat treatment process of seamless steel pipe |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180327 |