CN106086351B - A kind of method for reducing boracic heat-resistance stainless steel C type impurities - Google Patents
A kind of method for reducing boracic heat-resistance stainless steel C type impurities Download PDFInfo
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- CN106086351B CN106086351B CN201610453520.7A CN201610453520A CN106086351B CN 106086351 B CN106086351 B CN 106086351B CN 201610453520 A CN201610453520 A CN 201610453520A CN 106086351 B CN106086351 B CN 106086351B
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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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
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Abstract
The invention discloses a kind of method for reducing boracic heat-resistance stainless steel C type impurities, this method includes the following steps：First, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；Then, square billet is reheated into 1230 ~ 1260 DEG C of system, after heat preservation 16 ~ 25 hours, is furnace-cooled to 1050 DEG C, keeps the temperature 2 ~ 3 hours, finished product is forged after being then again heated to 1150 ~ 1180 DEG C of heat preservations 2 ~ 3 hours；Finally, the finished product bar of forging is placed in annealing furnace and is heated to 730 ~ 780 DEG C, after keeping the temperature 12 ~ 20 hours, be furnace-cooled to 500 DEG C, come out of the stove air-cooled；The method that this kind reduces boracic heat-resistance stainless steel C type impurities improves the performance of product, heat-treatment distortion can be reduced, the boride of the C type impurities in alloy can be disposed, improve the heat resistance of alloy in use, by boracic heat-resistance stainless steel metal lographic examination C type impurities produced by the invention qualification, product lumber recovery can be improved.
Description
Technical field
The present invention relates to a kind of method of stainless steel C type impurities, specially a kind of reduction boracic heat-resistance stainless steel C classes folder
The method of sundries belongs to alloy material applied technical field.
Background technology
With the development of science and technology, the needs of specific alloy yield and kind are growing, the requirement to quality
It is increasingly stringenter, harsh, in recent years, around specific alloy performance, quality, kind, efficiency is improved, reduce specific alloy cost,
It is energy-saving, environmental-friendly etc. to employ series of new techniques, new process, new equipment so that the cleanliness factor of specific alloy,
The uniformity, structure refinement degree and dimensional accuracy etc. have large increase, and with the development of turbine making technology, single-machine capacity is got over
Come bigger, steam turbine develops to super-critical and ultra super-critical power unit, vapor (steam) temperature and operating pressure respectively by original 520 DEG C,
15MPa be increased to 600 DEG C it is (higher to 650 DEG C）, 26~30MPa, this just proposes higher to the performance of material and clarity
Requirement, a kind of high-performance boracic ferritic heat-resistant steel can meet the demand, but in actual production, due to depositing for boron
And a kind of boride of similar C type impurities is easily being formed, causing in metallographic examination C type impurities exceeded or field trash
Summation is exceeded and generates waste product, reduces lumber recovery, and due to the irregularities of its formation, detection limit is caused to increase and reduces life
Produce efficiency.
Invention content
The purpose of the present invention is that solve the above-mentioned problems and provides a kind of reduction boracic heat-resistance stainless steel C classes and be mingled with
The method of object.
The present invention is achieved through the following technical solutions above-mentioned purpose, a kind of reduction boracic heat-resistance stainless steel C type impurities
Method, be as follows：
Step A, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；
Step B, the square billet of step A is again heated to 1230 ~ 1260 DEG C, after keeping the temperature 16 ~ 25 hours, is furnace-cooled to 1050 DEG C,
Heat preservation 2 ~ 3 hours, be then again heated to 1150 ~ 1180 DEG C heat preservation 2 ~ 3 hours after forge finished product；
Step C, the steel ingot forged in step B is subjected to blanking, carries out quenching treatment after blanking, temperature during quenching
It is 800-900 DEG C, air-cooled 2-3h is carried out after quenching, air-cooled good alloy is put to place into 500 DEG C -550 DEG C keep the temperature 3-5h, forges
Manufactured goods；
Step D, the finished product bar of step C forgings is placed in annealing furnace and is heated to 730 ~ 780 DEG C, keep the temperature 12 ~ 20 hours
Afterwards, 500 DEG C are furnace-cooled to, is come out of the stove air-cooled.
Preferably, the forging process in step A is as follows：Steel ingot is subjected to alloy phase change processing, the steel ingot of good heat insulation is moved back
800 DEG C are cooled fast to after fire, is then transferred in holding furnace and carries out phase transformation, then is warming up to certain temperature and carries out Forge Heating.
Preferably, during square billet reheats in step B, addition weight percentage is 2-3.5% electrolytic aluminiums, weight hundred
Point content is adequately stirred for 0.003-0.008% ferronickels.
The beneficial effects of the invention are as follows：The alloy that the method that this kind reduces boracic heat-resistance stainless steel C type impurities is smelted exists
Under high temperature there is good mechanical performance and chemical stability, wherein what is added in can improve the performance of product very well, can subtract
Few heat-treatment distortion can dispose the boride of the C type impurities in alloy, improve the heat resistance of alloy in use
Can, so as to improve the service life of the product of this kind of alloy manufacture, the boracic heat-resistance stainless steel metal lographic examination C type impurities of production close
Lattice can improve product lumber recovery, there is good economic benefit and social benefit, be suitble to promote the use of.
Specific embodiment
Below in conjunction in the embodiment of the present invention, the technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, the every other implementation that those of ordinary skill in the art are obtained without making creative work
Example, shall fall within the protection scope of the present invention.
Embodiment one：
A kind of method for reducing boracic heat-resistance stainless steel C type impurities, is as follows：
Step A, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；
Step B, the square billet of step A is again heated to 1230 ~ 1260 DEG C, after keeping the temperature 16 ~ 25 hours, is furnace-cooled to 1050 DEG C,
Heat preservation 2 ~ 3 hours, be then again heated to 1150 ~ 1180 DEG C heat preservation 2 ~ 3 hours after forge finished product；
Step C, the steel ingot forged in step B is subjected to blanking, carries out quenching treatment after blanking, temperature during quenching
It is 800-900 DEG C, air-cooled 2-3h is carried out after quenching, air-cooled good alloy is put to place into 500 DEG C -550 DEG C keep the temperature 3-5h, forges
Manufactured goods；
Step D, the finished product bar of step C forgings is placed in annealing furnace and is heated to 730 ~ 780 DEG C, keep the temperature 12 ~ 20 hours
Afterwards, 500 DEG C are furnace-cooled to, is come out of the stove air-cooled.
Forging process in step A is as follows：Steel ingot is subjected to alloy phase change processing, it will be quick after the ingot annealing of good heat insulation
800 DEG C are cooled to, is then transferred in holding furnace and carries out phase transformation, then is warming up to certain temperature and carries out Forge Heating；Square billet in step B
During reheating, addition weight percentage is 3.5% electrolytic aluminium, weight percentage is that 0.008% ferronickel carries out adequately
Stirring.
Embodiment two：
A kind of method for reducing boracic heat-resistance stainless steel C type impurities, is as follows：
Step A, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；
Step B, the square billet of step A is again heated to 1230 ~ 1260 DEG C, after keeping the temperature 16 ~ 25 hours, is furnace-cooled to 1050 DEG C,
Heat preservation 2 ~ 3 hours, be then again heated to 1150 ~ 1180 DEG C heat preservation 2 ~ 3 hours after forge finished product；
Step C, the steel ingot forged in step B is subjected to blanking, carries out quenching treatment after blanking, temperature during quenching
It is 800-900 DEG C, air-cooled 2-3h is carried out after quenching, air-cooled good alloy is put to place into 500 DEG C -550 DEG C keep the temperature 3-5h, forges
Manufactured goods；
Step D, the finished product bar of step C forgings is placed in annealing furnace and is heated to 730 ~ 780 DEG C, keep the temperature 12 ~ 20 hours
Afterwards, 500 DEG C are furnace-cooled to, is come out of the stove air-cooled.
Forging process in step A is as follows：Steel ingot is subjected to alloy phase change processing, it will be quick after the ingot annealing of good heat insulation
800 DEG C are cooled to, is then transferred in holding furnace and carries out phase transformation, then is warming up to certain temperature and carries out Forge Heating；Square billet in step B
During reheating, addition weight percentage is 2% electrolytic aluminium, weight percentage is that 0.003% ferronickel is adequately stirred
It mixes.
Embodiment three：
A kind of method for reducing boracic heat-resistance stainless steel C type impurities, is as follows：
Step A, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；
Step B, the square billet of step A is again heated to 1230 ~ 1260 DEG C, after keeping the temperature 16 ~ 25 hours, is furnace-cooled to 1050 DEG C,
Heat preservation 2 ~ 3 hours, be then again heated to 1150 ~ 1180 DEG C heat preservation 2 ~ 3 hours after forge finished product；
Step C, the steel ingot forged in step B is subjected to blanking, carries out quenching treatment after blanking, temperature during quenching
It is 800-900 DEG C, air-cooled 2-3h is carried out after quenching, air-cooled good alloy is put to place into 500 DEG C -550 DEG C keep the temperature 3-5h, forges
Manufactured goods；
Step D, the finished product bar of step C forgings is placed in annealing furnace and is heated to 730 ~ 780 DEG C, keep the temperature 12 ~ 20 hours
Afterwards, 500 DEG C are furnace-cooled to, is come out of the stove air-cooled.
Forging process in step A is as follows：Steel ingot is subjected to alloy phase change processing, it will be quick after the ingot annealing of good heat insulation
800 DEG C are cooled to, is then transferred in holding furnace and carries out phase transformation, then is warming up to certain temperature and carries out Forge Heating；Square billet in step B
During reheating, addition weight percentage is 3% electrolytic aluminium, weight percentage is that 0.005% ferronickel is adequately stirred
It mixes.
According to the alloy that embodiment one, two, three makes by detection, detection C type impurities are zero, manufacture this method
Alloy have good mechanical performance and chemical stability, reduce boracic heat-resistance stainless steel C type impurities method smelt
Alloy has good mechanical performance and chemical stability at high temperature, wherein what is added in can improve the performance of product very well,
Heat-treatment distortion can be reduced, can dispose the boride of the C type impurities in alloy, improves alloy in use
Heat resistance, so as to improve the service life of the product of this kind of alloy manufacture, the boracic heat-resistance stainless steel metal lographic examination C classes of production are mingled with
Object is qualified, can improve product lumber recovery, so as to improve the service life of the product of this kind of alloy manufacture.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any label in claim should not be considered as to the involved claim of limitation.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in each embodiment can also be properly combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (2)
- A kind of 1. method for reducing boracic heat-resistance stainless steel C type impurities, it is characterised in that：It is as follows：Step A, by Heating Steel Ingots to 1150 ~ 1180 DEG C, after keeping the temperature 2 ~ 5 hours, square billet is made in forging of coming out of the stove；Step B, the square billet of step A is again heated to 1230 ~ 1260 DEG C, after keeping the temperature 16 ~ 25 hours, is furnace-cooled to 1050 DEG C, heat preservation 2 ~ 3 hours, be then again heated to 1150 ~ 1180 DEG C heat preservation 2 ~ 3 hours after be forged into steel ingot；Step C, the steel ingot forged in step B is subjected to blanking, carries out quenching treatment after blanking, temperature during quenching is 800-900 DEG C, air-cooled 2-3h is carried out after quenching, air-cooled good alloy is placed into 500 DEG C -550 DEG C and keeps the temperature 3-5h, is forged into Product；Step D, the finished product bar of step C forgings is placed in annealing furnace and is heated to 730 ~ 780 DEG C, after keeping the temperature 12 ~ 20 hours, stove It is cooled to 500 DEG C, comes out of the stove air-cooled.
- 2. a kind of method for reducing boracic heat-resistance stainless steel C type impurities according to claim 1, it is characterised in that：Step Forging process in rapid A is as follows：Steel ingot is subjected to alloy phase change processing, 800 will be cooled fast to after the ingot annealing of good heat insulation DEG C, it is then transferred in holding furnace and carries out phase transformation, then be warming up to certain temperature and carry out Forge Heating.
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| CN102527892B (en) * | 2011-12-31 | 2013-09-18 | 上海加宁新技术研究所 | Manufacturing method of martensitic stainless steel forged piece with high electric resistivity and high magnetic conductivity |
| CN102586550B (en) * | 2012-02-29 | 2014-04-02 | 重庆宗学重工机械股份有限公司 | Heat treatment method for stainless steel heat-resistant steel forging |
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Address after: 621700 West Section of Baolun Road, Henan Industrial Park, Jiangyou City, Mianyang City, Sichuan Province Patentee after: Sichuan Liuhe Special Metal Materials Co., Ltd. Address before: 621700 West Section of Baolun Road, Henan Industrial Park, Jiangyou City, Mianyang City, Sichuan Province Patentee before: Sichuan Liuhe Forging Company Ltd. |
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