CN102191439A - Stainless steel material used for blades and bolts of nuclear power steam turbine and preparation method thereof - Google Patents
Stainless steel material used for blades and bolts of nuclear power steam turbine and preparation method thereof Download PDFInfo
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- CN102191439A CN102191439A CN2011101060773A CN201110106077A CN102191439A CN 102191439 A CN102191439 A CN 102191439A CN 2011101060773 A CN2011101060773 A CN 2011101060773A CN 201110106077 A CN201110106077 A CN 201110106077A CN 102191439 A CN102191439 A CN 102191439A
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Abstract
The invention relates to a stainless steel material used for the blades and bolts of the nuclear power steam turbine and a preparation method thereof. The invention has the following technical scheme: the stainless steel material comprises the following elements by weight percent: 0.10-0.14% of C, 0.40-0.90% of Mn, 2.00-3.00% of Ni, 11.0-12.5% of Cr, 1.00-2.00% of Mo, 0.25-0.40% of V, 0.05-0.4% of Nb and 0.02-0.06% of N. The preparation method comprises the following steps: using the elements according to the set ratio to perform primary smelting in a non-vacuum induction furnace at 1510-1610 DEG C; adjusting the content of each element in the smelting process to control the content of impurity elements to be as low as possible, pouring the solution to obtain a consumable electrode; placing the consumable electrode in an electroslag furnace to remelt and refine, and further reducing the content of impurity elements to prepare an electroslag ingot. The stainless steel material can effectively meet the operating requirements of the nuclear power steam turbine unit.
Description
Technical field
The present invention relates to a kind of stainless material that is used for nuclear steam turbine blade and bolt and preparation method thereof.
Technical background
Along with the increase of domestic power consumption and the development of environmental requirement and China's nuclear power usefulness steam turbine manufacturing technology, the nuclear steam turbine group is used for generating in a large number, its working temperature and pressure and Working environment and nuclear power safe requirement and common Steam Turbine have very big difference, and the mechanical property of existing turbine blade and bolt material can not satisfy the service requirements of this operating mode.
Summary of the invention
The purpose of this invention is to provide a kind of stainless material that can effectively satisfy the service requirements of nuclear steam turbine group and preparation method thereof.
To achieve the object of the present invention, the technical solution used in the present invention is: be used for the stainless material of nuclear steam turbine blade and bolt, comprise each component of following weight percent:
C：0.10-0.14%；?Mn:?0.40-0.90%；Ni：2.00-3.00%；Cr：11.0-12.5%；
Mo：1.00-2.00%；V：0.25-0.40%；Nb：0.05-0.4%；N：0.02-0.06%?；
Surplus is Fe and impurity.
The above-mentioned preparation method who is used for the stainless material of nuclear steam turbine blade and bolt comprises the following steps:
A, get the refining just in non-vacuum induction furnace of required element, smelting temperature 1510-1610 ℃ to scale; Regulate the content of each element in fusion process, make its weight ratio ratio up to specification, the content of control impurity element is low as far as possible, and solution casting becomes consumable electrode;
B, above-mentioned consumable electrode is placed the electroslag furnace remelting refining, further reduce the content of impurity element, it is adhered to specification, make ESR ingot.
In such scheme, after the described step b, also comprise the following steps:
C, with the described ESR ingot heats forged of step b or be rolled into rod iron;
D. the thermal treatment of annealing after rod iron is forged, step and processing parameter are as follows:
After the rod iron slow cooling, in annealing furnace, be heated to 630 ℃-750 ℃, and come out of the stove air cooling after being incubated 10～20 hours;
E. then the finished product rod iron is carried out surperficial car optical processing, eliminate surface imperfection and rod iron size, shape, surface quality are met design requirement;
F. finished product rod iron mechanical property is tested, on the finished product rod iron, take a sample, carry out tensile test at room temperature.
In such scheme, in step f, heat-treat sample the sampling back, and its treatment step is:
Quench: Heating temperature is 1030 ℃-1070 ℃, and the time is 1 hour, and the type of cooling is an oil cooling;
Tempering for the first time: Heating temperature is 650 ℃-700 ℃, time 〉=3 hour, and the type of cooling is an air cooling;
Tempering for the second time: Heating temperature is 600 ℃-640 ℃, time 〉=2 hour, and the type of cooling is an air cooling.
Can draw from every technical characterictic of foregoing invention, advantage of the present invention is: behind each set of dispense ratio of the present invention and preparation method, by tensile test at room temperature, its finished product technical indicator detected result is:
Vertically:
Tensile strength------σ
b930-1100MPa;
Yield strength-------------σ
0. 2〉=780 MPa;
Elongation-----------------δ 5 〉=14%;
Relative reduction in area---------------ψ 〉=32%;
Ballistic work----------------------A
KV 〉=50J;
Hardness--------------------HB 285-331;
Laterally:
Tensile strength----------------σ
b930-1100MPa;
Yield strength------------σ
0. 2〉=780 MPa;
Elongation---------------------δ
5〉=15%;
Relative reduction in area----------------------ψ 〉=50%;
Ballistic work--------------------A
KV 〉=50J;
Hardness------------------------HB 285-331,
Above-mentioned technical indicator can satisfy the service requirements of nuclear steam turbine group fully.
Embodiment
The present invention will be further described below in conjunction with specific embodiment:
Embodiment 1
In the present embodiment, we adopt each component of following weight percent: C:0.117%; Mn:0.74%; Ni:2.79%; Cr:11.43%; Mo:1.55%; V:0.29%; Nb:0.21%; N:0.044%, surplus is Fe and impurity.
With the refining just in non-vacuum induction furnace to scale of above-mentioned element, smelting temperature 1510-1610 ℃; Regulate the content of each element in fusion process, make its weight ratio ratio up to specification, the content of control impurity element is low as far as possible, and solution casting becomes consumable electrode;
Above-mentioned consumable electrode is placed the electroslag furnace remelting refining, further reduce the content of impurity element, it is adhered to specification, make ESR ingot.
We can be made into rod iron with above-mentioned ESR ingot, carry out tensile test at room temperature then, with the performance of testing product, realize through the following steps:
With above-mentioned ESR ingot heats forged or be rolled into rod iron;
The thermal treatment of annealing after rod iron is forged, step and processing parameter are as follows:
After the rod iron slow cooling, in annealing furnace, be heated to 630 ℃-750 ℃, and come out of the stove air cooling after being incubated 10～20 hours;
Then the finished product rod iron is carried out surperficial car optical processing, eliminate surface imperfection and rod iron size, shape, surface quality are met design requirement;
Finished product rod iron mechanical property is tested, on the finished product rod iron, take a sample, carry out tensile test at room temperature.
By above-mentioned steps, we take a sample on rod iron and heat-treat, and carry out Performance Detection then, and heat treatment step is:
Quench: Heating temperature is 1030 ℃-1070 ℃, and the time is 1 hour, and the type of cooling is an oil cooling;
Tempering for the first time: Heating temperature is 650 ℃-700 ℃, time 〉=3 hour, and the type of cooling is an air cooling;
Tempering for the second time: Heating temperature is 600 ℃-640 ℃, time 〉=2 hour, and the type of cooling is an air cooling.
After above-mentioned steps, we carry out tensile test at room temperature to sample, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b980MPa;
Yield strength-------------σ
0. 2〉=820 MPa;
Elongation-----------------δ 5 〉=20%;
Relative reduction in area---------------ψ 〉=56%;
Ballistic work----------------------A
KV 〉=93J;
Hardness--------------------HB311;
Laterally:
Tensile strength----------------σ
b975MPa;
Yield strength------------σ
0. 2〉=840 MPa;
Elongation---------------------δ
5〉=17%;
Relative reduction in area----------------------ψ 〉=55%;
Ballistic work--------------------A
KV 〉=53J;
Hardness------------------------HB 312.
Embodiment 2
In the present embodiment, we adopt each component of following weight percent: C:0.114%; Mn:0.75%; Ni:2.85%; Cr:11.58%; Mo:1.55%; V:0.29%; Nb:0.21%; N:0.045%, surplus is Fe and impurity.
All the other operation stepss are carried out tensile test at room temperature to sample at last with embodiment 1, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b985MPa;
Yield strength-------------σ
0. 2〉=845 MPa;
Elongation-----------------δ 5 〉=19%;
Relative reduction in area---------------ψ 〉=62%;
Ballistic work----------------------A
KV 〉=87J;
Hardness--------------------HB315;
Laterally:
Tensile strength----------------σ
b980MPa;
Yield strength------------σ
0. 2〉=835 MPa;
Elongation---------------------δ
5〉=18%;
Relative reduction in area----------------------ψ 〉=57%;
Ballistic work--------------------A
KV 〉=67J;
Hardness------------------------HB 307.
Embodiment 3
In the present embodiment, we adopt each component of following weight percent: C:0.115%; Mn:0.74%; Ni:2.86%; Cr:11.52%; Mo:1.54%; V:0.305%; Nb:0.20%; N:0.046%, surplus is Fe and impurity.
All the other operation stepss are carried out tensile test at room temperature to sample at last with embodiment 1, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b980MPa;
Yield strength-------------σ
0. 2〉=840 MPa;
Elongation-----------------δ 5 〉=19%;
Relative reduction in area---------------ψ 〉=60%;
Ballistic work----------------------A
KV 〉=99J;
Hardness--------------------HB315;
Laterally:
Tensile strength----------------σ
b990MPa;
Yield strength------------σ
0. 2〉=840 MPa;
Elongation---------------------δ
5〉=16%;
Relative reduction in area----------------------ψ 〉=57.5%;
Ballistic work--------------------A
KV 〉=71J;
Hardness------------------------HB 308.
Embodiment 4
In the present embodiment, we adopt each component of following weight percent: C:0.12%; Mn:0.78%; Ni:2.84%; Cr:11.54%; Mo:1.51%; V:0.305%; Nb:0.215%; N:0.044%, surplus is Fe and impurity.
All the other operation stepss are carried out tensile test at room temperature to sample at last with embodiment 1, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b985MPa;
Yield strength-------------σ
0. 2〉=835 MPa;
Elongation-----------------δ 5 〉=18%;
Relative reduction in area---------------ψ 〉=58%;
Ballistic work----------------------A
KV 〉=91J;
Hardness--------------------HB309;
Laterally:
Tensile strength----------------σ
b970MPa;
Yield strength------------σ
0. 2〉=845 MPa;
Elongation---------------------δ
5〉=17%;
Relative reduction in area----------------------ψ 〉=59%;
Ballistic work--------------------A
KV 〉=58J;
Hardness------------------------HB 303.
Embodiment 5
In the present embodiment, we adopt each component of following weight percent: C:0.10%; Mn:0.40%; Ni:2.0%; Cr:11.0%; Mo:1.0%; V:0.25%; Nb:0.05%; N:0.02%, surplus is Fe and impurity.
All the other operation stepss are carried out tensile test at room temperature to sample at last with embodiment 1, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b935MPa;
Yield strength-------------σ
0. 2〉=790 MPa;
Elongation-----------------δ 5 〉=15%;
Relative reduction in area---------------ψ 〉=38%;
Ballistic work----------------------A
KV 〉=65J;
Hardness--------------------HB298;
Laterally:
Tensile strength----------------σ
b936MPa;
Yield strength------------σ
0. 2〉=788 MPa;
Elongation---------------------δ
5〉=16%;
Relative reduction in area----------------------ψ 〉=52%;
Ballistic work--------------------A
KV 〉=54J;
Hardness------------------------HB 292.
Embodiment 6
In the present embodiment, we adopt each component of following weight percent: C:0.14%; Mn:0.90%; Ni:32.0%; Cr:12.5%; Mo:2.0%; V:0.40%; Nb:0.40%; N:0.06%, surplus is Fe and impurity.
All the other operation stepss are carried out tensile test at room temperature to sample at last with embodiment 1, and detection obtains its every technical indicator and is:
Vertically:
Tensile strength------σ
b1085MPa;
Yield strength-------------σ
0. 2〉=956 MPa;
Elongation-----------------δ 5 〉=22%;
Relative reduction in area---------------ψ 〉=78%;
Ballistic work----------------------A
KV 〉=85J;
Hardness--------------------HB330;
Laterally:
Tensile strength----------------σ
b1077MPa;
Yield strength------------σ
0. 2〉=988 MPa;
Elongation---------------------δ
5〉=29%;
Relative reduction in area----------------------ψ 〉=81%;
Ballistic work--------------------A
KV 〉=82J;
Hardness------------------------HB 328.
Disclosed all features in this specification sheets except mutually exclusive feature, all can make up by any way.
Disclosed arbitrary feature in this specification sheets (comprising any accessory claim, summary) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.Unless promptly special narration, each feature is an example in a series of equivalences or the similar characteristics.
Claims (4)
1. the stainless material that is used for nuclear steam turbine blade and bolt is characterized in that comprising each component of following weight percent:
C：0.10-0.14%；?Mn:?0.40-0.90%；?Ni：2.00-3.00%；
Cr：11.0-12.5%；Mo：1.00-2.00%；V：0.25-0.40%；
Nb:0.05-0.4%; N:0.02-0.06 %; Surplus is Fe and impurity.
2. the preparation method who is used for the stainless material of nuclear steam turbine blade and bolt according to claim 1 is characterized in that comprising the following steps:
A, get the refining just in non-vacuum induction furnace of required element, smelting temperature 1510-1610 ℃ to scale; Regulate the content of each element in fusion process, make its weight ratio ratio up to specification, the content of control impurity element is low as far as possible, and solution casting becomes consumable electrode;
B, above-mentioned consumable electrode is placed the electroslag furnace remelting refining, further reduce the content of impurity element, it is adhered to specification, make ESR ingot.
3. preparation method according to claim 2 is characterized in that also comprising the following steps: after described step b
C, with the described ESR ingot heats forged of step b or be rolled into rod iron;
D. the thermal treatment of annealing after rod iron is forged, step and processing parameter are as follows:
After the rod iron slow cooling, in annealing furnace, be heated to 630 ℃-750 ℃, and come out of the stove air cooling after being incubated 10～20 hours;
E. then the finished product rod iron is carried out surperficial car optical processing, eliminate surface imperfection and rod iron size, shape, surface quality are met design requirement;
F. finished product rod iron mechanical property is tested, on the finished product rod iron, take a sample, carry out tensile test at room temperature.
4. preparation method according to claim 3 is characterized in that in step f, and heat-treat sample the sampling back, and its treatment step is:
Quench: Heating temperature is 1030 ℃-1070 ℃, and the time is 1 hour, and the type of cooling is an oil cooling;
Tempering for the first time: Heating temperature is 650 ℃-700 ℃, time 〉=3 hour, and the type of cooling is an air cooling;
Tempering for the second time: Heating temperature is 600 ℃-640 ℃, time 〉=2 hour, and the type of cooling is an air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101060773A CN102191439A (en) | 2011-04-27 | 2011-04-27 | Stainless steel material used for blades and bolts of nuclear power steam turbine and preparation method thereof |
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|---|---|---|---|
| CN2011101060773A CN102191439A (en) | 2011-04-27 | 2011-04-27 | Stainless steel material used for blades and bolts of nuclear power steam turbine and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505099A (en) * | 2011-12-14 | 2012-06-20 | 哈尔滨汽轮机厂有限责任公司 | Alloy steel material for low pressure last stage blade of steam turbine |
| CN103725978A (en) * | 2013-10-26 | 2014-04-16 | 溧阳市浙大产学研服务中心有限公司 | Improved method for preparing magnetic-control connector for pressurized water reactor nuclear island |
| CN103725981A (en) * | 2013-10-26 | 2014-04-16 | 溧阳市浙大产学研服务中心有限公司 | Preparation method of high-performance magnetic control connecting piece |
| CN104033189A (en) * | 2014-06-27 | 2014-09-10 | 南京赛达机械制造有限公司 | Blade of steam turbine and process for machining blade |
| CN104818432A (en) * | 2015-05-29 | 2015-08-05 | 四川六合锻造股份有限公司 | Alloy material for turboset rotor and preparation method thereof |
| CN105937014A (en) * | 2016-05-21 | 2016-09-14 | 四川六合锻造股份有限公司 | Blade steel material of compressor of gas turbine and preparation method thereof |
| CN109972047A (en) * | 2019-05-10 | 2019-07-05 | 江苏旭天智能装备有限公司 | Meter Han Na casting double tempering heat treatment technique |
| CN112048604A (en) * | 2020-07-30 | 2020-12-08 | 四川六合特种金属材料股份有限公司 | Preparation process of low-alloy high-temperature bolt |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102505099A (en) * | 2011-12-14 | 2012-06-20 | 哈尔滨汽轮机厂有限责任公司 | Alloy steel material for low pressure last stage blade of steam turbine |
| CN103725978A (en) * | 2013-10-26 | 2014-04-16 | 溧阳市浙大产学研服务中心有限公司 | Improved method for preparing magnetic-control connector for pressurized water reactor nuclear island |
| CN103725981A (en) * | 2013-10-26 | 2014-04-16 | 溧阳市浙大产学研服务中心有限公司 | Preparation method of high-performance magnetic control connecting piece |
| CN104033189A (en) * | 2014-06-27 | 2014-09-10 | 南京赛达机械制造有限公司 | Blade of steam turbine and process for machining blade |
| CN104033189B (en) * | 2014-06-27 | 2016-01-27 | 南京赛达机械制造有限公司 | A kind of processing technology of turbine blade |
| CN104818432A (en) * | 2015-05-29 | 2015-08-05 | 四川六合锻造股份有限公司 | Alloy material for turboset rotor and preparation method thereof |
| CN105937014A (en) * | 2016-05-21 | 2016-09-14 | 四川六合锻造股份有限公司 | Blade steel material of compressor of gas turbine and preparation method thereof |
| CN109972047A (en) * | 2019-05-10 | 2019-07-05 | 江苏旭天智能装备有限公司 | Meter Han Na casting double tempering heat treatment technique |
| CN112048604A (en) * | 2020-07-30 | 2020-12-08 | 四川六合特种金属材料股份有限公司 | Preparation process of low-alloy high-temperature bolt |
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