CN103993244A - Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof - Google Patents
Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof Download PDFInfo
- Publication number
- CN103993244A CN103993244A CN201410231686.5A CN201410231686A CN103993244A CN 103993244 A CN103993244 A CN 103993244A CN 201410231686 A CN201410231686 A CN 201410231686A CN 103993244 A CN103993244 A CN 103993244A
- Authority
- CN
- China
- Prior art keywords
- cast steel
- tempering
- steel node
- normalizing
- quenching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Heat Treatment Of Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a low-alloy cast steel joint as well as a smelting and pouring control method and a heat treatment process thereof. According to the characteristics that whether the structure of a cast steel joint is simple, whether the wall thickness is uniform, and whether cracks are easy to be generated in the heat treatment process, carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr) and nickel (Ni) in components of the cast steel joint are relatively regulated, and the cast steel joint is subjected to relative 'quenching and tempering' or 'normalizing and tempering' treatment in the heat treatment process link. By using the method of adding low-alloy, the casting cost can be reduced on the premise of meeting the mechanical properties and welding properties of the cast steel joint.
Description
Technical field
The present invention relates to construction steel structure field, be specifically related to a kind of low-alloy cast steel node and melting thereof, cast control method and thermal treatment process.
Background technology
Being connected between the steelframe and steelframe of construction steel structure, between steelframe and pillar adopts cast steel node and steelframe (or pillar) phase welded structure more.Because the design concept of construction steel structure is strong node, weak rod member, for guaranteeing that its steel construction is not intersected the restriction of (or passing through mutually) joint behavior or cost, architectural design is relatively more prudent along with cast steel node is in the deeply application widely in construction steel structure field to selecting of high-strength cast steel node, and the mechanical property of cast steel node has been had to higher requirement.
It is that in GB/T7659, the highest trade mark is ZG340-550H that current cast steel node adopts national standard, its corresponding performance is yield strength >=340Mpa, tensile strength >=550Mpa, elongation >=15%, and the cast steel node of this trade mark can not meet steel structure material Q390B (wall thickness is greater than 16mm): tensile strength >=490Mpa, yield strength >=370Mpa, elongation >=20%; Can not meet steel structure material Q420B (wall thickness is greater than 50mm): the requirement of tensile strength >=520Mpa, yield strength >=380Mpa, elongation >=19%; In practical engineering application, designing unit often adopts increases the wall thickness of cast steel node or strengthens cast steel node dimensions so that the intensity that cast steel node meets design requirement, this will make the steel using amount of cast steel node increase considerably, and monolithic architecture cost also increases thereupon.
In Japanese JIS standard, there is the cast steel node material matching with Q390B (wall thickness is greater than 16mm) and Q420B (wall thickness is greater than 50mm) standard that other countries also not do not match with the good cast steel node material of construction steel structure low-alloy high-strength, welding property at present.Described in Japan JIS standard, the chemical composition of material is specially: C≤0.22%, Si≤0.80%, Mn≤1.50%, P≤0.04%, S≤0.04%, Cr≤0.50%, Ni≤2.50%, Mo≤0.30%, V≤0.20%.Can find out, the chemical composition interalloy element that this material is corresponding adds many, and the precious metal elements such as chromium (Cr), nickel (Ni), molybdenum (Mo) and the vanadium (V) of high level are added, material cost is too high, for making casting industry can meet as early as possible the market development demand of construction steel structure, casting cost is urgently optimized with respect to the ratio of the comprehensive cost of monolithic architecture.
Summary of the invention
In view of this, the invention provides low-alloy cast steel node and melting thereof, cast control method and thermal treatment process, by adding low-alloyed method to reach the mechanical property of building requirements, meet at cast steel node under the prerequisite of high-strength mechanical properties and welding property, greatly reduce casting cost.
The technical solution used in the present invention is specially: a kind of low-alloy cast steel node, raw material melting by following mass percent is made: carbon (C) is 0.17～0.25%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).
A kind of low-alloy cast steel node, raw material melting by following mass percent is made: carbon (C) is 0.18～0.25%, silicon (Si)≤0.60%, manganese (Mn) are 1.00～1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).
A kind of low-alloy cast steel node, raw material melting by following mass percent is made: carbon (C) is 0.17～0.23%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.02%, sulphur (S)≤0.02%, also comprise chromium (Cr)≤0.30%, nickel (Ni)≤1.00%, surplus is iron (Fe).
The melting of low-alloy cast steel node and a cast control method, wherein melting operation adopts arc melting, and cast operation adopts bottom filling steel ladle pouring, mainly comprises the following steps:
S1: by through rust cleaning and clean steel scrap with comprise that the alloying element of ferromanganese, ferrochrome and ferrosilicon adds melting in electric arc furnace;
S2: the reduction period of melting adds the alloying element that comprises ferromanganese, ferrochrome and ferrosilicon;
S2: the molten steel of melting is come out of the stove in the time that temperature is 1600～1650 DEG C;
S3: adopt bottom filling ladle to pour into a mould the molten steel of coming out of the stove, the temperature of cast is 1500～1580 DEG C.
For simple in structure, wall thickness is even, is difficult for the thermal treatment process of the cast steel node cracking in heat treatment process, comprises quenching processing technology and temper technique, described quenching processing technology and high tempering treatment process are specially:
Described quenching processing technology process comprises quench temperature rise period and quenching and preserving heat stage, wherein:
Quench the temperature rise period: 600 DEG C of following its heat-up rates of quenching temperature rise period are controlled at per hour below 100 DEG C, be incubated 4h after being warming up to 600 DEG C; 600 DEG C of its heat-up rates of quenching temperature rise period to (880 ± 10) DEG C are controlled at per hour below 100 DEG C;
The quenching and preserving heat stage: in the time that temperature is 880 ± 10 DEG C, soaking time is calculated according to the wall thickness of cast steel node or feed height;
When described cast steel node reaches after the soaking time of described holding stage needs, after quenching, the cast steel node through above-mentioned quenching processing technology is carried out to high tempering processing, described high tempering treatment process comprises tempering temperature rise period and tempering holding stage, wherein:
The tempering temperature rise period: heat-up rate is controlled at per hour below 100 DEG C, be warming up to 600～650 DEG C;
Tempering holding stage: insulation in the time that temperature is 600～650 DEG C, tempering insulation time calculates according to the wall thickness of described cast steel node or feed height;
The air cooling of coming out of the stove after described cast steel node reaches the soaking time of described tempering holding stage requirement.
For the thermal treatment process of complex structure, inhomogeneity of wall thickness is even or heat treatment process easily cracks cast steel node, comprise normalizing treatment technique and temper technique, described normalizing treatment technique and temper technique are specially:
Described normalizing treatment technique comprises normalizing temperature rise period and normalizing holding stage, wherein:
The normalizing temperature rise period: 600 DEG C of following normalizing heat-up rates are controlled at per hour below 100 DEG C, be incubated 4h after being heated to 600 DEG C; The normalizing heat-up rate of 600～(900 ± 10) DEG C is controlled at per hour below 100 DEG C;
Normalizing holding stage: in the time that temperature is 900 ± 10 DEG C, tempering insulation time calculates according to the wall thickness of described cast steel node or feed height;
Described cast steel node reaches after the soaking time of described normalizing holding stage requirement, come out of the stove and carry out after forced air-cooling adds water smoke the described cast steel node through above-mentioned normalizing treatment technique to carry out temper, temper technique comprises tempering temperature rise period and tempering holding stage, wherein:
The tempering temperature rise period: heat-up rate is controlled at per hour below 100 DEG C, be warming up to 600～650 DEG C;
Tempering holding stage, insulation in the time that temperature is 600～650 DEG C, tempering insulation time calculates according to the wall thickness of above-mentioned cast steel node or feed height;
The air cooling of coming out of the stove after described cast steel node reaches the soaking time of described tempering holding stage requirement.
Described Quenching Soaking Time and described tempering insulation time calculate according to the wall thickness of cast steel node, are incubated according to 25mm/h.
Described Quenching Soaking Time and described tempering insulation time calculate according to feed height, are incubated according to 4h/m.
The beneficial effect that the present invention produces is:
Cast steel node is ensureing to have under the prerequisite of good welds performance (carbon equivalent < 0.48%), the premium properties that to have realized yield strength > 380Mpa, tensile strength > 550Mpa, elongation be 20%, and in the component of cast steel node, save the precious metal element including molybdenum (Mo) and vanadium (V), reduce the content of chromium (Cr), nickel (Ni), under the prerequisite of proof strength, greatly reduced the ratio of casting cost in comprehensive cost.In addition, cast steel node of the present invention can be realized quick installation and the fine adjustment of construction steel structure, simple installation, and rolled steel dosage is little.
Brief description of the drawings
When considered in conjunction with the accompanying drawings, can more completely understand better the present invention.Accompanying drawing described herein is used to provide a further understanding of the present invention, and embodiment and explanation thereof are used for explaining the present invention, does not form inappropriate limitation of the present invention.
Simple in structure, the wall thickness that Fig. 1-1 is a kind of low-alloy cast steel node of the present invention evenly and in heat treatment process, be difficult for cracking corresponding master and look schematic diagram;
Fig. 1-2 be a kind of low-alloy cast steel node of the present invention simple in structure, wall thickness evenly and in heat treatment process, be difficult for cracking corresponding left pseudosection;
Simple in structure, wall thickness that Fig. 1-3 are a kind of low-alloy cast steel node of the present invention evenly and in heat treatment process are difficult for cracking corresponding schematic top plan view;
Fig. 2 is that Fig. 1-1 to the cast steel node of embodiment corresponding to 1-3 is arranged schematic diagram;
Fig. 3-1 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack corresponding master and look schematic diagram;
Fig. 3-2 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack a corresponding left side and look schematic diagram;
Fig. 3-3 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack corresponding schematic top plan view;
Fig. 3-4 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack 1,2 corresponding bar section schematic diagram;
Fig. 3-5 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack 3,4 corresponding bar section schematic diagram;
Fig. 3-6 for complex structure, the inhomogeneity of wall thickness of a kind of low-alloy cast steel node of the present invention is even or heat treatment process in easily crack 5,6 corresponding bar section schematic diagram;
Fig. 4 is that Fig. 3-1 to the cast steel node of embodiment corresponding to 3-6 is arranged schematic diagram.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
Embodiment
A kind of low-alloy cast steel node, raw material melting by following mass percent is made: carbon (C) is 0.17～0.25%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).
When cast steel node is that simple in structure, wall thickness is evenly and in the situation that is difficult for cracking in heat treatment process, preferably made by the raw material melting of following mass percent: carbon (C) is 0.18～0.25%, silicon (Si)≤0.60%, manganese (Mn) are 1.00～1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).Its corresponding thermal treatment process after melting, cast comprises quenching processing technology and temper technique
When cast steel node is in situation about easily cracking in the even or heat treatment process of complex structure, inhomogeneity of wall thickness, preferably made by the raw material melting of following mass percent: carbon (C) is 0.17～0.23%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.02%, sulphur (S)≤0.02%, chromium (Cr)≤0.30%, nickel (Ni)≤1.00%, surplus is iron (Fe).Its corresponding thermal treatment process after melting, cast comprises normalizing treatment technique and temper technique.
Application case below by two Practical Projects is further described technical scheme of the present invention.
Embodiment 1
The low-alloy high-strength cast steel node that construction steel structure is used is a concrete application for certain subway station engineering abroad, and material mechanical performance requires tensile strength >=540Mpa, yield strength >=350Mpa, elongation >=16%; The structure of cast steel node is if Fig. 1-1 is to as shown in 1-3, the layout of cast steel node (part) as shown in Figure 2, and 3727 of cast steel node quantity.Obviously, cast steel node be simple in structure, wall thickness evenly and the rejoice that is difficult for cracking in heat treatment process, therefore adopt the quenching-and-tempering process of " quenching+tempering ".
Under prerequisite in the component that meets cast steel node for " carbon is 0.18～0.25%, silicon≤0.60%, manganese are 1.00～1.60%, phosphorus≤0.03%, sulphur≤0.03%, and surplus is iron ", specific examples is as shown in table 1:
Each constituent mass per-cent of table 1 cast steel node
To adopting melting and cast according to the raw material of said components proportioning, concrete grammar is:
S1: pass through steel scrap rust cleaning, clean and comprise that the alloying element of ferromanganese, ferrochrome and ferrosilicon etc. adds in electric arc furnace;
S2: liquid steel temperature is come out of the stove in the time of 1600～1650 DEG C;
S3: adopt bottom filling ladle to pour into a mould, teeming temperature is controlled at 1500～1580 DEG C.
By according to above-mentioned control method melting with water the cast steel node outpouring and comprise and quenching and the quenching-and-tempering process of tempering is processed it, wherein:
In the temperature rise period of quench treatment, it is per hour below 100 DEG C that 600 DEG C of following heat-up rates are controlled at, and is incubated 4h while being warming up to 600 DEG C, and the heat-up rate of 600～(880 ± 10) DEG C is controlled at per hour below 100 DEG C; Temperature enters holding stage while being 880 ± 10 DEG C, after insulation 5h, quench, and carries out subsequently high tempering processing; In the temperature rise period of high tempering processing, heat-up rate is controlled at per hour below 100 DEG C; In the time that temperature is 600～650 DEG C, enter holding stage, insulation is come out of the stove after 5h, air cooling.
According to the component proportion of table 1, through the cast steel node of above-mentioned melting and cast and thermal treatment aftershaping, its corresponding mechanical property is as shown in table 2.
The mechanical property of table 2 cast steel node
Embodiment 2
A concrete application for certain overpass engineering at home of the low-alloy high-strength cast steel node that construction steel structure is used, material mechanical performance requires material mechanical performance to require tensile strength >=530Mpa, yield strength >=380Mpa, elongation >=20%; The structure of cast steel node is if Fig. 3-1 is to as shown in 3-6, the layout of cast steel node (part) as shown in Figure 4, and 104 of cast steel node quantity, 5 tons of left and right of substance.Obviously, the situation easily cracking in the even and heat treatment process of the complex structure of cast steel node, inhomogeneity of wall thickness, therefore adopt the thermal treatment process of " normalizing+tempering ".
Under the prerequisite that is " carbon is 0.17～0.23%, silicon≤0.60%, manganese≤1.60%, phosphorus≤0.02%, sulphur≤0.02%, chromium≤0.30%, nickel≤1.00%, surplus is iron " in the component that meets cast steel node, specific examples is as shown in table 3:
Each constituent mass per-cent of table 3 cast steel node
To adopting melting and cast according to the raw material of said components proportioning, concrete grammar is:
S1: pass through steel scrap rust cleaning, clean and comprise that the alloying element of ferromanganese, ferrochrome and ferrosilicon etc. adds in electric arc furnace;
S2: liquid steel temperature is come out of the stove in the time of 1600～1650 DEG C;
S3: adopt bottom filling ladle to pour into a mould, teeming temperature is controlled at 1500～1580 DEG C.
By according to above-mentioned control method melting with water the cast steel node outpouring and comprise that the thermal treatment process of normalizing and tempering processes it, wherein:
In the temperature rise period of normalizing treatment, it is per hour below 100 DEG C that 600 DEG C of heat-up rates when following are controlled at, and is incubated 4h while being warmed up to 600 DEG C, and the heat-up rate during 600～(900 ± 10) DEG C is controlled at per hour below 100 DEG C; In the time that temperature is 900 ± 10 DEG C, enter holding stage, after insulation 5h, come out of the stove and carry out forced air-cooling and add water smoke, then it is carried out to temper; The heat-up rate of the temperature rise period of temper is controlled at per hour below 100 DEG C; Temperature enters holding stage while being 600～650 DEG C, be incubated after 4 hours, comes out of the stove, air cooling.
In above-mentioned two embodiment, the normalizing soaking time of " quenching+normalizing " and the tempering insulation time of " normalizing+tempering " can calculate according to the wall thickness of cast steel node, are generally incubated according to 25mm/h; Or calculate according to feed height, be generally incubated according to 4h/m.
According to the component proportion of table 3, through the cast steel node of above-mentioned melting and cast and thermal treatment aftershaping, its corresponding mechanical property is as shown in table 4.
The mechanical property of table 4 cast steel node
As mentioned above, embodiments of the invention are explained, obviously, as long as do not depart from fact inventive point of the present invention and effect, the distortion that will be readily apparent to persons skilled in the art, within being all included in protection scope of the present invention yet.
Claims (8)
1. a low-alloy cast steel node, it is characterized in that, raw material melting by following mass percent is made: carbon (C) is 0.17～0.25%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).
2. a kind of low-alloy cast steel node according to claim 1, it is characterized in that, raw material melting by following mass percent is made: carbon (C) is 0.18～0.25%, silicon (Si)≤0.60%, manganese (Mn) are 1.00～1.60%, phosphorus (P)≤0.03%, sulphur (S)≤0.03%, and surplus is iron (Fe).
3. a kind of low-alloy cast steel node according to claim 1, it is characterized in that, raw material melting by following mass percent is made: carbon (C) is 0.17～0.23%, silicon (Si)≤0.60%, manganese (Mn)≤1.60%, phosphorus (P)≤0.02%, sulphur (S)≤0.02%, also comprise chromium (Cr)≤0.30%, nickel (Ni)≤1.00%, surplus is iron (Fe).
4. the melting of low-alloy cast steel node, a cast control method, is characterized in that, wherein melting operation adopts arc melting, and cast operation adopts bottom filling steel ladle pouring, mainly comprises the following steps:
S1: by through rust cleaning and clean steel scrap with comprise that the alloying element of ferromanganese, ferrochrome and ferrosilicon adds melting in electric arc furnace;
S2: the molten steel of melting is come out of the stove in the time that temperature is 1600～1650 DEG C;
S3: adopt bottom filling ladle to pour into a mould the molten steel of coming out of the stove, the temperature of cast is 1500～1580 DEG C.
5. the thermal treatment process of a kind of low-alloy cast steel node according to claim 2, is characterized in that, comprises quenching processing technology and temper technique, and described quenching processing technology and high tempering treatment process are specially:
Described quenching processing technology process comprises quench temperature rise period and quenching and preserving heat stage, wherein:
Quench the temperature rise period: 600 DEG C of following its heat-up rates of quenching temperature rise period are controlled at per hour below 100 DEG C, be incubated 4h after being warming up to 600 DEG C; Its heat-up rate of quenching temperature rise period of 600 DEG C to 880 ± 10 DEG C is controlled at per hour below 100 DEG C;
The quenching and preserving heat stage: in the time that temperature is 880 ± 10 DEG C, soaking time is calculated according to the wall thickness of cast steel node or feed height;
When described cast steel node reaches after the soaking time of described holding stage needs, after quenching, the cast steel node through above-mentioned quenching processing technology is carried out to high tempering processing, described high tempering treatment process comprises tempering temperature rise period and tempering holding stage, wherein:
The tempering temperature rise period: heat-up rate is controlled at per hour below 100 DEG C, be warming up to 600～650 DEG C;
Tempering holding stage: insulation in the time that temperature is 600～650 DEG C, tempering insulation time calculates according to the wall thickness of described cast steel node or feed height;
The air cooling of coming out of the stove after described cast steel node reaches the soaking time of described tempering holding stage requirement.
6. the thermal treatment process of a kind of low-alloy cast steel node according to claim 3, is characterized in that, comprises normalizing treatment technique and temper technique, and described normalizing treatment technique and temper technique are specially:
Described normalizing treatment technique comprises normalizing temperature rise period and normalizing holding stage, wherein:
The normalizing temperature rise period: 600 DEG C of following normalizing heat-up rates are controlled at per hour below 100 DEG C, be incubated 4h after being heated to 600 DEG C; The normalizing heat-up rate of 600～(900 ± 10) DEG C is controlled at per hour below 100 DEG C;
Normalizing holding stage: in the time that temperature is 900 ± 10 DEG C, tempering insulation time calculates according to the wall thickness of described cast steel node or feed height;
Described cast steel node reaches after the soaking time of described normalizing holding stage requirement, come out of the stove and carry out after forced air-cooling adds water smoke the described cast steel node through above-mentioned normalizing treatment technique to carry out temper, temper technique comprises tempering temperature rise period and tempering holding stage, wherein:
The tempering temperature rise period: heat-up rate is controlled at per hour below 100 DEG C, be warming up to 600～650 DEG C;
Tempering holding stage, insulation in the time that temperature is 600～650 DEG C, tempering insulation time calculates according to the wall thickness of above-mentioned cast steel node or feed height;
The air cooling of coming out of the stove after described cast steel node reaches the soaking time of described tempering holding stage requirement.
7. the production technique with low-alloy high-strength cast steel node according to a kind of construction steel structure described in claim 5 or 6, is characterized in that, described Quenching Soaking Time and described tempering insulation time calculate according to the wall thickness of cast steel node, are incubated according to 25mm/h.
8. the production technique with low-alloy high-strength cast steel node according to a kind of construction steel structure described in claim 5 or 6, is characterized in that, described Quenching Soaking Time and described tempering insulation time calculate according to feed height, are incubated according to 4h/m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410231686.5A CN103993244B (en) | 2014-05-28 | 2014-05-28 | Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410231686.5A CN103993244B (en) | 2014-05-28 | 2014-05-28 | Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103993244A true CN103993244A (en) | 2014-08-20 |
| CN103993244B CN103993244B (en) | 2017-05-17 |
Family
ID=51307568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410231686.5A Active CN103993244B (en) | 2014-05-28 | 2014-05-28 | Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103993244B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004969A (en) * | 2014-05-30 | 2014-08-27 | 宁夏共享装备有限公司 | Outer cylinder casting and thermal treatment method for large-size steam turbine |
| CN104233096A (en) * | 2014-09-20 | 2014-12-24 | 唐山市德龙钢铁有限公司 | Method used for producing 400 MPa level hot rolled ribbed steel bar and capable of reducing alloy cost |
| CN104701104A (en) * | 2014-12-31 | 2015-06-10 | 国家电网公司 | High-voltage circuit breaker |
| CN105483341A (en) * | 2015-12-15 | 2016-04-13 | 常熟市汇海机械制造有限责任公司 | Heat treatment technology of large steel casting |
| CN108951859A (en) * | 2018-08-23 | 2018-12-07 | 北京京城环保股份有限公司 | Using the construction steel structure composite node of CrNiMn high alloy wlding and cast welding construction |
| CN110484695A (en) * | 2019-09-16 | 2019-11-22 | 益阳紫荆福利铸业有限公司 | A kind of welding structure cast steel and its preparation method and application |
| CN113373386A (en) * | 2021-05-22 | 2021-09-10 | 江苏铸鸿重工股份有限公司 | Method for preparing Cr-Ni-Mo alloy steel ingot by utilizing scrap steel |
| CN113431014A (en) * | 2021-07-01 | 2021-09-24 | 中信金属股份有限公司 | Ocean platform casting node with gradually-changed wall thickness and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441133A (en) * | 2003-02-09 | 2003-09-10 | 江苏永益铸管股份有限公司 | Production process of RE low-alloy cast steel node |
| CN102873311A (en) * | 2012-09-19 | 2013-01-16 | 四川凯能机电设备制造有限公司 | Cast steel node manufacturing process |
| CN103128427A (en) * | 2011-12-01 | 2013-06-05 | 安徽跨宇钢结构网架工程有限公司 | Welding construction method of large cast steel modes under low temperature condition |
-
2014
- 2014-05-28 CN CN201410231686.5A patent/CN103993244B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1441133A (en) * | 2003-02-09 | 2003-09-10 | 江苏永益铸管股份有限公司 | Production process of RE low-alloy cast steel node |
| CN103128427A (en) * | 2011-12-01 | 2013-06-05 | 安徽跨宇钢结构网架工程有限公司 | Welding construction method of large cast steel modes under low temperature condition |
| CN102873311A (en) * | 2012-09-19 | 2013-01-16 | 四川凯能机电设备制造有限公司 | Cast steel node manufacturing process |
Non-Patent Citations (6)
| Title |
|---|
| 丁芸孙: "《网架网壳设计与施工》", 31 August 2006, article "铸钢节点", pages: 257 * |
| 戚豹: "《管桁架结构设计与施工》", 31 May 2012, article "钢管桁架的加工与制作", pages: 96-105 * |
| 沈祖炎: "《钢结构制作安装手册》", 30 April 2011, article "钢节点的铸造工艺参数", pages: 754-758 * |
| 钢管桁架的加工与制作;戚豹;《管桁架结构设计与施工》;中国建筑工业出版社;20120531;第96-105页 * |
| 钢节点的铸造工艺参数;沈祖炎;《钢结构制作安装手册》;中国建筑工业出版社;20110430;第754-758页 * |
| 铸钢节点;丁芸孙;《网架网壳设计与施工》;中国建筑工业出版社;20060831;第257页 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104004969A (en) * | 2014-05-30 | 2014-08-27 | 宁夏共享装备有限公司 | Outer cylinder casting and thermal treatment method for large-size steam turbine |
| CN104004969B (en) * | 2014-05-30 | 2016-04-06 | 共享铸钢有限公司 | The casting of a kind of Large steam turbine outer shell and heat treating method |
| CN104233096A (en) * | 2014-09-20 | 2014-12-24 | 唐山市德龙钢铁有限公司 | Method used for producing 400 MPa level hot rolled ribbed steel bar and capable of reducing alloy cost |
| CN104701104A (en) * | 2014-12-31 | 2015-06-10 | 国家电网公司 | High-voltage circuit breaker |
| CN105483341A (en) * | 2015-12-15 | 2016-04-13 | 常熟市汇海机械制造有限责任公司 | Heat treatment technology of large steel casting |
| CN108951859A (en) * | 2018-08-23 | 2018-12-07 | 北京京城环保股份有限公司 | Using the construction steel structure composite node of CrNiMn high alloy wlding and cast welding construction |
| CN110484695A (en) * | 2019-09-16 | 2019-11-22 | 益阳紫荆福利铸业有限公司 | A kind of welding structure cast steel and its preparation method and application |
| CN113373386A (en) * | 2021-05-22 | 2021-09-10 | 江苏铸鸿重工股份有限公司 | Method for preparing Cr-Ni-Mo alloy steel ingot by utilizing scrap steel |
| CN113373386B (en) * | 2021-05-22 | 2024-05-14 | 江苏铸鸿重工股份有限公司 | Method for preparing Cr-Ni-Mo alloy steel ingot by utilizing scrap steel |
| CN113431014A (en) * | 2021-07-01 | 2021-09-24 | 中信金属股份有限公司 | Ocean platform casting node with gradually-changed wall thickness and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103993244B (en) | 2017-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103993244A (en) | Low-alloy cast steel joint as well as smelting and pouring control method and heat treatment process thereof | |
| CN104862443B (en) | A kind of smelting process of low carbon low silicon welding wire steel | |
| CN103194687B (en) | Low-alloy high-strength cast steel for low temperature and preparation method thereof | |
| CN103056548B (en) | High-strength heat-resistant steel gas-shielded solid wire | |
| CN104988283B (en) | Double-phase stainless steel smelting technology | |
| CN109097680B (en) | Method for manufacturing high-manganese high-aluminum nonmagnetic steel plate smelted by 50t intermediate frequency induction furnace | |
| CN106521309A (en) | Heat resisting cast iron boiler furnace bar and preparation method thereof | |
| CN109161671B (en) | High-strength EH36 steel plate for high heat input welding and manufacturing method thereof | |
| CN102424933A (en) | Hot-rolled high-strength strip steel and manufacturing method thereof | |
| CN102560285B (en) | Soft austenitic stainless steel and preparation method thereof | |
| CN104818426B (en) | A kind of high-strength micro-alloy rare earth cast steel and preparation method thereof | |
| CN103966515A (en) | Method for preparing low-alloy high-strength high-toughness cast steel by virtue of electric arc furnace | |
| CN106521299A (en) | Heat treatment method for heat-resistant cast-iron boiler grate bar | |
| CN105648344B (en) | A kind of smelting process of bearing steel, production method and bearing steel | |
| CN103433642B (en) | Low-hydrogen basic electrode for 1Ni9 low-temperature steel welding and preparation method of low-hydrogen basic electrode | |
| CN102978538B (en) | Smelting process for production of grade II hot-rolled reinforced bar | |
| CN104531939B (en) | A kind of smelting process of high alloy high strength steel | |
| CN105088087B (en) | High-toughness optimal welding micro-alloyed cast steel and preparation method thereof | |
| CN105648301A (en) | 42CrMo melting process | |
| CN104988400A (en) | Titanium-microalloyed boron-containing steel and smelting method thereof | |
| WO2019029533A1 (en) | Cast steel, preparation method for cast steel and use of cast steel | |
| JP5293370B2 (en) | Steel excellent in CTOD characteristics of weld heat affected zone and method for producing the same | |
| CN103350290B (en) | A kind of electroslag welding solid core welding wire for low-temperature steel plate | |
| CN102796966A (en) | High-intensity steel and steel pipes and preparation method thereof | |
| CN104032234A (en) | Refractory reinforcing steel bar and production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100027 Beijing city Chaoyang District Gongti North Road No. 4 Applicant after: BMEI CO., LTD. Address before: 100027 Beijing city Chaoyang District Gongti North Road No. 4 Applicant before: High Technologies Co., Ltd., Beijing Electromechanical Academy |
|
| COR | Change of bibliographic data | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |