CN106834636A - A kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness - Google Patents
A kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness Download PDFInfo
- Publication number
- CN106834636A CN106834636A CN201710044503.2A CN201710044503A CN106834636A CN 106834636 A CN106834636 A CN 106834636A CN 201710044503 A CN201710044503 A CN 201710044503A CN 106834636 A CN106834636 A CN 106834636A
- Authority
- CN
- China
- Prior art keywords
- technology
- steel
- heating processing
- low
- impact toughness
- 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
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/002—Heat treatment of ferrous alloys containing Cr
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D2211/00—Microstructure comprising significant phases
Abstract
The invention provides a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness, processed using hardening and tempering process, including：Step 1, by cast steel heating furnace high temperature quench, 880 DEG C~950 DEG C of hardening heat, be incubated 4~6 hours, enter water cooling, enter water time≤1min；Step 2, temper is carried out, temperature is 660 DEG C~710 DEG C, is incubated 4~6 hours, is then air cooled to room temperature.Beneficial effects of the present invention are：The steel-casting obtained using Technology for Heating Processing of the present invention, with intensity higher, plasticity and impact flexibility；While plasticity index is not less than widely used ZG270 500 and requires, yield strength >=400MPa, tensile strength >=550MPa, 40 DEG C of impact flexibility has exceeded 30J.
Description
Technical field
The invention belongs to bridge pad with anti-corrosion steel-casting production technical field, specifically providing a kind of Cr contents is
The anti-corrosion steel-casting intensity of raising and the Technology for Heating Processing of low-temperature impact toughness of 3-5%.
Background technology
Bridge pad is the important feature part for connecting bridge superstructure and substructure, and it can be by bridge superstructure
Counter-force and deformation (displacement and corner) reliably pass to bridge substructure.Therefore, to bridge pad cast steel in GB
The mechanical property of part is distinctly claimed, and its material typically selects ZG270-500, to common engineering casting carbon in GB/T 11352
The mechanical property requirements of steel part are shown in Table 1, but because cast carbon steel part intensity is relatively low in standard so that bearing is generally heavier；Punching
Toughness is hit for room temperature impact, conventional environment is only applicable to and is used.With the extensive construction of bridge, cast steel material used by bearing is used
Amount increase, the lightweight of bearing is suggested；The Service Environment of bearing is harsher, right particularly in corrosive environment and cold district
The impact flexibility of bridge pad proposes requirement higher.
The common engineering of table 1 cast carbon steel part mechanical property (>=)
A kind of corrosion resistant bridge bearing Heat-Treatment of Steel technique, the Shen are elaborated in patent CN201511009728.1
Please will be cooled to room temperature with certain type of cooling after bearing steel normalized treatment to obtain intensity ZG270-500, ZG310-
570th, the Technology for Heating Processing of ZG340-640.But, the patent has only carried out a normalized treatment with steel to bridge pad, causes
Yield strength in patent major part embodiment is not up to 400MPa ranks.
A kind of heat treatment work of the anti-corrosion steel-casting impact flexibility of raising 3Cr is elaborated in patent CN201610936335.3
Skill, this application uses double normalizing Technology for Heating Processing, it is ensured that even tissue is refined, and improves the impact of 3Cr corrosion resistant bridge bearings
The Technology for Heating Processing of toughness.But, this technique is only applicable to the steel-casting that Cr contents are 3%, and surrender in embodiment is strong
Degree is not up to 400MPa ranks, and tensile strength is not up to 550MPa ranks.
In order to solve the above problems, and for the light-weighted demand of bearing and the severe rugged environment of military service, the present invention is proposed
A kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness, compared with ZG270-500, is ensureing that plasticity refers to
On the premise of mark is not reduced, the intensity and low-temperature impact toughness of the bridge pad that high-Cr is 3-5% are put forward, it is ensured that bridge pad
Under corrosion and cold environment resist shock loading ability and safe military service performance, for the lightweight of bearing provides design according to
According to.
The content of the invention
Object of the present invention is to provide a kind of heat treatment work for improving anti-corrosion steel-casting intensity and low-temperature impact toughness
Skill, by carrying high-Cr for 3-5%, and by quenching and temper, effectively increases the intensity of anti-corrosion steel-casting and low
Warm impact flexibility.
The technical scheme is that：
A kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness, at hardening and tempering process
Reason, comprises the following steps：
Step 1, by cast steel heating furnace high temperature quench, 880 DEG C~950 DEG C of hardening heat, be incubated 4~6 hours, enter water
Cooling, enters water time≤1min；
Step 2, temper is carried out, temperature is 660 DEG C~710 DEG C, is incubated 4~6 hours, is then air cooled to room
Temperature.
The purpose of quenching is that, in order to obtain martensitic structure, the purpose of high tempering is to obtain ferrite+acinous carburizing
The mixture of body, i.e. tempered sorbite tissue.High tempering is conducive to thoroughly eliminating internal stress, improves the plasticity of steel-casting and tough
Property, excellent comprehensive mechanical property is obtained, so as to ensure that steel-casting obtains intensity higher, plasticity and impact flexibility.
Further, Cr contents are 3%~5% in the cast steel.
Further, Cr contents are 3.23%~4.67% in the cast steel.
The Cr alloying component systems of meaning 3-5% of the invention belong to anti-corrosion steel-casting, Cr constituent contents in 3-5%, institute
The anti-corrosion steel-casting being prepared into has the characteristics that：1) passivation ability of steel is improved；2) electrode potential of steel matrix is improved；3) promote
Enter the formation that form compact and stable protectiveness embroiders layer；4) matrix, crystal grain thinning are solid-solution in, hence it is evident that increase the intensity of steel；5) reduce and face
Boundary's cooling velocity, improves quenching degree.Solid solution Cr can significantly improve the quenching degree of steel while Cr easily forms dense oxidation film and can show
Write the corrosion resistance for improving steel.
Further, 892~925 DEG C of hardening heat in the step 1, is incubated 4.7~5.3 hours, enters water cooling, enters water
Time≤0.85min.
Further, temperature is 689 DEG C~702 DEG C in the step 2, is incubated 4.3~5.7 hours, then air cooling
To room temperature.
Further, all tempered sorbites of the microstructure of the cast steel.
Further, the tempered sorbite includes ferrite and particulate globular cementite, and the ferrite content is 97.8-
98.9%, the content range of the particulate globular cementite is 1.1%-2.2%.
The invention has the advantages that：
1) steel-casting obtained using Technology for Heating Processing of the present invention, with intensity higher, plasticity and impact flexibility；
2) while plasticity index is not less than widely used ZG270-500 requirements, yield strength >=400MPa, tension
Intensity >=550MPa, -40 DEG C of impact flexibility has exceeded 30J；
3) this invention ensures that bridge pad resists the ability and safety clothes of shock loading under corrosion and cold environment
Labour performance, and for the lightweight of bearing provides design considerations.
Brief description of the drawings
Fig. 1 is the metallographic structure schematic diagram of anti-corrosion steel-casting of the invention.
Specific embodiment
The preferred embodiments of the present invention are specifically described below in conjunction with the accompanying drawings, wherein, accompanying drawing constitutes the application part, and
It is used to explain principle of the invention together with embodiments of the present invention.
The main chemical compositions of embodiments of the invention and comparative example, Technology for Heating Processing and mechanical property are shown in Table 2,3,4.
Each embodiment of table 2 and comparative example main chemical compositions (%)
| Experiment steel | C | Si | Mn | P | S | Cu | Cr | Ni | Al | V | Mo |
| Embodiment 1 | 0.10 | 0.50 | 1.38 | 0.005 | 0.006 | 0.39 | 3.14 | 1.44 | 0.12 | - | 0.04 |
| Embodiment 2 | 0.15 | 0.21 | 0.87 | 0.007 | 0.004 | 0.35 | 4.65 | 0.39 | 0.23 | - | - |
| Embodiment 3 | 0.08 | 0.65 | 0.79 | 0.008 | 0.005 | 0.57 | 4.90 | 0.58 | 0.06 | 0.04 | - |
| Embodiment 4 | 0.12 | 0.46 | 0.98 | 0.006 | 0.005 | 0.62 | 3.54 | 0.73 | 0.18 | - | 0.20 |
| Embodiment 5 | 0.09 | 0.30 | 1.06 | 0.006 | 0.003 | 0.12 | 3.87 | 1.75 | 0.08 | 0.05 | - |
| Embodiment 6 | 0.09 | 0.57 | 0.57 | 0.008 | 0.005 | 0.36 | 4.01 | 0.84 | 0.15 | - | - |
| Embodiment 7 | 0.11 | 0.63 | 0.84 | 0.005 | 0.006 | 0.41 | 3.78 | 1.26 | 0.09 | - | 0.07 |
| Embodiment 8 | 0.12 | 0.29 | 0.95 | 0.007 | 0.007 | 0.49 | 4.33 | 1.90 | 0.02 | 0.06 | - |
| Embodiment 9 | 0.09 | 0.77 | 1.19 | 0.006 | 0.005 | 0.24 | 3.31 | 0.88 | 0.06 | - | - |
| Comparative example 1 | 0.15 | 0.16 | 0.50 | <0.01 | <0.01 | 0.30 | 3.27 | 0.52 | 0.014 | - | - |
The embodiment of the present invention Cr contents of table 3 are the anti-corrosion steel-casting Technology for Heating Processing of 3-5%
The Cr contents of the present invention of table 4 are the mechanical property of the anti-corrosion steel-casting of 3-5%
The metallographic structure that the present invention is obtained is mainly tempered sorbite, and its tissue signature's (× 100 times) is as shown in Figure 1.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in,
Should all be included within the scope of the present invention.
Claims (7)
1. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness, it is characterised in that use quenched work
Skill is processed, and is comprised the following steps：
Step 1, by cast steel heating furnace high temperature quench, 880 DEG C~950 DEG C of hardening heat, be incubated 4~6 hours, enter water-cooled
But, water time≤1min is entered；
Step 2, temper is carried out, temperature is 660 DEG C~710 DEG C, is incubated 4~6 hours, is then air cooled to room temperature.
2. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness according to claim 1, its
It is characterised by, Cr contents are 3%~5% in the cast steel.
3. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness according to claim 2, its
It is characterised by, Cr contents are 3.23%~4.67% in the cast steel.
4. the Technology for Heating Processing of a kind of anti-corrosion steel-casting intensity of raising and low-temperature impact toughness according to Claims 2 or 3,
Characterized in that, 892~925 DEG C of hardening heat in the step 1, be incubated 4.7~5.3 hours, enter water cooling, enter the water time≤
0.85min。
5. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness according to claim 4, its
It is characterised by, temperature is 689 DEG C~702 DEG C in the step 2, is incubated 4.3~5.7 hours, is then air cooled to room temperature.
6. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness according to claim 5, its
It is characterised by, all tempered sorbites of microstructure of the cast steel.
7. a kind of Technology for Heating Processing for improving anti-corrosion steel-casting intensity and low-temperature impact toughness according to claim 6, its
It is characterised by, the tempered sorbite includes ferrite and particulate globular cementite, the ferrite content is 97.8-98.9%,
The content range of the particulate globular cementite is 1.1%-2.2%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044503.2A CN106834636B (en) | 2017-01-19 | 2017-01-19 | A kind of heat treatment process improving anti-corrosion steel-casting intensity and low-temperature impact toughness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710044503.2A CN106834636B (en) | 2017-01-19 | 2017-01-19 | A kind of heat treatment process improving anti-corrosion steel-casting intensity and low-temperature impact toughness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106834636A true CN106834636A (en) | 2017-06-13 |
| CN106834636B CN106834636B (en) | 2019-06-04 |
Family
ID=59119932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710044503.2A Active CN106834636B (en) | 2017-01-19 | 2017-01-19 | A kind of heat treatment process improving anti-corrosion steel-casting intensity and low-temperature impact toughness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106834636B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778381A (en) * | 2020-07-01 | 2020-10-16 | 锦州捷通铁路机械股份有限公司 | Heat treatment method for improving plasticity and low-temperature impact toughness of C-grade steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0460591A1 (en) * | 1990-06-05 | 1991-12-11 | The Ferrous Wheel Group, Inc. | High performance high strength low alloy steel |
| US20030019549A1 (en) * | 2001-03-13 | 2003-01-30 | Turconi Gustavo Javier Lopez | Low-alloy carbon steel for the manufacture of pipes for exploration and the production of oil and/or gas having an improved corrosion resistance, a process for the manufacture of seamless pipes, and the seamless pipes obtained therefrom |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
| CN102392115A (en) * | 2011-11-07 | 2012-03-28 | 烟台宝钢钢管有限责任公司 | Thermal treatment method for high-grade steel casing pipe with reasonable deep processing properties |
| CN103898283A (en) * | 2014-03-25 | 2014-07-02 | 宁夏共享集团有限责任公司 | Tempering heat treatment process of high-strength steel |
| CN104878311A (en) * | 2015-06-15 | 2015-09-02 | 三明市毅君机械铸造有限公司 | Cast steel part for ultra-supercritical thermal power generating unit and production process of cast steel part |
-
2017
- 2017-01-19 CN CN201710044503.2A patent/CN106834636B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0460591A1 (en) * | 1990-06-05 | 1991-12-11 | The Ferrous Wheel Group, Inc. | High performance high strength low alloy steel |
| US20030019549A1 (en) * | 2001-03-13 | 2003-01-30 | Turconi Gustavo Javier Lopez | Low-alloy carbon steel for the manufacture of pipes for exploration and the production of oil and/or gas having an improved corrosion resistance, a process for the manufacture of seamless pipes, and the seamless pipes obtained therefrom |
| CN101481995A (en) * | 2008-01-11 | 2009-07-15 | 江苏嘉宝科技制管有限公司 | High steel level petroleum casing pipe and oil pipe manufacturing process |
| CN102392115A (en) * | 2011-11-07 | 2012-03-28 | 烟台宝钢钢管有限责任公司 | Thermal treatment method for high-grade steel casing pipe with reasonable deep processing properties |
| CN103898283A (en) * | 2014-03-25 | 2014-07-02 | 宁夏共享集团有限责任公司 | Tempering heat treatment process of high-strength steel |
| CN104878311A (en) * | 2015-06-15 | 2015-09-02 | 三明市毅君机械铸造有限公司 | Cast steel part for ultra-supercritical thermal power generating unit and production process of cast steel part |
Non-Patent Citations (1)
| Title |
|---|
| 赵章明等: "《油气井腐蚀防护与材质选择指南》", 31 January 2011 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111778381A (en) * | 2020-07-01 | 2020-10-16 | 锦州捷通铁路机械股份有限公司 | Heat treatment method for improving plasticity and low-temperature impact toughness of C-grade steel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106834636B (en) | 2019-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103510024B (en) | For the alloy cast steel of brake disc of high-speed train and heat treatment method thereof and the brake disc of high-speed train manufactured by this alloy cast steel | |
| CN108728743B (en) | The good Marine Engineering Steel of low temperature fracture toughness and its manufacturing method | |
| CN105088090A (en) | Armor plate with tensile strength being 2000 MPa and manufacturing method thereof | |
| CN106222544B (en) | Annular forging piece and its heat treatment method | |
| CN107326302B (en) | A kind of anti-corrosion bainitic steel, rail and preparation method | |
| CN110863140B (en) | Low-alloy ultrahigh-strength structural steel and preparation method thereof | |
| CN109609848A (en) | High tough antifatigue nano-scaled precipitate enhancing Ma-Austria's Multiphase Steel and preparation method thereof | |
| CN102234743A (en) | Low carbon martensite steel plate and production method | |
| CN102719753B (en) | Low-yield-ratio high-strength steel plate and manufacturing method thereof | |
| CN102605271A (en) | Low-alloy high-intensity high-toughness steel and production method of low-alloy high-intensity high-toughness steel | |
| CN105018854A (en) | High-heat-resistance hot work die steel and preparation method | |
| CN104498834A (en) | Components of high-toughness ultrahigh-strength steel and preparation process of high-toughness ultrahigh-strength steel | |
| CN109972042A (en) | A kind of yield strength 800MPa grades of Low temperature-resistancorrosion-resistant corrosion-resistant H profile steels and preparation method thereof | |
| CN104073736A (en) | 10Ni10Co high-toughness secondary-hardening ultrahigh-strength steel and preparation method thereof | |
| CN106148651A (en) | Containing Al joint Co type high specific strength Secondery-hardening Ultrahigh Strength Steel and preparation method | |
| CN105587773A (en) | High-hardness bearing | |
| CN106756612A (en) | A kind of easy laser welding hull plate steel of bainite/martensite/austenite high-ductility and manufacture method | |
| CN106756489A (en) | 450 grades of anti-crack high-strength abrasion-proof steels of Brinell hardness and its manufacture method | |
| CN114836694B (en) | Marine seawater corrosion fatigue resistant ultra-high strength steel and manufacturing method thereof | |
| CN105039861A (en) | Medium-manganese and boracic low-alloy abrasion-resistant steel plate and preparing method thereof | |
| CN104911499B (en) | Cu strengthens Co free Secondery-hardening Ultrahigh Strength Steels and preparation method | |
| JP2011510175A (en) | High alloy cold die steel | |
| CN106148826A (en) | A kind of Al, Cu strengthen high-strength stainless refractory steel and preparation method | |
| CN106834929A (en) | Corrosion-resistant cast steel and its Technology for Heating Processing under a kind of environment suitable for atmospheric corrosion | |
| CN102260823A (en) | Economic high-strength steel plate with yield strength of 690MPa, and manufacture method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee after: CHINA ACADEMY OF RAILWAY SCIENCES RAILWAY ENGINEERING Research Institute Patentee after: HEBEI TONGCHUANG TRAFFIC ENGINEERING MATCHING PRODUCT INDUSTRY TECHNOLOGY Co.,Ltd. Patentee after: CENTRAL IRON AND STEEL Research Institute Patentee after: ZHONGLIAN ADVANCED STEEL TECHNOLOGY Co.,Ltd. Patentee after: Hengshui Zhongyu Tiexin equipment Engineering Co.,Ltd. Address before: 100081 Beijing city Haidian District Daliushu Road No. 2 Patentee before: CHINA ACADEMY OF RAILWAY SCIENCES RAILWAY ENGINEERING Research Institute Patentee before: HEBEI TONGCHUANG TRAFFIC ENGINEERING MATCHING PRODUCT INDUSTRY TECHNOLOGY Co.,Ltd. Patentee before: CENTRAL IRON AND STEEL Research Institute Patentee before: ZHONGLIAN ADVANCED STEEL TECHNOLOGY Co.,Ltd. Patentee before: HENGSHUI YUCHANG CASTING CO.,LTD. |
|
| CP01 | Change in the name or title of a patent holder |