CN103469047B - A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel - Google Patents
A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel Download PDFInfo
- Publication number
- CN103469047B CN103469047B CN201310423341.5A CN201310423341A CN103469047B CN 103469047 B CN103469047 B CN 103469047B CN 201310423341 A CN201310423341 A CN 201310423341A CN 103469047 B CN103469047 B CN 103469047B
- Authority
- CN
- China
- Prior art keywords
- steel
- weathering steel
- corrosion
- high anti
- sintering
- 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.)
- Expired - Fee Related
Links
Landscapes
- Powder Metallurgy (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
A method for preparing powder metallurgy for high anti-corrosion weathering steel, belongs to steel anticorrosion technique field.The chemical composition of described weathering steel is C0.08-0.23%, P0.11-0.18%, S0.006%, Si0.04-0.07%, N0.006-0.03%, Cu0.03%, Ni0.05%, and surplus is Fe and other inevitable magazine elements.According to the elemental composition ratio of Delhi iron prop, adopt the preparation method of powder metallurgy, prepare a kind of high anti-corrosion weathering steel, its atmospheric corrosion resistance is 2-8 times of general carbon steel, and preparation technology is simple, low to the requirement of equipment, near-net-shape, production cost is low, is applicable to large-scale industrial production, can be widely used in the aspects such as building, machinery, transport facility and conventional weapon.
Description
Technical field
The present invention relates to steel anticorrosion technique field, provide a kind of method for preparing powder metallurgy of high anti-corrosion weathering steel.
Background technology
As everyone knows, mention " from rustless iron prop ", everybody naturally contemplates the Delhi iron prop of India.The pillar of this mystery attracts the eye of the many scientists in the whole world, although the whole body is become by cast iron casting, surface is almost without any rusty stain.
Research shows, Delhi iron prop adopts very pure wrought iron forging to form, carbon containing 0.08-0.23%, phosphorus 0.11-0.18%, sulphur 0.006%, silicon 0.04-0.07%, nitrogen 0.006-0.03%, copper 0.03%, nickel 0.05%, the precious metal containing minute quantity.According to analysis, Delhi iron prop thus stainless may low with its carbon containing, sulfur-bearing is low, phosphorous higher and not relevant containing the factor such as manganese.In addition, iron prop surface has formed the protective film of one deck oxide compound, and this is also the major reason that its erosion resistance is strong.Finally, the material engineering teacher Ramamurthy Baiasubramanian of your (Kanpur) university of Kemp probes into the secret having found this iron prop, in post, phosphorus content is very high, and phosphorus and iron contact with air and there occurs chemical reaction, forms a kind of hydrate (FePO of hydrophosphate
4h
3pO
44H
2o), define the crystal film of one deck densification in the outside of iron prop, prevent the oxygen corrosion pillar in air.
Tradition weathering steel product is due to metallic element Cr, the Ni containing more costliness in component system, and simultaneously containing higher C, its welding property is poor, and production cost is higher simultaneously, constrains the development and apply of weathering steel.And in the iron prop of Delhi, include the precious metal of minute quantity, also there is while greatly reducing production cost excellent corrosion resistance nature, it is further studied Corrosion Of Steel and protection are had great importance.
Summary of the invention
The present invention, according to the corrosion resistance nature of Delhi iron prop excellence, adopts the preparation method of powder metallurgy, according to the elemental composition ratio of Delhi iron prop, prepares a kind of high anti-corrosion weathering steel.This production technique is simple, low to the requirement of equipment, near-net-shape, and production cost is low, is applicable to suitability for industrialized production.
In order to obtain above-mentioned high anti-corrosion weathering steel, present invention employs following technical scheme:
Described high anti-corrosion weathering steel is formed by following composition proportion by mass percentage:
C0.08-0.23%, P0.11-0.18%, S0.006%, Si0.04-0.07%, N0.006-0.03%, Cu0.03%, Ni0.05%, surplus is Fe and other inevitable magazine elements.
Described high anti-corrosion weathering steel is made through mixing → compacting → sintering under above-mentioned formation, and concrete steps are as follows:
(1) by the granularity meeting recipe requirements be 100-500 μm powder mixing, put into rotary mill mixing 1-12 hour, ratio of grinding media to material is 5:1;
(2) mixed powder is carried out mold pressing compacting, pressing pressure is 400MPa-800MPa, pressurize 2-3min, obtains compact specimen;
(3) compact specimen is put into sintering oven atmosphere sintering, sintering temperature is 1000 DEG C-1300 DEG C, and soaking time is 1-2h, obtains weathering steel sample.
Sintering atmosphere described in step (3) can be vacuum, argon gas or nitrogen etc.
In detail alloying element of the present invention will be described below.
C is strengthening element main in steel, if dissolve in the effect playing solution strengthening in matrix.The design of low levels C avoids the formation of pearlitic structure and other carbide, and ensure that the microstructure of steel is equal phase constitution, the potential difference avoided between out-phase causes galvanic corrosion, improves the solidity to corrosion of material.
P is one of the most effective alloying element of erosion resistance improving low alloy steel.Research shows: it is relevant that P element promotes to form stable fine and close component to the restraining effect of corrosion and P element in weathering steel rusty scale, blocks rodent H in corrosive medium
+ion is to the transmission of metallic matrix.In addition, along with the corrosion of steel, P is oxidized to PO4
3-inhibiter effect can also be played, on the one hand PO4 after entering rusty scale
3-can H in complexing thin liquid film
+improve interface pH value, the reduction reaction of slowing down cathode liberation of hydrogen the dissolving slowed down rusty scale; On the other hand, PO4
3-in anodic dissolution processes in steel can with Fe
2+in conjunction with, form the phosphate layer of indissoluble, the carrying out of blocking anode solubilizing reaction, plays the effect of inhibiter.
The existence of S makes steel produce red brittleness, reduces ductility and the toughness of steel, causes crackle when forging and rolling; But the weathering steel adopting powder metallurgy process to prepare does not need to carry out forging and rolling.S is as residual element in the present invention, controls its content not higher than 0.006%.
Si has higher solid solubility in steel, mainly improves the intensity of steel with the form of solution strengthening, crystal grain thinning, is thus conducive to improving toughness.But silicone content is too much, can reduce the welding property of steel.
Ni can improve the corrosion resisting property of weathering steel and can improve the intensity of weathering steel, prevents the embrittlement of steel.
Cu has solid solution and precipitation strength effect, can improve intensity and toughness, particularly improves the atmospheric corrosion resistance of steel; Meanwhile, Cu and S generates the sulfide of indissoluble, counteracts S to the corrosion proof deleterious effect of steel.
N element is not only conducive to the precipitating reinforcing effect significantly improving weathering steel, and is conducive to the control of strengthening effect.
Advantage of the present invention:
1, near-net-shape, production cost is low, preparation technology is simple, production process safety and environmental protection, be applicable to large-scale industrial production.
2, steel grade of the present invention has excellent atmospheric corrosion resistance, and atmospheric corrosion resistance is 2-8 times of general carbon steel.
3, steel grade of the present invention adopts powder metallurgy fabrication process, does not need forging or rolling, effectively ensure that delivery cycle, reduce production cost.
4, the aspects such as building, machinery, transport facility and conventional weapon can be widely used in.
Accompanying drawing illustrates:
Fig. 1 is the representative microstructure pattern of the weathering steel that the present invention relates to.
Fig. 2 is the electric polarization curve of weathering steel and the general carbon steel that the present invention relates to; Wherein, simulated solution is 3.5%(mass percent) NaCl solution.
Embodiment
Embodiment 1:
A kind of solidity to corrosion weathering steel is constructed as follows by weight percentage:
C0.1%, P0.15%, S0.002%, Si0.04%, N0.01%, Cu0.03%, Ni0.05%, surplus is Fe;
Step 1: will meet each raw material powder mixing of the granularity 200 μm of recipe requirements, put into rotary mill mixing 2 hours, ratio of grinding media to material is 5:1;
Step 2: mixed powder is carried out mold pressing compacting, pressing pressure is 500MPa, pressurize 3min, obtains compact specimen;
Step 3: compact specimen is put into sintering oven vacuum sintering, sintering temperature is 1050 DEG C, and soaking time is 2h, obtains weathering steel sample.
Embodiment 2:
A kind of solidity to corrosion weathering steel is constructed as follows by weight percentage:
C0.2%, P0.18%, S0.004%, Si0.06%, N0.015%, Cu0.01%, Ni0.05%, surplus is Fe;
Step 1: each raw material powder mixing by the granularity meeting recipe requirements being 350 μm, put into rotary mill mixing 6 hours, ratio of grinding media to material is 5:1;
Step 2: mixed powder is carried out mold pressing compacting, pressing pressure is 600MPa, pressurize 3min, obtains compact specimen;
Step 3: compact specimen is put into sintering oven nitrogen atmosphere sintering, sintering temperature is 1200 DEG C, and soaking time is 2h, obtains weathering steel sample.
Embodiment 3:
A kind of solidity to corrosion weathering steel is constructed as follows by weight percentage:
C0.15%, P0.11%, S0.006%, Si0.07%, N0.03%, Cu0.03%, Ni0.03%, surplus is Fe;
Step 1: each element powders mixing by the granularity meeting recipe requirements being 500 μm, put into rotary mill mixing 10 hours, ratio of grinding media to material is 5:1;
Step 2: mixed powder is carried out mold pressing compacting, pressing pressure is 800MPa, pressurize 2min, obtains compact specimen;
Step 3: compact specimen is put into sintering oven argon gas atmosphere sintering, sintering temperature is 1300 DEG C, and soaking time is 1h, obtains weathering steel sample.
Claims (1)
1. the method for preparing powder metallurgy of a high anti-corrosion weathering steel, it is characterized in that, formed by following composition proportion according to mass percent: C 0.08-0.23%, P 0.11-0.18%, S 0.006%, Si 0.04-0.07%, N 0.006-0.03%, Cu 0.03%, Ni 0.05%, surplus is Fe and other inevitable impurity elements;
Concrete preparation process is as follows:
(1) by the granularity meeting recipe requirements be 100 ?500 μm powder mixing, put into rotary mill mixing 1-12 hour, ratio of grinding media to material is 5:1;
(2) mixed powder is carried out mold pressing compacting, pressing pressure is 400MPa-800MPa, pressurize 2-3min, obtains compact specimen;
(3) compact specimen is put into sintering oven atmosphere sintering, sintering temperature is 1000 DEG C-1300 DEG C, and soaking time is 1-2h, obtains weathering steel product;
Described in step (3), sintering atmosphere is vacuum, argon gas or nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423341.5A CN103469047B (en) | 2013-09-17 | 2013-09-17 | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310423341.5A CN103469047B (en) | 2013-09-17 | 2013-09-17 | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103469047A CN103469047A (en) | 2013-12-25 |
| CN103469047B true CN103469047B (en) | 2015-10-28 |
Family
ID=49794084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310423341.5A Expired - Fee Related CN103469047B (en) | 2013-09-17 | 2013-09-17 | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103469047B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103741048B (en) * | 2013-12-28 | 2016-05-04 | 扬州立德粉末冶金股份有限公司 | A kind of piston of gasoline engine packing and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518563A (en) * | 1981-07-01 | 1985-05-21 | Toyota Jidosha Kabushiki Kaisha | Method for manufacturing a slide member |
| JP2002309303A (en) * | 2001-04-13 | 2002-10-23 | Harima Chem Inc | Metal particle composition for manufacturing alloy |
| CN1609256A (en) * | 2003-10-17 | 2005-04-27 | 鞍山科技大学 | Powder metallurgy steel rolling guide roll and producing method thereof |
| CN101187398A (en) * | 2007-11-30 | 2008-05-28 | 洛阳轴研科技股份有限公司 | Bearing spacer ring made from powder metallurgical material |
| CN102162070A (en) * | 2011-03-30 | 2011-08-24 | 中南大学 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
-
2013
- 2013-09-17 CN CN201310423341.5A patent/CN103469047B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4518563A (en) * | 1981-07-01 | 1985-05-21 | Toyota Jidosha Kabushiki Kaisha | Method for manufacturing a slide member |
| JP2002309303A (en) * | 2001-04-13 | 2002-10-23 | Harima Chem Inc | Metal particle composition for manufacturing alloy |
| CN1609256A (en) * | 2003-10-17 | 2005-04-27 | 鞍山科技大学 | Powder metallurgy steel rolling guide roll and producing method thereof |
| CN101187398A (en) * | 2007-11-30 | 2008-05-28 | 洛阳轴研科技股份有限公司 | Bearing spacer ring made from powder metallurgical material |
| CN102162070A (en) * | 2011-03-30 | 2011-08-24 | 中南大学 | Connecting rod material for engines in powder metallurgy and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| On the corrosion resistance of the Delhi iron pillar;R.Balasubramaniam;《Corrosion Science》;20001231;第42卷(第12期);2103-2129，第2107页最后1段，2108页表1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103469047A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101558276B1 (en) | Ferritic stainless steel excellent in corrosion resistance and conductivity and method for manufacturing the same, separator of proton-exchange membrane fuel cell and proton-exchange membrane fuel cell | |
| JP5979331B1 (en) | Ferritic stainless steel material, polymer electrolyte fuel cell separator and polymer electrolyte fuel cell using the same | |
| KR20120036356A (en) | Stainless steel for fuel cell having excellent corrosion resistance and method for producing same | |
| CN104878248B (en) | High temperature alloy 625H and its manufacturing process | |
| WO2019058409A1 (en) | Stainless steel sheet and production method therefor, separator for solid polymer fuel battery, solid polymer fuel battery cell and solid polymer fuel battery | |
| CN108286026A (en) | A kind of An industrial atmospheric corrosion resistant rebar and preparation method thereof | |
| Mi et al. | Industrial atmospheric corrosion resistance of P-RE weathering steel | |
| KR101506103B1 (en) | Method for producing a strengthened alloy by plasma nitriding | |
| CN103469047B (en) | A kind of method for preparing powder metallurgy of high anti-corrosion weathering steel | |
| CN102021485A (en) | Medium carbon alloy steel | |
| CN105256296B (en) | A kind of 35CrMnSi steel normal cryochemistry conversion fluid and preparation method thereof | |
| CN104131204A (en) | Magnesium alloy, magnesium alloy composite material and preparation method of composite material | |
| CN116694978B (en) | Low-cost heat-resistant stainless medium-entropy alloy and preparation method thereof | |
| CN102586686B (en) | Clean corrosion-resistant steel for ocean engineering and manufacturing method thereof | |
| CN114080457A (en) | Ferritic stainless steel sheet for current collector of sulfide-based solid battery and method for producing same | |
| CN115627428B (en) | Seawater desalination engineering pipeline and preparation method thereof | |
| JP7257794B2 (en) | Stainless steel plate and its manufacturing method, fuel cell separator, fuel cell, and fuel cell stack | |
| Mehta et al. | Effect of chromium on the corrosion behaviour of powder-processed Fe-0.45 wt% P alloys | |
| CHEN et al. | Electrochemical corrosion behaviour of Zn-Sn-Cu-xNi lead-free solder alloys | |
| CN113322419B (en) | High-temperature-resistant high-toughness stainless steel pipe fitting and preparation method thereof | |
| US11535915B2 (en) | Stainless steel material, constituting component, cell, and fuel cell stack | |
| Mehta et al. | Effect of silicon on the corrosion behavior of powder-processed phosphoric irons | |
| CN108666065A (en) | A kind of Ce based permanent magnetic materials of high corrosion-resistant and preparation method thereof | |
| Yi et al. | A Magnetic Properties and Corrosion Resistance of Fe-Si Alloy Coating Prepared on Mild Steel | |
| Syugaev et al. | Electrochemical properties of iron silicocarbide and cementite in acidic and neutral environments |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151028 Termination date: 20190917 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |