CN104789904A - High strength steel sheet for light mold shelf and heat treatment technology of high strength steel sheet - Google Patents
High strength steel sheet for light mold shelf and heat treatment technology of high strength steel sheet Download PDFInfo
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- CN104789904A CN104789904A CN201510123539.0A CN201510123539A CN104789904A CN 104789904 A CN104789904 A CN 104789904A CN 201510123539 A CN201510123539 A CN 201510123539A CN 104789904 A CN104789904 A CN 104789904A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/04—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing
- C21D8/0421—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips to produce plates or strips for deep-drawing characterised by the working steps
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
Abstract
The invention discloses a high strength steel sheet for a light mold shelf and a heat treatment technology of the high strength steel sheet. The steel sheet comprises the following ingredients by mass percentage: 0.43-0.45% of carbon, 0.63-0.65% of manganese, 0.74-0.76% of gallium, 0.42-0.44% of antimony, 0.21-0.23% of aluminum, 1.44-1.46% of germanium, 1.82-1.84% of vanadium, 2.76-2.79% of titanium, 1.63-1.67% of cuprum, 0.07-0.09% of sulfur, 3.72-3.75% of chromium, 0.06-0.08% of barium, 5.20-5.22% of nickel, 0.36-0.38% of niobium, 2.42-2.44% of magnesium and the balance of Fe and unavoidable impurities. The surface of the steel sheet is coated with a corrosion resistant alloy coating which is 3-5mm in thickness.
Description
Technical field
The invention belongs to Storage and circulation equipment field, relate to a kind of high tensile steel plate for light-duty mould shelf and thermal treatment process thereof.
Background technology
The important tool that shelf are warehouse modernization and raise the efficiency, and market requirement share is more and more higher.Along with economic jump development, foreign capital affiliate pours into China Yangtze River Delta, the Delta of the Pearl River one band in a large number, not only drive the development of local economy, and brought new management philosophy and administrative skill, more and more employing automated storing in current storage rack storehouse.
The light-duty mould shelf used in storage, the usage quantity of steel plate is very large, and it is very strict to the requirement of steel plate, especially for rub resistance ability, the resistance to corrosion and resistance of oxidation etc. of steel plate, these factors directly have influence on the work-ing life of steel plate and the height of cost, so it is high to be badly in need of a kind of intensity, and rub resistance ability and resistance of oxidation, and cost is low, the steel plate of long service life.
Summary of the invention
Technical problem to be solved by this invention is, overcome the shortcoming of prior art, provide a kind of high tensile steel plate for light-duty mould shelf and thermal treatment process thereof, not only intensity is high, resistance to corrosion and resistance of oxidation extremely strong, and the rub resistance ability on its surface improves greatly, reduce its wearing and tearing, increase its work-ing life, and thermal treatment process is provided, method is simple, and cost is low, effective.
In order to solve above technical problem, the invention provides a kind of high tensile steel plate for light-duty mould shelf, the composition of this steel plate and mass percent are: carbon: 0.43-0.45%, manganese: 0.63-0.65%, gallium: 0.74-0.76%, antimony: 0.42-0.44%, aluminium: 0.21-0.23%, germanium: 1.44-1.46%, vanadium: 1.82-1.84%, titanium: 2.76-2.79%, copper: 1.63-1.67%, sulphur: 0.07-0.09%, chromium: 3.72-3.75%, barium: 0.06-0.08%, nickel: 5.20-5.22%, niobium: 0.36-0.38%, magnesium: 2.42-2.44%, surplus is Fe and inevitable impurity,
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 3-5mm, and the composition of corrosion resisting alloy coating and mass percent are:
Carbon: 0.12-0.14%, manganese: 6.32-6.38%, gallium: 0.54-0.56%, rubidium: 0.32-0.34%, cadmium: 0.81-0.83%, germanium: 6.23-6.25%, vanadium: 2.16-2.18%, tungsten: 3.36-3.39%, copper: 0.63-0.67%, chromium: 15.75-15.79%, nickel: 12.5-12.8%, erbium: 2.42-2.44%, promethium: 3.52-3.58%, surplus is Fe and inevitable impurity.
The present invention is also provided for the thermal treatment process of the high tensile steel plate of light-duty mould shelf, and concrete technology is as follows:
Step (1): the steel plate forged is heated to 1270-1275 DEG C by high-frequency quenching stove, insulation 1-2h, then air cooling is to 850-855 DEG C, adopt and to be air-cooledly combined with water-cooled, first adopt the air-cooled rate of cooling with 7-9 DEG C/s that steel plate is cooled to 650-660 DEG C, adopt water-cooled, with the rate of cooling of 5-8 DEG C/s, steel plate is chilled to 340-350 DEG C, be then heated to 870-880 DEG C, insulation 50-55min, then air cooling is to room temperature;
Step (2): configuration corrosion resisting alloy coated powder, utilize spraying equipment to surface of steel plate even application 0.5-1mm alloy coat, then 880-890 DEG C is heated to, pass into nitrogen as shielding gas, keep 1-3h, then steel plate is adopted water-cooled, 550-560 DEG C is cooled to the speed of 10-12 DEG C/s, and then utilize spraying equipment to surface of steel plate even application 0.5-4mm alloy coat, then be heated to 930-940 DEG C, insulation 25-30min, adopts air-cooled, be cooled to 430-440 DEG C with the speed of 5-9 DEG C/s, then at air cooling to room temperature;
Step (2): surface of steel plate is evenly sprayed one deck powdered graphite, thickness is 0.6-0.8mm, then 350-360 DEG C is heated to, insulation 35-40min, reheat to 780-790 DEG C, insulation 2-4h, then adopt nitrogen cooling, be cooled to 320-330 DEG C with the speed of 6-7 DEG C/s, then air cooling is to room temperature;
Step (3): cleaning surface of steel plate, then air cooling is to room temperature.
The technical scheme that the present invention limits further is:
The aforesaid high tensile steel plate for light-duty mould shelf, the composition of this steel plate and mass percent are: carbon: 0.43%, manganese: 0.63%, gallium: 0.74%, antimony: 0.42%, aluminium: 0.21%, germanium: 1.44%, vanadium: 1.82%, titanium: 2.76%, copper: 1.63%, sulphur: 0.07%, chromium: 3.72%, barium: 0.06%, nickel: 5.20%, niobium: 0.36%, magnesium: 2.42%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 3mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.12%, manganese: 6.32%, gallium: 0.54%, rubidium: 0.32%, cadmium: 0.81%, germanium: 6.23%, vanadium: 2.16%, tungsten: 3.36%, copper: 0.63%, chromium: 15.75%, nickel: 12.5%, erbium: 2.42%, promethium: 3.52%, surplus is Fe and inevitable impurity.
The aforesaid high tensile steel plate for light-duty mould shelf, the composition of this steel plate and mass percent are: carbon: 0.45%, manganese: 0.65%, gallium: 0.76%, antimony: 0.44%, aluminium: 0.23%, germanium: 1.46%, vanadium: 1.84%, titanium: 2.79%, copper: 1.67%, sulphur: 0.09%, chromium: 3.75%, barium: 0.08%, nickel: 5.22%, niobium: 0.38%, magnesium: 2.44%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 5mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.14%, manganese: 6.38%, gallium: 0.56%, rubidium: 0.34%, cadmium: 0.83%, germanium: 6.25%, vanadium: 2.18%, tungsten: 3.39%, copper: 0.67%, chromium: 15.79%, nickel: 12.8%, erbium: 2.44%, promethium: 3.58%, surplus is Fe and inevitable impurity.
The aforesaid high tensile steel plate for light-duty mould shelf, the composition of this steel plate and mass percent are: carbon: 0.44%, manganese: 0.64%, gallium: 0.75%, antimony: 0.43%, aluminium: 0.22%, germanium: 1.45%, vanadium: 1.83%, titanium: 2.77%, copper: 1.65%, sulphur: 0.08%, chromium: 3.73%, barium: 0.07%, nickel: 5.21%, niobium: 0.37%, magnesium: 2.43%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 4mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.13%, manganese: 6.35%, gallium: 0.55%, rubidium: 0.33%, cadmium: 0.82%, germanium: 6.24%, vanadium: 2.17%, tungsten: 3.37%, copper: 0.65%, chromium: 15.78%, nickel: 12.7%, erbium: 2.43%, promethium: 3.55%, surplus is Fe and inevitable impurity.
The invention has the beneficial effects as follows: this steel plate not only intensity is high, resistance to corrosion and resistance of oxidation extremely strong, and the rub resistance ability on its surface improves greatly, reduce its wearing and tearing, increase its work-ing life, and thermal treatment process is provided, method is simple, and cost is low, effective; Titanium elements is added in its light plate, erosion resistance and intensity can be improved, add v element, energy crystal grain thinning in thermal treatment, can strengthen its intensity, toughness, anticorrosive, the wear-resisting and load that withstands shocks etc., add magnesium elements, energy crystal grain thinning and its superheated susceptivity of reduction and temper brittleness, improve intensity, resistant to hydrogen under weather-resistant and high temperature, nitrogen, ammonia corrosion can be improved, add chromium and micro-Ni element, its wear-resisting ability ability can be improved and increase its intensity, improve its fusing point, increase ability and the resistance of oxidation of high temperature resistance; Also scribble one deck admiro material at surface of steel plate, and add erbium, the promethium element in rare earth element, can in heat treatment process crystal grain thinning, form fine and close crystalline structure, increase intensity and the crocking resistance of steel plate,
And pass through thermal treatment process; first spray one deck powdered graphite on its surface, increase the rub resistance ability on its surface, not only surperficial beautiful; crocking resistance is strong; the work-ing life of steel plate can be increased, reduce costs, and pass into nitrogen as shielding gas and the cooling of employing nitrogen; the effect of crystal grain thinning can be played; prevent crackle and pore, increase intensity and the work-ing life of steel plate, improve its comprehensive mechanical performance.
Embodiment
embodiment 1
A kind of high tensile steel plate for light-duty mould shelf that the present embodiment provides, the composition of this steel plate and mass percent are: carbon: 0.43%, manganese: 0.63%, gallium: 0.74%, antimony: 0.42%, aluminium: 0.21%, germanium: 1.44%, vanadium: 1.82%, titanium: 2.76%, copper: 1.63%, sulphur: 0.07%, chromium: 3.72%, barium: 0.06%, nickel: 5.20%, niobium: 0.36%, magnesium: 2.42%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 3mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.12%, manganese: 6.32%, gallium: 0.54%, rubidium: 0.32%, cadmium: 0.81%, germanium: 6.23%, vanadium: 2.16%, tungsten: 3.36%, copper: 0.63%, chromium: 15.75%, nickel: 12.5%, erbium: 2.42%, promethium: 3.52%, surplus is Fe and inevitable impurity.
The present embodiment is also provided for the thermal treatment process of the high tensile steel plate of light-duty mould shelf, and concrete technology is as follows:
Step (1): the steel plate forged is heated to 1270 DEG C by high-frequency quenching stove, insulation 1h, then air cooling to 850 DEG C, adopt and to be air-cooledly combined with water-cooled, first adopt and air-cooledly with the rate of cooling of 7 DEG C/s, steel plate is cooled to 650 DEG C, adopt water-cooled, with the rate of cooling of 5 DEG C/s, steel plate is chilled to 340 DEG C, be then heated to 870 DEG C, insulation 50min, then air cooling is to room temperature;
Step (2): configuration corrosion resisting alloy coated powder, utilize spraying equipment to surface of steel plate even application 1mm alloy coat, then 880 DEG C are heated to, pass into nitrogen as shielding gas, keep 1h, then steel plate is adopted water-cooled, 550 DEG C are cooled to the speed of 10 DEG C/s, and then utilize spraying equipment to surface of steel plate even application 2mm alloy coat, then be heated to 930 DEG C, insulation 25min, adopts air-cooled, be cooled to 430 DEG C with the speed of 5 DEG C/s, then at air cooling to room temperature;
Step (2): surface of steel plate is evenly sprayed one deck powdered graphite, thickness is 0.6mm, is then heated to 350 DEG C, and insulation 35min, reheats to 780 DEG C, insulation 2h, and then adopt nitrogen cooling, be cooled to 320 DEG C with the speed of 6 DEG C/s, then air cooling is to room temperature;
Step (3): cleaning surface of steel plate, then air cooling is to room temperature.
embodiment 2
A kind of high tensile steel plate for light-duty mould shelf that the present embodiment provides, the composition of this steel plate and mass percent are: carbon: 0.45%, manganese: 0.65%, gallium: 0.76%, antimony: 0.44%, aluminium: 0.23%, germanium: 1.46%, vanadium: 1.84%, titanium: 2.79%, copper: 1.67%, sulphur: 0.09%, chromium: 3.75%, barium: 0.08%, nickel: 5.22%, niobium: 0.38%, magnesium: 2.44%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 5mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.14%, manganese: 6.38%, gallium: 0.56%, rubidium: 0.34%, cadmium: 0.83%, germanium: 6.25%, vanadium: 2.18%, tungsten: 3.39%, copper: 0.67%, chromium: 15.79%, nickel: 12.8%, erbium: 2.44%, promethium: 3.58%, surplus is Fe and inevitable impurity.
The present embodiment is also provided for the thermal treatment process of the high tensile steel plate of light-duty mould shelf, and concrete technology is as follows:
Step (1): the steel plate forged is heated to 1275 DEG C by high-frequency quenching stove, insulation 2h, then air cooling to 855 DEG C, adopt and to be air-cooledly combined with water-cooled, first adopt and air-cooledly with the rate of cooling of 9 DEG C/s, steel plate is cooled to 660 DEG C, adopt water-cooled, with the rate of cooling of 8 DEG C/s, steel plate is chilled to 350 DEG C, be then heated to 880 DEG C, insulation 55min, then air cooling is to room temperature;
Step (2): configuration corrosion resisting alloy coated powder, utilize spraying equipment to surface of steel plate even application 1mm alloy coat, then 890 DEG C are heated to, pass into nitrogen as shielding gas, keep 3h, then steel plate is adopted water-cooled, 560 DEG C are cooled to the speed of 12 DEG C/s, and then utilize spraying equipment to surface of steel plate even application 4mm alloy coat, then be heated to 940 DEG C, insulation 30min, adopts air-cooled, be cooled to 440 DEG C with the speed of 9 DEG C/s, then at air cooling to room temperature;
Step (2): surface of steel plate is evenly sprayed one deck powdered graphite, thickness is 0.8mm, is then heated to 360 DEG C, and insulation 40min, reheats to 790 DEG C, insulation 4h, and then adopt nitrogen cooling, be cooled to 330 DEG C with the speed of 7 DEG C/s, then air cooling is to room temperature;
Step (3): cleaning surface of steel plate, then air cooling is to room temperature.
embodiment 3
A kind of high tensile steel plate for light-duty mould shelf that the present embodiment provides, the composition of this steel plate and mass percent are: carbon: 0.44%, manganese: 0.64%, gallium: 0.75%, antimony: 0.43%, aluminium: 0.22%, germanium: 1.45%, vanadium: 1.83%, titanium: 2.77%, copper: 1.65%, sulphur: 0.08%, chromium: 3.73%, barium: 0.07%, nickel: 5.21%, niobium: 0.37%, magnesium: 2.43%, surplus is Fe and inevitable impurity;
The surface spraying of steel plate has corrosion resisting alloy coating, and the thickness of corrosion resisting alloy coating is 4mm, and the composition of corrosion resisting alloy coating and mass percent are;
Carbon: 0.13%, manganese: 6.35%, gallium: 0.55%, rubidium: 0.33%, cadmium: 0.82%, germanium: 6.24%, vanadium: 2.17%, tungsten: 3.37%, copper: 0.65%, chromium: 15.78%, nickel: 12.7%, erbium: 2.43%, promethium: 3.55%, surplus is Fe and inevitable impurity.
The present embodiment is also provided for the thermal treatment process of the high tensile steel plate of light-duty mould shelf, and concrete technology is as follows:
Step (1): the steel plate forged is heated to 1272 DEG C by high-frequency quenching stove, insulation 1.2h, then air cooling to 854 DEG C, adopt and to be air-cooledly combined with water-cooled, first adopt and air-cooledly with the rate of cooling of 8 DEG C/s, steel plate is cooled to 658 DEG C, adopt water-cooled, with the rate of cooling of 7 DEG C/s, steel plate is chilled to 346 DEG C, be then heated to 872 DEG C, insulation 53min, then air cooling is to room temperature;
Step (2): configuration corrosion resisting alloy coated powder, utilize spraying equipment to surface of steel plate even application 0.8mm alloy coat, then 884 DEG C are heated to, pass into nitrogen as shielding gas, keep 2h, then steel plate is adopted water-cooled, 558 DEG C are cooled to the speed of 11 DEG C/s, and then utilize spraying equipment to surface of steel plate even application 3.2mm alloy coat, then be heated to 937 DEG C, insulation 28min, adopts air-cooled, be cooled to 436 DEG C with the speed of 7 DEG C/s, then at air cooling to room temperature;
Step (2): surface of steel plate is evenly sprayed one deck powdered graphite, thickness is 0.7mm, is then heated to 356 DEG C, and insulation 38min, reheats to 786 DEG C, insulation 3h, and then adopt nitrogen cooling, be cooled to 326 DEG C with the speed of 7 DEG C/s, then air cooling is to room temperature;
Step (3): cleaning surface of steel plate, then air cooling is to room temperature.
The performance of each embodiment steel plate is as shown in table 1:
The performance of each embodiment steel plate of table 1
| Embodiment | Tensile strength, MPa | Yield strength, MPa | Unit elongation, % | Thickness direction relative reduction in area, % | -20 DEG C of Charpy-V impact powers, J | CLR, % | CTR, % | CSR,% | SSC |
| Embodiment 1 | 470 | 330 | 34 | 59.7 | 231 | 0 | 0 | 0 | Flawless |
| Embodiment 2 | 480 | 299 | 31 | 58.3 | 225 | 0 | 0 | 0 | Flawless |
| Embodiment 3 | 462 | 350 | 33 | 63.1 | 253 | 0 | 0 | 0 | Flawless |
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (5)
1. the high tensile steel plate for light-duty mould shelf, it is characterized in that: the composition of this steel plate and mass percent are: carbon: 0.43-0.45%, manganese: 0.63-0.65%, gallium: 0.74-0.76%, antimony: 0.42-0.44%, aluminium: 0.21-0.23%, germanium: 1.44-1.46%, vanadium: 1.82-1.84%, titanium: 2.76-2.79%, copper: 1.63-1.67%, sulphur: 0.07-0.09%, chromium: 3.72-3.75%, barium: 0.06-0.08%, nickel: 5.20-5.22%, niobium: 0.36-0.38%, magnesium: 2.42-2.44%, surplus is Fe and inevitable impurity;
The surface spraying of described steel plate has corrosion resisting alloy coating, and the thickness of described corrosion resisting alloy coating is 3-5mm, and composition and the mass percent of described corrosion resisting alloy coating are;
Carbon: 0.12-0.14%, manganese: 6.32-6.38%, gallium: 0.54-0.56%, rubidium: 0.32-0.34%, cadmium: 0.81-0.83%, germanium: 6.23-6.25%, vanadium: 2.16-2.18%, tungsten: 3.36-3.39%, copper: 0.63-0.67%, chromium: 15.75-15.79%, nickel: 12.5-12.8%, erbium: 2.42-2.44%, promethium: 3.52-3.58%, surplus is Fe and inevitable impurity.
2. the high tensile steel plate for light-duty mould shelf according to claim 1, is characterized in that: the composition of this steel plate and mass percent are: carbon: 0.43%, manganese: 0.63%, gallium: 0.74%, antimony: 0.42%, aluminium: 0.21%, germanium: 1.44%, vanadium: 1.82%, titanium: 2.76%, copper: 1.63%, sulphur: 0.07%, chromium: 3.72%, barium: 0.06%, nickel: 5.20%, niobium: 0.36%, magnesium: 2.42%, surplus is Fe and inevitable impurity;
The surface spraying of described steel plate has corrosion resisting alloy coating, and the thickness of described corrosion resisting alloy coating is 3mm, and composition and the mass percent of described corrosion resisting alloy coating are;
Carbon: 0.12%, manganese: 6.32%, gallium: 0.54%, rubidium: 0.32%, cadmium: 0.81%, germanium: 6.23%, vanadium: 2.16%, tungsten: 3.36%, copper: 0.63%, chromium: 15.75%, nickel: 12.5%, erbium: 2.42%, promethium: 3.52%, surplus is Fe and inevitable impurity.
3. the high tensile steel plate for light-duty mould shelf according to claim 1, is characterized in that: the composition of this steel plate and mass percent are: carbon: 0.45%, manganese: 0.65%, gallium: 0.76%, antimony: 0.44%, aluminium: 0.23%, germanium: 1.46%, vanadium: 1.84%, titanium: 2.79%, copper: 1.67%, sulphur: 0.09%, chromium: 3.75%, barium: 0.08%, nickel: 5.22%, niobium: 0.38%, magnesium: 2.44%, surplus is Fe and inevitable impurity;
The surface spraying of described steel plate has corrosion resisting alloy coating, and the thickness of described corrosion resisting alloy coating is 5mm, and composition and the mass percent of described corrosion resisting alloy coating are;
Carbon: 0.14%, manganese: 6.38%, gallium: 0.56%, rubidium: 0.34%, cadmium: 0.83%, germanium: 6.25%, vanadium: 2.18%, tungsten: 3.39%, copper: 0.67%, chromium: 15.79%, nickel: 12.8%, erbium: 2.44%, promethium: 3.58%, surplus is Fe and inevitable impurity.
4. the high tensile steel plate for light-duty mould shelf according to claim 1, is characterized in that: the composition of this steel plate and mass percent are: carbon: 0.44%, manganese: 0.64%, gallium: 0.75%, antimony: 0.43%, aluminium: 0.22%, germanium: 1.45%, vanadium: 1.83%, titanium: 2.77%, copper: 1.65%, sulphur: 0.08%, chromium: 3.73%, barium: 0.07%, nickel: 5.21%, niobium: 0.37%, magnesium: 2.43%, surplus is Fe and inevitable impurity;
The surface spraying of described steel plate has corrosion resisting alloy coating, and the thickness of described corrosion resisting alloy coating is 4mm, and composition and the mass percent of described corrosion resisting alloy coating are;
Carbon: 0.13%, manganese: 6.35%, gallium: 0.55%, rubidium: 0.33%, cadmium: 0.82%, germanium: 6.24%, vanadium: 2.17%, tungsten: 3.37%, copper: 0.65%, chromium: 15.78%, nickel: 12.7%, erbium: 2.43%, promethium: 3.55%, surplus is Fe and inevitable impurity.
5., for a thermal treatment process for the high tensile steel plate of light-duty mould shelf, it is characterized in that, concrete technology is as follows:
Step (1): the steel plate forged is heated to 1270-1275 DEG C by high-frequency quenching stove, insulation 1-2h, then air cooling is to 850-855 DEG C, adopt and to be air-cooledly combined with water-cooled, first adopt the air-cooled rate of cooling with 7-9 DEG C/s that steel plate is cooled to 650-660 DEG C, adopt water-cooled, with the rate of cooling of 5-8 DEG C/s, steel plate is chilled to 340-350 DEG C, be then heated to 870-880 DEG C, insulation 50-55min, then air cooling is to room temperature;
Step (2): configuration corrosion resisting alloy coated powder, utilize spraying equipment to surface of steel plate even application 0.5-1mm alloy coat, then 880-890 DEG C is heated to, pass into nitrogen as shielding gas, keep 1-3h, then steel plate is adopted water-cooled, 550-560 DEG C is cooled to the speed of 10-12 DEG C/s, and then utilize spraying equipment to surface of steel plate even application 0.5-4mm alloy coat, then be heated to 930-940 DEG C, insulation 25-30min, adopts air-cooled, be cooled to 430-440 DEG C with the speed of 5-9 DEG C/s, then at air cooling to room temperature;
Step (2): surface of steel plate is evenly sprayed one deck powdered graphite, thickness is 0.6-0.8mm, then 350-360 DEG C is heated to, insulation 35-40min, reheat to 780-790 DEG C, insulation 2-4h, then adopt nitrogen cooling, be cooled to 320-330 DEG C with the speed of 6-7 DEG C/s, then air cooling is to room temperature;
Step (3): cleaning surface of steel plate, then air cooling is to room temperature.
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