CN104862576A - Treatment process for stainless steel profile for photovoltaic panel bracket - Google Patents
Treatment process for stainless steel profile for photovoltaic panel bracket Download PDFInfo
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- CN104862576A CN104862576A CN201510294476.5A CN201510294476A CN104862576A CN 104862576 A CN104862576 A CN 104862576A CN 201510294476 A CN201510294476 A CN 201510294476A CN 104862576 A CN104862576 A CN 104862576A
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Abstract
The invention discloses a treatment process for a stainless steel profile for a photovoltaic panel bracket. The treatment process for the stainless steel profile for the photovoltaic panel bracket comprises the following steps: feeding selected S316 martensitic stainless steel into an electric heating furnace, preheating, melting and performing heat preservation, feeding rare earth elements into the furnace, introducing high-purity Ar into the electric heating furnace in the whole feeding process, performing vacuum degassing and Ar-protected die casting, acid-washing a casting with hydrochloric acid, performing galvanizing and coating treatment, and finally performing curing in a drying oven. According to the treatment process for the stainless steel profile for the photovoltaic panel bracket, the treated profile is endowed with high structure properties, and carbide in die steel can be well controlled to substantially exist in form of M3C, so that the S316 martensitic stainless steel has high mechanical properties and corrosion resistance; in addition, the steps of the process are simple, and energy resources are effectively saved.
Description
Technical field
The present invention relates to a kind of manufacturing technology field of photovoltaic apparatus, particularly a kind for the treatment of process of photovoltaic panel support bar section of stainless steel.
Background technology
The polymer plastic materials such as polyvinyl chloride, fire retardant ABS can decomposite the harmful elements such as Cl in forming process, have stronger corrodibility, cause the inefficacy such as spot corrosion, stress corrosion to mold cavity, then reduce die life and finished surface quality.The method such as molecular dynamics, first principle is adopted from micro-scale, calculate iron carbon clusters and can reduce absorption to chlorion under the adding of Cr element, the carbide all not easily adsorbing chloride ions of also namely common M23C6, M3C two kinds of configurations, but M23C6 carbide can cause its surrounding matrix " poor chromium ", thus causes spot corrosion; M3C carbide then can not cause too large impact to " poor chromium ".
In prior art, the U.S., Japan and other countries, the photovoltaic panel support of more than 80% adopts external galvanized layer internal plastic coating technique; At present, some designing institute domestic when Building Engineering Design also the direct requirement by external galvanized layer internal plastic coating photovoltaic panel support clearly write in design, photovoltaic panel rack outer surface is zinc-plated, not only make cost reduce, and maintain that hot dip galvanizing pipe is convenient to hitch, installation, transport, is resistance toly collided with, the premium properties such as mechanical resistant wearing and tearing, outside surface are attractive in appearance.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of prior art, provides a kind for the treatment of process of photovoltaic panel support bar section of stainless steel.
In order to solve above technical problem, the invention provides a kind for the treatment of process of photovoltaic panel support bar section of stainless steel, comprising following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 300-360 DEG C/h, then be heated to treatment temp 1560-1580 DEG C with the temperature rise rate of 120-150 DEG C/h, the soaking time of stainless steel liquation is 1.5-2h;
in stove, rare earth element is dropped at 1560-1580 DEG C, the input amount of rare earth element is the 1.1-1.125% of above-mentioned stainless steel liquation quality, after stirring, insulation 1-2h, again drop into the rare earth element of equal in quality, soaking time is 2-3h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 60-80MPa;
furnace temperature is down to 1490-1500 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 60-80MPa; At 1490-1500 DEG C, carry out vacuum outgas, vacuum tightness 45-48 handkerchief, pumpdown time is at 4-7h;
In rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1410-1430 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 560-580 DEG C, soaking time is 48-60h, carries out quench treatment subsequently, with the speed of cooling of 0.8-1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, time 30-90 minute, cleans up foundry goods with clear water subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 50-80 DEG C, the preheating again of foundry goods after water-cooled, temperature is 200 DEG C-250 DEG C, plastic-coated after preheating 25-35min, the baking oven that pipe fitting after plastic-coated is placed in 160-200 DEG C solidifies 25-35min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel.
Technique effect: galvanized pipe plastic coating process of the present invention can type surface and powder coating between sticking power, boil in the hot water of 105 DEG C ± 3 DEG C in the hot water of 24h or 95 DEG C ± 3 DEG C and boil 48h, the sticking power between Surface of profile and powder Xu layer can reach≤the requirement of 3 grades; Section bar after process of the present invention has excellent structure property, can control carbide well, carbide in die steel is existed with the form of M3C substantially, thus makes S316 Martensite Stainless Steel have excellent mechanical property and corrosion resistance nature concurrently; Particularly preferred solid solution temperature, soaking time and processing pressure, make S316 obtain outstanding corrosion resistance nature;
Present invention process step is simple simultaneously, effective save energy.
The technical scheme that the present invention limits further is:
Further, the treatment process of aforesaid photovoltaic panel support bar section of stainless steel, comprises following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 360 DEG C/h, then be heated to treatment temp 1560 DEG C with the temperature rise rate of 125 DEG C/h, the soaking time of stainless steel liquation is 1.5h;
in stove, rare earth element is dropped at 1560 DEG C, the input amount of rare earth element is 1.125% of above-mentioned stainless steel liquation quality, after stirring, insulation 2h, again drop into the rare earth element of equal in quality, soaking time is 2h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 65MPa;
furnace temperature is down to 1500 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 65MPa; At 1500 DEG C, carry out vacuum outgas, vacuum tightness 45-48 handkerchief, pumpdown time is at 4-7h;
In rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1420 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 560 DEG C, soaking time is 55h, carries out quench treatment subsequently, with the speed of cooling of 0.8-1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, 65 minutes time, with clear water, foundry goods is cleaned up subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 65 DEG C, the preheating again of foundry goods after water-cooled, temperature is 225 DEG C, plastic-coated after preheating 30min, the baking oven that pipe fitting after plastic-coated is placed in 165 DEG C solidifies 30min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel.
The treatment process of aforesaid photovoltaic panel support bar section of stainless steel, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 30-60 part, hardener dose accounts for 18-30 part, pigment and amount of filler account for 20-30 part, auxiliary dosage accounts for 2-12 part, and the mass ratio of pigment and filler is 4.5:1;
Thermosetting resin is epoxy resin, and epoxy resin is bisphenol A type epoxy resin, the one in novolac epoxy; Auxiliary agent is flow agent, air release agent, fluffy powder, curing catalyst, antioxidant, one or more in defoamer; Filler is ceramic fine bead, glass microballon, mica powder, the combination of one or more in aluminium powder, silicon-dioxide, barium sulfate; Pigment is red iron oxide or chrome red.
The treatment process of aforesaid photovoltaic panel support bar section of stainless steel, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 55 parts, and hardener dose accounts for 26 parts, pigment and filler totally 25 parts, auxiliary dosage accounts for 6 parts, and the mass ratio of pigment and filler is 4.5:1.
Embodiment
embodiment 1
The treatment process of a kind of photovoltaic panel support bar section of stainless steel that the present embodiment provides, comprises following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 300 DEG C/h, then be heated to treatment temp 1560 DEG C with the temperature rise rate of 150 DEG C/h, the soaking time of stainless steel liquation is 2h;
in stove, rare earth element is dropped at 1560 DEG C, the input amount of rare earth element is 1.1% of above-mentioned stainless steel liquation quality, after stirring, insulation 2h, again drop into the rare earth element of equal in quality, soaking time is 2h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 80MPa;
furnace temperature is down to 1490 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 80MPa; At 1490 DEG C, carry out vacuum outgas, vacuum tightness 48 handkerchief, pumpdown time is at 4h;
In rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1410 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 580 DEG C, soaking time is 48h, carries out quench treatment subsequently, with the speed of cooling of 1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, 56 minutes time, with clear water, foundry goods is cleaned up subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 75 DEG C, the preheating again of foundry goods after water-cooled, temperature is 225 DEG C, plastic-coated after preheating 28min, the baking oven that pipe fitting after plastic-coated is placed in 165 DEG C solidifies 28min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel;
The treatment process of aforesaid photovoltaic panel support bar section of stainless steel, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 30-60 part, hardener dose accounts for 18-30 part, pigment and amount of filler account for 20-30 part, auxiliary dosage accounts for 2-12 part, and the mass ratio of pigment and filler is 4.5:1;
Thermosetting resin is bisphenol A type epoxy resin; Auxiliary agent is flow agent, air release agent, fluffy powder and curing catalyst; Filler is ceramic fine bead, glass microballon and mica powder; Pigment is red iron oxide or chrome red; Plastic-coated powder coating used comprises by mass percentage: thermosetting resin 55 parts, and hardener dose accounts for 26 parts, pigment and filler totally 25 parts, and auxiliary dosage accounts for 6 parts, and the mass ratio of pigment and filler is 4.5:1.
embodiment 2
The treatment process of a kind of photovoltaic panel support bar section of stainless steel that the present embodiment provides, comprises following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 360 DEG C/h, then be heated to treatment temp 1560 DEG C with the temperature rise rate of 125 DEG C/h, the soaking time of stainless steel liquation is 1.5h;
in stove, rare earth element is dropped at 1560 DEG C, the input amount of rare earth element is 1.125% of above-mentioned stainless steel liquation quality, after stirring, insulation 2h, again drop into the rare earth element of equal in quality, soaking time is 2h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 65MPa;
furnace temperature is down to 1500 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 65MPa; At 1500 DEG C, carry out vacuum outgas, vacuum tightness 45-48 handkerchief, pumpdown time is at 4-7h;
In rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1420 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 560 DEG C, soaking time is 55h, carries out quench treatment subsequently, with the speed of cooling of 0.8-1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, 65 minutes time, with clear water, foundry goods is cleaned up subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 65 DEG C, the preheating again of foundry goods after water-cooled, temperature is 225 DEG C, plastic-coated after preheating 30min, the baking oven that pipe fitting after plastic-coated is placed in 165 DEG C solidifies 30min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel;
The treatment process of aforesaid photovoltaic panel support bar section of stainless steel, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 30-60 part, hardener dose accounts for 18-30 part, pigment and amount of filler account for 20-30 part, auxiliary dosage accounts for 2-12 part, and the mass ratio of pigment and filler is 4.5:1;
Thermosetting resin is novolac epoxy; Auxiliary agent is curing catalyst, antioxidant and defoamer; Filler is aluminium powder, silicon-dioxide and barium sulfate; Pigment is red iron oxide or chrome red; Plastic-coated powder coating used comprises by mass percentage: thermosetting resin 55 parts, and hardener dose accounts for 26 parts, pigment and filler totally 25 parts, and auxiliary dosage accounts for 6 parts, and the mass ratio of pigment and filler is 4.5:1.
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 (4)
1. a treatment process for photovoltaic panel support bar section of stainless steel, is characterized in that, comprises following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 300-360 DEG C/h, then be heated to treatment temp 1560-1580 DEG C with the temperature rise rate of 120-150 DEG C/h, the soaking time of stainless steel liquation is 1.5-2h;
in stove, rare earth element is dropped at 1560-1580 DEG C, the input amount of described rare earth element is the 1.1-1.125% of above-mentioned stainless steel liquation quality, after stirring, insulation 1-2h, again drop into the rare earth element of equal in quality, soaking time is 2-3h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 60-80MPa;
furnace temperature is down to 1490-1500 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 60-80MPa; At 1490-1500 DEG C, carry out vacuum outgas, vacuum tightness 45-48 handkerchief, pumpdown time is at 4-7h;
In described rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1410-1430 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 560-580 DEG C, soaking time is 48-60h, carries out quench treatment subsequently, with the speed of cooling of 0.8-1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, time 30-90 minute, cleans up foundry goods with clear water subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 50-80 DEG C, the preheating again of foundry goods after water-cooled, temperature is 200 DEG C-250 DEG C, plastic-coated after preheating 25-35min, the baking oven that pipe fitting after plastic-coated is placed in 160-200 DEG C solidifies 25-35min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel.
2. the treatment process of photovoltaic panel support bar section of stainless steel according to claim 1, is characterized in that, comprise following concrete steps:
choose S316 Martensite Stainless Steel to drop in electrothermal oven, be first warming up to 250 DEG C of preheatings with the temperature rise rate of 360 DEG C/h, then be heated to treatment temp 1560 DEG C with the temperature rise rate of 125 DEG C/h, the soaking time of stainless steel liquation is 1.5h;
in stove, rare earth element is dropped at 1560 DEG C, the input amount of described rare earth element is 1.125% of above-mentioned stainless steel liquation quality, after stirring, insulation 2h, again drop into the rare earth element of equal in quality, soaking time is 2h, and drop into rare earth element whole process and pass into high-purity Ar gas in electrothermal oven, the pressure that passes into of Ar is 65MPa;
furnace temperature is down to 1500 DEG C, passes into high-purity Ar gas in electrothermal oven, and the pressure that passes into of Ar is 65MPa; At 1500 DEG C, carry out vacuum outgas, vacuum tightness 45-48 handkerchief, pumpdown time is at 4-7h;
In described rare earth, comprise following component by weight percentage: Gd:15-18%, Pr:3-5%, Dy:7-9%, Ac:12.5-12.8%, Nd:15-20%, Sm:11-13%, surplus is La;
at the temperature of 1420 DEG C, carry out argon shield die casting, after solidifying, temperature is remained on 560 DEG C, soaking time is 55h, carries out quench treatment subsequently, with the speed of cooling of 0.8-1.0 DEG C/s, is cooled to rapidly less than 220 DEG C; Rapid subsequently the salt bath processing environment that the foundry goods after quenching inserts 330 DEG C is heated and is incubated 3h, carrying out temper subsequently and with the speed water-cooled of 25 DEG C/sec to room temperature;
adopt chlorohydric acid pickling foundry goods, 65 minutes time, with clear water, foundry goods is cleaned up subsequently; With pH test paper test foundry goods, ensure that pH value is in the scope of 6-8; Foundry goods is all immersed in the plating assistant agent containing zinc chloride and ammonium chloride, until foundry goods does not emit bubble in plating assistant agent, hang out workpiece and evacuation plating assistant agent, the foundry goods of cleaning is immersed in zinc bath, makes foundry goods and fused zinc react the epithelium of generation one alloying;
after foundry goods hangs out zinc pond, first cool in atmosphere, and then put into water and cool, cooling pool water temp remains on 65 DEG C, the preheating again of foundry goods after water-cooled, temperature is 225 DEG C, plastic-coated after preheating 30min, the baking oven that pipe fitting after plastic-coated is placed in 165 DEG C solidifies 30min, namely completes the treatment process of photovoltaic panel support bar section of stainless steel.
3. the treatment process of photovoltaic panel support bar section of stainless steel according to claim 1 and 2, it is characterized in that, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 30-60 part, hardener dose accounts for 18-30 part, pigment and amount of filler account for 20-30 part, auxiliary dosage accounts for 2-12 part, and the mass ratio of pigment and filler is 4.5:1;
Described thermosetting resin is epoxy resin, and described epoxy resin is bisphenol A type epoxy resin, the one in novolac epoxy; Described auxiliary agent is flow agent, air release agent, fluffy powder, curing catalyst, antioxidant, one or more in defoamer; Described filler is ceramic fine bead, glass microballon, mica powder, the combination of one or more in aluminium powder, silicon-dioxide, barium sulfate; Described pigment is red iron oxide or chrome red.
4. the treatment process of photovoltaic panel support bar section of stainless steel according to claim 3, it is characterized in that, plastic-coated powder coating used comprises by mass percentage: thermosetting resin 55 parts, hardener dose accounts for 26 parts, pigment and filler totally 25 parts, auxiliary dosage accounts for 6 parts, and the mass ratio of pigment and filler is 4.5:1.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171384A (en) * | 1990-10-16 | 1992-12-15 | Nisshin Steel Co., Ltd. | Process for producing high strength stainless steel strip excellent in shape |
| CN102101966A (en) * | 2009-12-16 | 2011-06-22 | 上海船舶工艺研究所 | Powder paint for plastic coating of firefighting pipelines and manufacturing method thereof |
| CN104342603A (en) * | 2014-10-21 | 2015-02-11 | 大丰市南亚阀门有限公司 | Alloy material for improving corrosion resistance of valve and treatment process thereof |
| CN104561479A (en) * | 2015-01-22 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Heat treatment process of S316 martensitic stainless steel |
| CN104561876A (en) * | 2014-12-30 | 2015-04-29 | 广东运通热镀锌厂有限公司 | Hot galvanizing technical method |
-
2015
- 2015-06-02 CN CN201510294476.5A patent/CN104862576A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5171384A (en) * | 1990-10-16 | 1992-12-15 | Nisshin Steel Co., Ltd. | Process for producing high strength stainless steel strip excellent in shape |
| CN102101966A (en) * | 2009-12-16 | 2011-06-22 | 上海船舶工艺研究所 | Powder paint for plastic coating of firefighting pipelines and manufacturing method thereof |
| CN104342603A (en) * | 2014-10-21 | 2015-02-11 | 大丰市南亚阀门有限公司 | Alloy material for improving corrosion resistance of valve and treatment process thereof |
| CN104561876A (en) * | 2014-12-30 | 2015-04-29 | 广东运通热镀锌厂有限公司 | Hot galvanizing technical method |
| CN104561479A (en) * | 2015-01-22 | 2015-04-29 | 机械科学研究总院先进制造技术研究中心 | Heat treatment process of S316 martensitic stainless steel |
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