CN111015096A - Steel structure production and processing technology - Google Patents
Steel structure production and processing technology Download PDFInfo
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- CN111015096A CN111015096A CN201911202568.0A CN201911202568A CN111015096A CN 111015096 A CN111015096 A CN 111015096A CN 201911202568 A CN201911202568 A CN 201911202568A CN 111015096 A CN111015096 A CN 111015096A
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Abstract
The invention discloses a steel structure production and processing technology, which comprises the following steps: s1, detecting steel; s2, preprocessing steel; s3, performing rust removal, slag removal and oil removal treatment on the butt joint and the welding part, preheating the welding part of the steel by adopting a program heating method, welding the two welding joints by using a welding flux and a silicon-containing welding wire, and cooling to room temperature after welding to finish the welding operation; s4, soaking the welded workpieces into a functional treatment agent, soaking, taking out and washing with clear water until the pH value of washing water is neutral; s5, passivating and rinsing; and S6, assembling the workpieces according to the drawing, namely finishing the steel structure production and machining process. The processing technology provided by the invention is simple to operate and easy to industrialize, and the obtained steel structure has excellent antirust effect and a firm welding spot structure.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to a steel structure production and processing technology.
Background
Steel structures are structures composed of steel materials and are one of the main building structure types. The structure mainly comprises beam steel, steel columns, steel trusses and other members made of section steel, steel plates and the like, and rust removing and preventing processes such as silanization, pure manganese phosphating, washing drying, galvanization and the like are adopted. The components or parts are typically joined by welds, bolts or rivets. In recent years, the steel structure buildings gradually replace the status of concrete in the building field due to the advantages of less total steel consumption, good shock resistance, high installation speed, low manufacturing cost and the like compared with concrete structures, and are particularly suitable for being applied to the fields of large-scale plants, venues, super-high buildings and the like. Although the construction application of the steel structure is gradually increased, the steel structure still has a plurality of problems in the actual production process, such as the complexity of the rust removing and preventing method, the unsatisfactory rust preventing effect, the poor welding firmness and the like. Based on the defects in the prior art, the invention provides a steel structure production and processing technology.
Disclosure of Invention
The invention aims to solve the problems of complex rust removal and prevention process, unsatisfactory rust prevention effect and poor welding firmness in the existing processing process, and provides a steel structure production processing process.
A steel structure production and processing technology comprises the following steps:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within the range of 30mm on both sides of a butt joint and a welding part, preheating the welding part of steel by adopting a programmed heating method, welding the two welding joints by using a welding flux and a silicon-containing welding wire, wherein the welding current is 250-270A, the welding voltage is 35-45V, the welding speed is 6-8 m/h, carrying out first heat preservation treatment for 5-7 h on the welding part after welding, then reducing the temperature to 300 ℃ at the speed of 4-6 ℃/min, carrying out second heat preservation for 30min, then reducing the temperature to 230 ℃ at the speed of 2-3 ℃/min, carrying out third heat preservation for 20min, and then reducing the temperature to room temperature at the speed of 1 ℃/min, thus completing the welding operation;
s4, rust removal and prevention treatment: soaking the welded workpieces into a functional treatment agent completely, soaking for 90-120 min at 50-60 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and free of peculiar smell, and the rinsing time is 10-30 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
Preferably, in step S3, the specific procedure of the programmed temperature raising method is: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min.
Preferably, in the step S3, the preheating temperature is 220 to 260 ℃, and the preheating time is 10 to 20 min.
Preferably, in step S3, the temperature of the first heat-preserving treatment is 480 to 500 ℃.
Preferably, in step S4, the functional treatment agent comprises the following raw materials in parts by weight: 2.4-4.6 parts of polyvinyl alcohol, 4.5-6.5 parts of pentaerythritol, 3.8-6.2 parts of acetyl triethyl citrate, 0.2-0.4 part of nonionic polyacrylamide, 1.4-2.8 parts of nano zinc oxide, 0.024-0.032 part of hydrolytic polymaleic anhydride, 0.03-0.05 part of N-methyl pyrrolidone, 200-220 parts of water and 10-16 parts of glycerol.
Preferably, the functional treatment agent is prepared by the following method: firstly, uniformly mixing water and glycerol, adding N-methyl pyrrolidone, stirring until the N-methyl pyrrolidone is completely dissolved, heating to 40-45 ℃, sequentially adding hydrolyzed polymaleic anhydride, polyvinyl alcohol, pentaerythritol, acetyl triethyl citrate, nonionic polyacrylamide and nano zinc oxide, stirring for 20-30 min, and naturally cooling to room temperature to obtain the functional treating agent.
Compared with the prior art, the invention has the beneficial effects that:
the processing technology provided by the invention is simple to operate and easy to industrialize, after conventional processing of detection, material selection, cutting and polishing, the welding position of steel is preheated by adopting a program inquiry mode, welding is carried out according to reasonable welding parameters, the stability and firmness of the welding point of the steel can be ensured, meanwhile, the welding operation is convenient to carry out, and the mechanical property of the welding point can be closer to that of the steel on two sides of the welding point according to the operation modes of program cooling and heat preservation on the welding position of a workpiece after the welding is finished, so that the phenomena of welding point falling and disconnection caused by different stresses in the reusing process are avoided. In addition, the method uses the functional treatment agent with reasonable proportion to carry out rust removal and rust prevention treatment on the welded bow and arrow, compared with the traditional steel structure rust removal and rust prevention mode, the mode provided by the invention is more convenient to operate, the production and processing process is simpler, and tests prove that the effect achieved by the rust removal and rust prevention method provided by the invention is more ideal, and the firmness of welding spots cannot be weakened in the rust removal and rust prevention process.
Detailed Description
The present invention will be further illustrated with reference to the following specific examples.
Example 1
The invention provides a steel structure production and processing technology, which comprises the following steps:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within the range of 30mm on both sides of a butt joint and a welding part, and then preheating the welding part of steel by adopting a programmed heating method, wherein the preheating temperature is 220 ℃, the preheating time is 20min, and the specific program of the programmed heating method is as follows: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min; welding two welding heads by using a welding flux and a silicon-containing welding wire, wherein the welding current is 250A, the welding voltage is 35V, the welding speed is 6m/h, the welding position is subjected to first heat preservation treatment for 7h after welding, the temperature of the first heat preservation treatment is 500 ℃, then the temperature is reduced to 300 ℃ at the speed of 4 ℃/min, the second heat preservation is carried out for 30min, then the temperature is reduced to 230 ℃ at the speed of 2 ℃/min, the third heat preservation is carried out for 20min, and then the temperature is reduced to room temperature at the speed of 1 ℃/min, so that the welding operation is finished;
s4, rust removal and prevention treatment: soaking the welded workpiece into a functional treatment agent completely, soaking for 120min at 50 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
the functional treatment agent comprises the following raw materials in parts by weight: 2.4 parts of polyvinyl alcohol, 6.5 parts of pentaerythritol, 3.8 parts of acetyl triethyl citrate, 0.4 part of nonionic polyacrylamide, 1.4 parts of nano zinc oxide, 0.032 part of hydrolytic polymaleic anhydride, 0.03 part of N-methyl pyrrolidone, 220 parts of water and 10 parts of glycerol; the functional treatment agent is prepared by the following method: uniformly mixing water and glycerol, adding N-methyl pyrrolidone, stirring until the N-methyl pyrrolidone is completely dissolved, heating to 45 ℃, sequentially adding hydrolyzed polymaleic anhydride, polyvinyl alcohol, pentaerythritol, acetyl triethyl citrate, nonionic polyacrylamide and nano zinc oxide, stirring for 30min, and naturally cooling to room temperature to obtain the functional treating agent;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and has no peculiar smell, and the rinsing time is 30 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
Example 2
The invention provides a steel structure production and processing technology, which comprises the following steps:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within 30mm of each of two sides of a butt joint and a welding part, and then preheating the welding part of steel by adopting a programmed heating method, wherein the preheating temperature is 240 ℃, the preheating time is 15min, and the specific program of the programmed heating method is as follows: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min; welding two welding heads by using a welding flux and a silicon-containing welding wire, wherein the welding current is 260A, the welding voltage is 40V, the welding speed is 7m/h, the welding position is subjected to first heat preservation treatment for 6h after welding, the temperature of the first heat preservation treatment is 490 ℃, then the temperature is reduced to 300 ℃ at the speed of 5 ℃/min, the second heat preservation is carried out for 30min, then the temperature is reduced to 230 ℃ at the speed of 3 ℃/min, the third heat preservation is carried out for 20min, and then the temperature is reduced to room temperature at the speed of 1 ℃/min, so that the welding operation is finished;
s4, rust removal and prevention treatment: soaking the welded workpiece into a functional treatment agent completely, soaking for 100min at 55 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
the functional treatment agent comprises the following raw materials in parts by weight: 3.5 parts of polyvinyl alcohol, 5.5 parts of pentaerythritol, 5.4 parts of acetyl triethyl citrate, 0.3 part of nonionic polyacrylamide, 2 parts of nano zinc oxide, 0.028 part of hydrolyzed polymaleic anhydride, 0.04 part of N-methyl pyrrolidone, 210 parts of water and 13 parts of glycerol; the functional treatment agent is prepared by the following method: uniformly mixing water and glycerol, adding N-methyl pyrrolidone, stirring until the N-methyl pyrrolidone is completely dissolved, heating to 40 ℃, sequentially adding hydrolyzed polymaleic anhydride, polyvinyl alcohol, pentaerythritol, acetyl triethyl citrate, nonionic polyacrylamide and nano zinc oxide, stirring for 30min, and naturally cooling to room temperature to obtain the functional treating agent;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and has no peculiar smell, and the rinsing time is 20 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
Example 3
The invention provides a steel structure production and processing technology, which comprises the following steps:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within the range of 30mm on both sides of a butt joint and a welding part, and then preheating the welding part of steel by adopting a programmed heating method, wherein the preheating temperature is 260 ℃, the preheating time is 10min, and the specific program of the programmed heating method is as follows: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min; welding two welding heads by using a welding flux and a silicon-containing welding wire, wherein the welding current is 270A, the welding voltage is 45V, the welding speed is 8m/h, after welding, the welding position is firstly subjected to first heat preservation treatment for 5h, the temperature of the first heat preservation treatment is 480 ℃, then the temperature is reduced to 300 ℃ at the speed of 6 ℃/min, the second heat preservation is carried out for 30min, then the temperature is reduced to 230 ℃ at the speed of 3 ℃/min, the third heat preservation is carried out for 20min, and then the temperature is reduced to room temperature at the speed of 1 ℃/min, so that the welding operation is finished;
s4, rust removal and prevention treatment: soaking the welded workpiece into the functional treatment agent completely, soaking for 90min at 60 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
the functional treatment agent comprises the following raw materials in parts by weight: 4.6 parts of polyvinyl alcohol, 4.5 parts of pentaerythritol, 6.2 parts of acetyl triethyl citrate, 0.2 part of nonionic polyacrylamide, 2.8 parts of nano zinc oxide, 0.024 part of hydrolytic polymaleic anhydride, 0.05 part of N-methyl pyrrolidone, 200 parts of water and 16 parts of glycerol; the functional treatment agent is prepared by the following method: uniformly mixing water and glycerol, adding N-methyl pyrrolidone, stirring until the N-methyl pyrrolidone is completely dissolved, heating to 45 ℃, sequentially adding hydrolyzed polymaleic anhydride, polyvinyl alcohol, pentaerythritol, acetyl triethyl citrate, nonionic polyacrylamide and nano zinc oxide, stirring for 20min, and naturally cooling to room temperature to obtain the functional treating agent;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and has no peculiar smell, and the rinsing time is 10 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
Comparative example 1
The invention provides a steel structure production and processing technology, which comprises the following steps:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within 30mm of each of two sides of a butt joint and a welding part, and then preheating the welding part of steel by adopting a programmed heating method, wherein the preheating temperature is 240 ℃, the preheating time is 15min, and the specific program of the programmed heating method is as follows: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min; welding two welding heads by using a welding flux and a silicon-containing welding wire, wherein the welding current is 260A, the welding voltage is 40V, the welding speed is 7m/h, the welding position is subjected to first heat preservation treatment for 6h after welding, the temperature of the first heat preservation treatment is 490 ℃, then the temperature is reduced to 300 ℃ at the speed of 5 ℃/min, the second heat preservation is carried out for 30min, then the temperature is reduced to 230 ℃ at the speed of 3 ℃/min, the third heat preservation is carried out for 20min, and then the temperature is reduced to room temperature at the speed of 1 ℃/min, so that the welding operation is finished;
s4, rust removal and prevention treatment: soaking the welded workpiece into a functional treatment agent completely, soaking for 100min at 55 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
the functional treatment agent comprises the following raw materials in parts by weight: 210 parts of water and 13 parts of glycerol; the functional treatment agent is prepared by the following method: mixing water and glycerol uniformly to obtain a functional treating agent;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and has no peculiar smell, and the rinsing time is 20 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
The processing technology of the embodiments 1 to 3 and the comparative example 1 is utilized to process the same batch of steel to produce the steel structure, the steel structure is placed in a constant temperature and humidity box, the humidity is 70 percent, the temperature is 60 ℃, the phenomena after the steel structure is placed for 100 days, 110 days and 120 days are observed, and the results are as follows:
| example 1 | Example 2 | Example 3 | Comparative example 1 | |
| Phenomenon after standing for 100 days | Without white spots | Without white spots | Without white spots | Large number of white spots |
| The phenomenon after standing for 110 days | Without white spots | Without white spots | Without white spots | Large number of white spots |
| Phenomenon after 120 days of storage | Without white spots | Without white spots | A small amount of white spots | Large number of white spots |
The test result shows that compared with the comparative example, the steel structure obtained by the processing technology of the embodiments 1-3 of the invention has more excellent antirust performance.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. The production and processing technology for the steel structure is characterized by comprising the following steps of:
s1, detection of steel materials: detecting the basic steel of the steel structure, judging whether the steel meets the requirements of the current national or industrial standard, if so, sending the steel to a pretreatment area for pretreatment, and if not, directly sending the steel to a material returning area;
s2, pretreatment of steel: selecting steel with corresponding size according to the requirements of a steel structure drawing, cutting and polishing to obtain pretreated steel;
s3, welding: carrying out rust removal, slag removal and oil removal treatment within the range of 30mm on both sides of a butt joint and a welding part, preheating the welding part of steel by adopting a programmed heating method, welding the two welding joints by using a welding flux and a silicon-containing welding wire, wherein the welding current is 250-270A, the welding voltage is 35-45V, the welding speed is 6-8 m/h, carrying out first heat preservation treatment for 5-7 h on the welding part after welding, then reducing the temperature to 300 ℃ at the speed of 4-6 ℃/min, carrying out second heat preservation for 30min, then reducing the temperature to 230 ℃ at the speed of 2-3 ℃/min, carrying out third heat preservation for 20min, and then reducing the temperature to room temperature at the speed of 1 ℃/min, thus completing the welding operation;
s4, rust removal and prevention treatment: soaking the welded workpieces into a functional treatment agent completely, soaking for 90-120 min at 50-60 ℃, taking out, and washing with clear water until the pH value of washing water is neutral;
s5, passivation treatment and rinsing: passivating the workpiece treated in the step S4 in a passivation solution, wherein during passivation, the plated workpiece is moved in a serial mode for at least 1 time, the obtained passivation film is normal in bright yellow, and the passivation film cannot be wiped off by fingers and serves as a test standard; rinsing the passivated workpiece, wherein the rinsing water temperature is not higher than 50 ℃, the rinsing water is clear and free of peculiar smell, and the rinsing time is 10-30 s;
s6, assembling: and (5) assembling the workpieces processed in the step S6 according to a drawing, namely finishing the steel structure production and machining process.
2. The steel structure production and processing technology of claim 1, wherein in the step S3, the specific procedure of the programmed heating method is as follows: heating at a speed of 2 ℃/min for 0-3 min, heating at a speed of 4 ℃/min for 3.01-6 min, heating at a speed of 6 ℃/min for 6.01-12 min, and heating to the temperature required for preheating at a speed of 10 ℃/min after 6.01 min.
3. The steel structure production processing technology of claim 1, wherein in the step S3, the preheating temperature is 220-260 ℃, and the preheating time is 10-20 min.
4. The steel structure production and processing technology of claim 1, wherein in the step S3, the temperature of the first heat preservation treatment is 480-500 ℃.
5. The steel structure production and processing technology of claim 1, wherein in the step S4, the functional treatment agent comprises the following raw materials in parts by weight: 2.4-4.6 parts of polyvinyl alcohol, 4.5-6.5 parts of pentaerythritol, 3.8-6.2 parts of acetyl triethyl citrate, 0.2-0.4 part of nonionic polyacrylamide, 1.4-2.8 parts of nano zinc oxide, 0.024-0.032 part of hydrolytic polymaleic anhydride, 0.03-0.05 part of N-methyl pyrrolidone, 200-220 parts of water and 10-16 parts of glycerol.
6. The steel structure production and processing technology as claimed in claim 5, wherein the functional treatment agent is prepared by the following method: firstly, uniformly mixing water and glycerol, adding N-methyl pyrrolidone, stirring until the N-methyl pyrrolidone is completely dissolved, heating to 40-45 ℃, sequentially adding hydrolyzed polymaleic anhydride, polyvinyl alcohol, pentaerythritol, acetyl triethyl citrate, nonionic polyacrylamide and nano zinc oxide, stirring for 20-30 min, and naturally cooling to room temperature to obtain the functional treating agent.
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| CN107299338A (en) * | 2017-07-09 | 2017-10-27 | 无锡市福吉电子科技有限公司 | A kind of steelwork aqueous, environmental protective antirust agent and its preparation method and application |
| CN109079438A (en) * | 2018-08-17 | 2018-12-25 | 云南宏盛铁塔实业有限公司 | A kind of steel structure processing technology |
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