CN101176942A - Method for welding OCr13Ni5Mo low-carbon martensitic stainless steel - Google Patents
Method for welding OCr13Ni5Mo low-carbon martensitic stainless steel Download PDFInfo
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- CN101176942A CN101176942A CNA2007101586621A CN200710158662A CN101176942A CN 101176942 A CN101176942 A CN 101176942A CN A2007101586621 A CNA2007101586621 A CN A2007101586621A CN 200710158662 A CN200710158662 A CN 200710158662A CN 101176942 A CN101176942 A CN 101176942A
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Abstract
The invention relates to a welding method for 0Cr13Ni5Mo mild martensite stainless steel, belonging to the technical field of mild martensite stainless steel welding, which comprises the following steps: welding process control for strictly controlling the grooves gouged by the carbon arc air gouging, the dressing quality after the back chipping, the preheating temperature between 80 and 100 DEG C before welding, the interlayer-temperature below 150 to 200 DEG C and the slow cooling after welding; protective gas control for protective gas matching: the volume percents of the mixed gas is 94 to 96% of Ar and 6 to 4% of CO2; the protective gas flow is controlled between 15 to 22 L/min; the weight percents of the welding wire are 0.013 to 0.015 of C, 0.54 to 0.56 of Si, 0.73 to 0.75 of Mn, than or equal to 0.020 of P, less than or equal to 0.004 of S, 4.90 to 5.50 of Ni, 13.25 to 13.35 of Cr and 0.45 to 0.53 of Mo. By the strict process control, the invention has the advantages of effectively avoiding the cool and hot welding crack defects caused by the high carbon content of the welding line and high or low preheating temperature, so as to increase the one-time qualified rate of the UT welding fault detecting from less 50% to above 80%.
Description
Technical field
The present invention relates to the Low Carbon Martensite Stainless Steel welding technology field, particularly a kind of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method.
Background technology
Martensitic stain less steel is not the welding steel kind of using always, and weldability is relatively poor, and stronger crackle tendency is arranged, and welding quality is difficult to guarantee, can cause bigger welding deformation and reprocess because of weld seam, repairs difficulty.Bamboo is drawn the complex structure of blue martensitic stain less steel runner envelope, required precision height, the formed precision of the spherical liner plate of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel wherein and the key point that welding quality is this production.Even the professional manufactory of present hydroelectric facility, in manufacturing process, the welding quality that yet exists in various degree because of the spherical liner plate of martensitic stain less steel does not pass a test, weld seam is reprocessed in a large number and is caused globe lining sheet metal forming low precision, so that after the runner envelope integral solder, the correction of the flank shape difficulty, the problem that the product size tolerance is overproof.The welding of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel in theory, can adopt the HS13/5L welding wire, but during in fact welding experiment and initial stage welding are put into practice before making, through weld seam 100%UT defect detecting test, find qualification rate less than 50%, there are defectives such as in various degree pore, slag inclusion, crackle, especially reparation in the majority and difficult with crack defect.By repetition test with constantly discover; Control Welding Process such as the polishing before the welding butt welding of this steel grade behind preheat temperature, interlayer temperature, groove and the back chipping, postheating and protective gas composition and wire composition are all very responsive; there is deviation will influence welding quality to some extent slightly; for avoiding the appearance of the problems referred to above; should study from various aspects such as Control Welding Process, protective gas composition, wire compositions, effectively guarantee the welding method of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding quality to form a cover.
Summary of the invention
The object of the present invention is to provide a kind of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method; be a kind of at enhancing weld in welding experiment and the welding process, the welding method of effectively guaranteeing 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding quality that welding process, protective gas composition and wire composition are controlled.
The objective of the invention is to realize by following technical proposals:
0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method of the present invention is characterized in that comprising the steps:.
1) Control Welding Process
Polishing quality and preheat temperature, interlayer temperature and postheating behind carbon arc air gouging plane system groove in the strict control welding process, the back chipping:
A) because the phosphorus content of problem weld metal zone apparently higher than mother metal and welding wire, therefore adopts the metal covering after carbon arc air gouging digs system groove and back chipping, must adopt the polishing facility that the carburized layer that the carbon-point gouge produces is thoroughly polished off, expose metallic luster,
B) weld preheating: adopt coal gas evenly to heat before the weldering, confirm the weld zone, comprise that the temperature in the 100mm scope of groove both sides can be welded after 80-100 ℃,
C) interlayer temperature is controlled at 150-200 ℃, must carry out the interlayer cleaning, removes foreign material such as welding slag,
D) postheating: after the welding, adopt insulation material to be incubated processing, until being cooled to room temperature.
2) protective gas control:
A) protective gas proportioning: the percent by volume example of mist adopts Ar 94-96%, CO
26%-4%,
Arc length remains on 10-15mm when b) welding, and the long partially protection effect that reduces of arc length easily produces pore,
C) shield gas flow rate is controlled at 15-20L/min, is controlled at 18-22L/min during horizontal position welding, and flow is on the low side can influence protect effect, easily produces pore,
D) the moisture content impurity of strict control protective gas does not allow to exist moisture content,
3) wire composition control: the percentage by weight of wire composition is: C 0.013-0.015, Si0.54-0.56, Mn 0.73-0.75, P≤0.020, S≤0.004, Ni 4.90-5.50, Cr13.25-13.35, Mo 0.45-0.53.
CO in the described protective gas
2Volumn concentration be 5%.
The percentage by weight of described wire composition is: C 0.014, and Si 0.55, and Mn 0.74, P≤0.020, and S≤0.004, Ni 4.97, and Cr 13.31, and Mo 0.51.
Described polishing facility adopt emery wheel or rotary file.
The described insulation material that is incubated processing adopts asbestic blanket.
Control Welding Process of the present invention is the serious weld crack defective that occurs in the welding experiment, find that carbon arc air gouging in the welding process digs the control of polishing quality and preheat temperature, interlayer temperature and postheating behind system groove, the back chipping, this is all very important to welding quality, must in addition strict control:
By the problem weld seam being carried out chemical analysis chemical examination (as table one), the phosphorus content of finding the weld metal zone is apparently higher than mother metal and welding wire, therefore adopt the metal covering after carbon arc air gouging digs system groove and back chipping, must adopt emery wheel or rotary file that the carburized layer that the carbon-point gouge produces is thoroughly polished off, expose metallic luster, otherwise phosphorus content is high more, and cold cracking inclination is big more.
Table one
Weld preheating: adopt gas pipe evenly to heat before the weldering, affirmation weld zone (comprising groove both sides 100mm scope) temperature can be welded after 80-100 ℃.
Postheating: after the welding, adopt asbestic blanket to be incubated processing, until being cooled to room temperature.
By to the strictness of above process control, avoided because of the weld seam phosphorus content higher and preheat temperature to cross the hot and cold crack defect of the low or higher welding that causes effectively, the first-time qualification rate less than from the beginning 50% of weld seam UT flaw detection is brought up to more than 75%.
Protective gas control of the present invention is to make protective gas proportioning CO
2Content should guarantee to be generally 5%, along with CO at 4%-6%
2The raising of ratio is splashed and is increased, and surface film oxide also obviously thickens, and oxide-film can produce the phenomenon of bursting apart, and is difficult to remove with wire brush, easily forms slag inclusion.But if adopt pure Ar to protect, electricity lonely " deflection " is poor, unstable, and fusion penetration is shallow simultaneously, is unfavorable for actual welding, very easily produces the incomplete fusion phenomenon.Therefore, by comprehensive comparison, the ratio of mixing platform gas adopts Ar (94-96%)+CO
2(6%-4%) relatively rationally.
During welding, arc length is long partially can to reduce the protection effect, easily produces pore.
Gas flow preferably is controlled at 15-20L/min, and is big during horizontal position welding, and flow is on the low side can influence protect effect, easily produces pore.
The moisture content impurity of strict control protective gas can cause hydrogen induced cracking otherwise the hydrogen of water electrolysis infiltrates weld seam.
Wire composition control of the present invention is in actual production beginning and the welding process, adopt the different lot number welding wire welding of the trade mark of the same race, the notable difference that weldquality occurs, wire composition to different lot numbers has carried out chemically examining (as table two), and the test plate (panel) that adopts Ni content 4.56% and 4.97% has respectively been carried out service check (as table three).Thus welding wire Ni content is controlled at more than 4.9%, welding quality be improved significantly, weld seam UT flaw detection first-time qualification rate is brought up to more than 75%, finally solve a 0Cr13Ni5Mo martensitic stain less steel welding difficult problem, summed up the welding method that a cover is effectively guaranteed 0Cr13Ni5Mo martensitic stain less steel welding quality.By to the strictness of above process control, avoided because of the weld seam phosphorus content higher and preheat temperature to cross the hot and cold crack defect of the low or higher welding that causes effectively, the first-time qualification rate less than from the beginning 50% of weld seam UT flaw detection is brought up to more than 75%.
Table two
| C | Si | Mn | P | S | Ni | Cr | Mo | |
| Welding wire 1 | 0.015 | 0.50 | 0.60 | 0.020 | 0.005 | 4.56 | 13.41 | 0.60 |
| Wire composition | 0.014 | 0.55 | 0.74 | 0.020 | 0.004 | 4.97 | 13.31 | 0.51 |
By welding process and protective gas composition and wire compositions such as the polishing behind strictness control weld preheating, interlayer temperature, groove and the back chipping, postheatings; our factory has finally guaranteed the welding quality of 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel well; weld seam UT flaw detection first-time qualification rate is brought up to more than 80% from incipient less than 50%, reached advanced level of the same trade.
Table three
| Tensile strength (N/mm 2) | Clod wash α=180 d=40 (mm) | 0 ℃ of ballistic work V 2(J) | |||
| Welding wire 1 | 885 | Fracture | 38 | 38 | 34 |
| 865 | Fracture | 43 | 36 | ||
| 870 | Fracture | ||||
| 860 | Fracture | ||||
| Welding wire 2 | 875 | Intact | 40 | 75 | 110 |
| 867 | Intact | 57 | 69 | ||
| 880 | Intact | ||||
| 879 | Intact | ||||
The specific embodiment
Further specify the specific embodiment of the present invention below in conjunction with embodiment.
0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method of the present invention is characterized in that comprising the steps:.
1) Control Welding Process
Polishing quality and preheat temperature, interlayer temperature and postheating behind carbon arc air gouging plane system groove in the strict control welding process, the back chipping:
A) because the phosphorus content of problem weld metal zone apparently higher than mother metal and welding wire, therefore adopts the metal covering after carbon arc air gouging digs system groove and back chipping, must adopt the polishing facility that the carburized layer that the carbon-point gouge produces is thoroughly polished off, expose metallic luster,
B) weld preheating: adopt gas pipe evenly to heat before the weldering, confirm the weld zone, comprise that the temperature in the 100mm scope of groove both sides can be welded after 80-100 ℃,
C) interlayer temperature is controlled at below 150-200 ℃, must carry out the interlayer cleaning, removes foreign material such as welding slag,
D) postheating: after the welding, adopt insulation material to be incubated processing, until being cooled to room temperature.
2) protective gas control:
A) protective gas proportioning: the percent by volume example of mixing platform gas adopts Ar 94-96%, CO
26%-4%,
When b) welding, arc length remains on 10-15mm, and arc length is long partially can to reduce the protection effect, easily produces pore,
C) shield gas flow rate is controlled at 15-20L/min, is controlled at 18-22L/min during horizontal position welding, and flow is on the low side, and influence protection effect easily produces pore,
D) the moisture content impurity of strict control protective gas does not allow to exist moisture content,
3) wire composition control: the percentage by weight of wire composition is: C 0.013-0.015, Si0.54-0.56, Mn 0.73-0.75, P≤0.020, S≤0.004, Ni 4.90-5.50, Cr13.25-13.35, Mo 0.45-0.53.
CO in the described protective gas
2The volume percentage to contain be 5%.
The percentage by weight of described wire composition is: C 0.014, and Si 0.55, and Mn 0.74, P≤0.020, and S≤0.004, Ni 4.97, and Cr 13.31, and Mo 0.51.
Described polishing facility adopt emery wheel or rotary file.
The described insulation material that is incubated processing adopts asbestic blanket.
Control Welding Process of the present invention is the serious weld crack defective that occurs in the welding experiment, it is all very important to welding quality to find that carbon arc air gouging in the welding process digs behind system groove, the back chipping control of polishing quality and preheat temperature, interlayer temperature and postheating, must in addition strict control, avoid because of the weld seam phosphorus content higher and preheat temperature to cross the hot and cold crack defect of the low or higher welding that causes effectively, the first-time qualification rate less than from the beginning 50% of weld seam UT flaw detection is brought up to more than 80%.
Being applied to bamboo by the successful solder technology with above-mentioned 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel draws in the making of blue runner envelope; strict control weld preheating; interlayer temperature; polishing behind groove and the back chipping; welding process and protective gas composition and wire compositions such as postheating; make the weldquality of runner envelope key position martensitic stain less steel ball-type liner plate obtain effective control; reduced the weld seam repair rate significantly; thereby other frequent problems that occurs of professional water power production factory have also been avoided; promptly reprocess the welding deformation that causes in a large number because of weld seam; and finally causing product size overproof, local not enough processing or attenuate are overproof.Add the process feedback by the next procedure machine, 6 groups of bamboos of actual fabrication are drawn blue runner envelope, no matter welding quality or dimensional tolerance have all well reached design and relevant criterion requirement, be subjected to supervising the consistent favorable comment made from the user, on this basis, successfully make and making TV university holder mountain, the Kazakhstan runner envelope (5 groups) and the bright clever runner envelope (5 groups) of analog structure again in succession, considerable economic has been created in the open operation market of like product.
Claims (5)
1. a 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method is characterized in that comprising the steps:
1) Control Welding Process
Polishing quality and preheat temperature, interlayer temperature and postheating behind carbon arc air gouging plane system groove in the strict control welding process, the back chipping:
A) because the phosphorus content of problem weld metal zone apparently higher than mother metal and welding wire, therefore adopts the metal covering after carbon arc air gouging digs system groove and back chipping, must adopt the polishing facility that the carburized layer that the carbon-point gouge produces is thoroughly polished off, expose metallic luster,
B) weld preheating: adopt gas pipe evenly to heat before the weldering, confirm the weld zone, comprise that the temperature in the 100mm scope of groove both sides can be welded after 80-100 ℃,
C) interlayer temperature is controlled at below 150-200 ℃, must carry out the interlayer cleaning, removes foreign material such as welding slag,
D) postheating: after the welding, adopt insulation material to be incubated processing, until being cooled to room temperature.
2) protective gas control:
A) protective gas proportioning: the percent by volume example of mixing platform gas adopts Ar 94-96%, CO
26%-4%,
Arc length remains on 10-15mm when b) welding, and arc length is long partially can to reduce the protection effect, easily produces pore,
C) shield gas flow rate is controlled at 15-20L/min, is controlled at 18-22L/min during horizontal position welding, and flow is on the low side, and influence protection effect easily produces pore,
D) the moisture content impurity of strict control protective gas does not allow to exist moisture content,
3) wire composition control: the percentage by weight of wire composition is: C 0.013-0.015, Si0.54-0.56, Mn 0.73-0.75, P≤0.020, S≤0.004, Ni 4.90-5.50, Cr13.25-13.35, Mo 0.45-0.53.
2. 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method according to claim 1 is characterized in that the CO in the described protective gas
2Volumn concentration be 5%.
3. 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method according to claim 1, it is characterized in that the percentage by weight of described wire composition is: C 0.014, and Si 0.55, Mn 0.74, P≤0.020, S≤0.004, Ni 4.97, and Cr 13.31, and Mo 0.51.
4. 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method according to claim 1 is characterized in that described polishing facility adopt emery wheel or rotary file.
5. 0Cr13Ni5Mo Low Carbon Martensite Stainless Steel welding method according to claim 1 is characterized in that the described insulation material that is incubated processing adopts asbestic blanket.
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| CN101954547A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof |
| CN101704168B (en) * | 2009-09-24 | 2012-01-18 | 江苏大学 | Cavitation-corrosion-resistant surfacing welding material |
| CN102699308A (en) * | 2012-06-15 | 2012-10-03 | 中信戴卡轮毂制造股份有限公司 | Wheel mould distribution cone and welding method thereof |
| CN102794538A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Welding method for improving low-temperature impact toughness of low carbon martensite stainless steel welded joint |
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| CN104759788A (en) * | 2015-03-09 | 2015-07-08 | 西安理工大学 | OCr13Ni5Mo steel metal flux-cored wire and preparation method thereof |
| CN108274100A (en) * | 2018-04-26 | 2018-07-13 | 郑州煤矿机械集团股份有限公司 | The welding method of oil cylinder of hydraulic support stainless joint seat |
| CN109108435A (en) * | 2018-10-15 | 2019-01-01 | 中船澄西船舶修造有限公司 | A kind of stainless steel light wall pipe cold metal transfer welding procedure |
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| CN113814530A (en) * | 2021-09-28 | 2021-12-21 | 西门子工业透平机械（葫芦岛）有限公司 | Method for welding stainless steel and stainless steel workpiece |
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| CN101704168B (en) * | 2009-09-24 | 2012-01-18 | 江苏大学 | Cavitation-corrosion-resistant surfacing welding material |
| CN101954547B (en) * | 2010-04-20 | 2013-01-02 | 南京理工大学 | High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof |
| CN101954547A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | High-silicon extra-low-carbon stainless steel soldering wire and horizontal continuous-casting tandem-rolling continuous-drawing manufacturing method thereof |
| CN101954548B (en) * | 2010-04-20 | 2012-09-12 | 南京理工大学 | Ultra-low-carbon rare earth stainless steel welding wire and preparation method thereof |
| CN101954548A (en) * | 2010-04-20 | 2011-01-26 | 无锡南理工科技发展有限公司 | Ultra-low-carbon rare earth stainless steel welding wire and preparation method thereof |
| CN102699308A (en) * | 2012-06-15 | 2012-10-03 | 中信戴卡轮毂制造股份有限公司 | Wheel mould distribution cone and welding method thereof |
| CN102794538A (en) * | 2012-07-23 | 2012-11-28 | 宁夏共享集团有限责任公司 | Welding method for improving low-temperature impact toughness of low carbon martensite stainless steel welded joint |
| CN104759788A (en) * | 2015-03-09 | 2015-07-08 | 西安理工大学 | OCr13Ni5Mo steel metal flux-cored wire and preparation method thereof |
| CN104690395A (en) * | 2015-03-18 | 2015-06-10 | 上海振华重工(集团)股份有限公司 | Method for welding balance supporting block of large gate |
| CN108274100A (en) * | 2018-04-26 | 2018-07-13 | 郑州煤矿机械集团股份有限公司 | The welding method of oil cylinder of hydraulic support stainless joint seat |
| CN108274100B (en) * | 2018-04-26 | 2020-06-16 | 郑州煤矿机械集团股份有限公司 | Welding method of stainless steel joint seat of hydraulic support oil cylinder |
| CN109108435A (en) * | 2018-10-15 | 2019-01-01 | 中船澄西船舶修造有限公司 | A kind of stainless steel light wall pipe cold metal transfer welding procedure |
| CN110434503A (en) * | 2019-07-29 | 2019-11-12 | 沈阳露天采矿设备制造有限公司 | A kind of welding procedure of A743-CA6NM material |
| CN113814530A (en) * | 2021-09-28 | 2021-12-21 | 西门子工业透平机械（葫芦岛）有限公司 | Method for welding stainless steel and stainless steel workpiece |
| CN113814530B (en) * | 2021-09-28 | 2023-08-08 | 西门子能源工业透平机械(葫芦岛)有限公司 | Stainless steel welding method and stainless steel workpiece |
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