CN103042316A - Ultra-low temperature austenite stainless steel solid core welding wire - Google Patents
Ultra-low temperature austenite stainless steel solid core welding wire Download PDFInfo
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- CN103042316A CN103042316A CN2012105586509A CN201210558650A CN103042316A CN 103042316 A CN103042316 A CN 103042316A CN 2012105586509 A CN2012105586509 A CN 2012105586509A CN 201210558650 A CN201210558650 A CN 201210558650A CN 103042316 A CN103042316 A CN 103042316A
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Abstract
The invention aims to the characteristic that ultra-low temperature stainless steel material is required to be good in low-temperature flexibility, and provides a stainless steel alloy welding wire. The stainless steel alloy welding wire can ensure that the austenite structure of weld metal achieves more than 99%; the welding seam center can achieve about 100J under the impact ductility of lower than 77K; the welding wire is good in low-temperature flexibility, and comprises the following ally components: smaller than or equal to 0.03% of C, smaller than or equal to 1.00% of Si, 18.0-26.0% of Cr, 10%-25% of Ni, 0-5.5% of Mo, 1.5%-7.0% of Mn, 0.05%-0.25% of N, smaller than or equal to 0.015% of S, smaller than or equal to 0.015% of P, 0-0.6% of RE, and the balance of Fe. The ultra-low temperature austenite stainless steel solid core welding wire can be widely applied to the technical field of welding ultra-low temperature stainless steel pressure containers and special structures.
Description
Technical field
Present technique relates to the field of welding material of austenitic stainless steel.
Background technology
Because the commercial Application of liquid nitrogen and liquid helium, and the used ultralow temperature rustless steel container of liquefied natural gas transport and the application of equipment, very high requirement has been proposed for the welding of austenitic stainless steel material.
What serviceability was best in ultra-low temperature surroundings is exactly ultra-low carbon austenitic stainless steel, and these materials use necessary the relatively stable of austenite structure that keep in ultra-low temperature surroundings, but in the stainless steel soldering theory, do not emphasize the stability of austenite structure in the weld metal, emphasize on the contrary to increase the ferritic scope of part, otherwise easily cause the generation of HOT CRACK FOR WELDING P.On the contrary, in the stainless environment for use of ultralow temperature, must keep the stability of austenite structure, the expansion of control ferrite scope.And the stainless steels such as nitrogenous stainless steel such as 304LN, 316LN, 317LN have good ultralow-temperature flexibility, although the low-temperature flexibility of body is fine, the supporting of welding material do not mate, and the welding material of domestic existing apolegamy is unsatisfactory.
200810040897.5 1 kinds of stainless steel welding sticks of patent of invention and welding procedure thereof are mainly used in the welding of martensite and ferritic stainless steel, with technical field of the present invention very large difference are arranged.
201110308343.0 1 kinds of high-strength tenacity full austenites of patent of invention stainless steel welding stick although emphasized to improve the toughness of weld metal, still has larger difference with technology contents of the present invention and purposes.
Purpose of the present invention will develop exactly in a kind of stainless steel weld joint that ferrite content is extremely low, the good austenitic stainless steel welding wire of toughness, has good tissue and low-temperature flexibility to satisfy the high-grade stainless steel weld seam under the ultralow temperature state.
Summary of the invention
For the ultralow temperature stainless steel material, must consider the low-temperature flexibility of weld metal, low-temperature flexibility must have again enough austenite structures more than 99%, and want to keep the stable of austenite structure, must suppress the expansion of ferritic structure, in this case, not only to improve the content of Mn and Ni, also must in weld metal, keep the nitrogen element basically identical with mother metal.
Nitrogen is to form very consumingly and stable austenite and enlarge the forming element of austenite phase region, nitrogen forms austenitic ability and approximately is equivalent to 30 times of nickel, the invigoration effect of nitrogen element solid solution is obvious in addition, can significantly improve the intensity of material, and fracture toughness does not reduce.In welding process, meeting scaling loss about 20%, if there is not the nitrogen element in the welding material, or the nitrogen element is very low, also will cause the decline of weld metal performance.So, the objective of the invention is significantly to improve the low-temperature flexibility of weld metal take the stable and austenite structure that improves material as purpose.
In sum, the chemical composition of the ultralow temperature welding wire of the present invention's exploitation is as follows:
C :≤0.03%, Si :≤1.00%, Cr:18.0～26.0%, Ni:10～25%, Mo:0～5.5%, Mn:1.5～7.0%, N:0.05～0.25%, S≤0.015, P≤0.015%, RE:0～0.6%, surplus is Fe.
The characteristics of present technique are as much as possible harmful C content is controlled lower; Si is ferrite former, also should carry out the control of minimum index; Cr and Ni content are as far as possible all high more than 2% than mother metal; Mn is effectively austenite former, and the amount of adding in the welding wire should be higher than mother metal; N is the most effective strong austenite former; S and P will control more low better as impurity component; The purpose of adding rare earth is to improve the toughness of material in crystal grain thinning.
Technical thought is that the C that will affect interstitial compound strictly controls, the S, the P content that affect toughness of material and plasticity are also strictly controlled, Ni, Mn, the N that can stablize and enlarge austenite structure increase as the alloy content of alloying element, to reach and to meet the instructions for use of weld metal in ultra-low temperature surroundings.Because N has a small amount of scaling loss in welding process, so the composition of N should be defined as in actual applications 1.2～1.5 times of mother metal.
The specific embodiment
Use vacuum melting technique; smelt the excellent blank of needed chemical composition prescription; after the solution annealing processing; by repeatedly being drawn into the welding wire of the following all size of 5.0mm; 2.5 the welding wire of～5.0mm is as submerged-arc welding; 0.6～1.6mm can be used as gas shielded arc welding, the welding wire of 0.6～2.0mm can be used as craft and argonaut welding.
Embodiment 1, the stainless steel welding stick composition of welding 304L:
C :≤0.03%, Si :≤0.60%, Cr:19.0～22.0%, Ni:10～12%, Mo:0%, Mn:2.0～4.0%, N:0.05～0.10%, S≤0.015, P≤0.015%, RE:0.10%(addition), surplus is Fe.
Embodiment 2, the stainless steel welding stick composition of welding 316LN:
C :≤0.03%, Si :≤0.60%, Cr:22.0～26.0%, Ni:12～15%, Mo:2.5～3.5%, Mn:4.0～6.5%, N:0.12～0.18%, S≤0.015, P≤0.015%, RE:0.10%(addition), surplus is Fe.
Used the welding wire of the technical program embodiment 2 in the project of international thermonuclear fusion experimental reactor soldering test, welding performance is good, and its weld metal can satisfy 316LN fully to be used in ultra-low temperature surroundings.
Below be the 316LN stainless steel material, with the technical data of technological achievement of the present invention welding:
According to GB150-2011 " pressure vessel " the 4th part regulation, stainless steel in the ballistic work index of low temperature-100 ℃ is 〉=31J.And the ballistic work index of welding material of the present invention in the time of-196 ℃ reached 106.7J, illustrates that the performance of its low-temperature flexibility is very good.
The weld metal of the austenitic stainless steel that uses in ultra-low temperature surroundings keeps austenite structure stability extremely important.According to the GB1954 method weld metal that contains stainless steel welding stick welding of the present invention is carried out the ferrite content test, the maximum average value of mensuration is 0.16%.
In common austenitic stainless steel, the ferrite content of weld metal is approximately 4%～10% all greater than the ferrite content of mother metal, otherwise HOT CRACK FOR WELDING P easily occurs.And the stainless steel welding stick of the technology of the present invention has not only suppressed the expansion of ferrite phase region, and does not find any HOT CRACK FOR WELDING P in the weld seam process, and the result that the technology of the present invention is described is ideal.
Use stainless steel welding stick of the present invention, can be used for the welding manners such as manual and automatic non-consumable gas shielded arc welding, semi-automatic and automatic gas metal-arc welding, automatic submerged arc welding and full-automatic narrow clearance melting electrode gas shielded arc welding.
Use the stainless steel welding stick of patent of the present invention, resulting weld metal is under the prerequisite that ferrite content is strictly controlled, both guaranteed the stability of austenite structure, improved again the serviceability of weld metal under the ultralow-temperature operation conditions condition, not only be suitable in various ultra-low temperature surroundings, using, the toughness index that it is good is more suitable for using in other temperature environment or in the environment of specific (special) requirements, is worthy of popularization.
Claims (2)
1. one kind " ultralow temperature austenitic stainless steel solid core welding wire " is characterized in that, the chemical composition of described ultralow temperature solid core welding wire is:
C :≤0.03%, Si :≤1.00%, Cr:18.0～26.0%, Ni:10～25%, Mo:0～5.5%, Mn:1.5～7.0%, N:0.05～0.25%, S≤0.015, P≤0.015%, RE:0～0.6%, surplus is Fe.
2. austenitic stainless steel solid core welding wire as claimed in claim 1; become excellent blank through vacuum metling; by repeatedly being drawn into the welding wire of the following all size of 5.0mm; wherein the welding wire of 2.5～5.0mm is as submerged-arc welding; 0.6 the welding wire of～1.6mm is as gas shielded arc welding, the welding wire of 0.6～2.0mm is as craft and argonaut welding.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706963A (en) * | 2013-12-11 | 2014-04-09 | 四川大西洋焊接材料股份有限公司 | Stainless steel welding electrode used for third-generation nuclear power main pipeline and production method of stainless steel welding electrode |
| CN104227265A (en) * | 2014-07-25 | 2014-12-24 | 洛阳双瑞特种合金材料有限公司 | Ultrahigh-intensity all-austenite stainless steel welding wire |
| CN105537795A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Welding wire for welding urea |
| CN106271199A (en) * | 2016-08-05 | 2017-01-04 | 天长市通联焊业有限公司 | A kind of corrosion-resistant welding wire of low-temperature storage tank |
| CN108406167A (en) * | 2017-02-09 | 2018-08-17 | 奥林康焊接技术有限公司 | Sintered flux and the austenitic stainless steel buried arc welding method for using the solder flux |
| CN110014244A (en) * | 2019-04-16 | 2019-07-16 | 湖南机电职业技术学院 | It is a kind of can low-temperature welding stainless steel material welding wire |
| CN110064865A (en) * | 2019-05-06 | 2019-07-30 | 上海炳晟机电科技有限公司 | A kind of gas shield welding wire welded for circulating fluidized bed boiler rare earth alloy backplate and water-cooling wall fin |
| CN110257690A (en) * | 2019-06-25 | 2019-09-20 | 宁波宝新不锈钢有限公司 | A kind of resource-conserving austenitic heat-resistance steel and preparation method thereof |
| CN110280923A (en) * | 2019-06-13 | 2019-09-27 | 江苏大学 | The welding method of 800H alloy welding Fe-Ni based alloy welding wire and preparation method thereof, 800H alloy |
| CN110576273A (en) * | 2019-09-10 | 2019-12-17 | 武汉市润之达石化设备有限公司 | Metal material, process and product for welding LNG (liquefied natural gas) ultralow-temperature stainless steel |
| CN110576274A (en) * | 2019-09-10 | 2019-12-17 | 武汉市润之达石化设备有限公司 | Metal material, process and product for welding high-temperature high-pressure stainless steel pipeline |
| CN111230255A (en) * | 2020-01-19 | 2020-06-05 | 武汉一冶钢结构有限责任公司 | Welding method for improving low-temperature toughness of 304L austenitic stainless steel welding joint |
| CN112247396A (en) * | 2020-10-26 | 2021-01-22 | 南京工程学院 | Austenite heat-resistant steel welding wire and preparation method and application thereof |
| CN112621021A (en) * | 2020-12-26 | 2021-04-09 | 江苏新核合金科技有限公司 | H0Cr19Ni24Mn7Mo6VN welding wire and preparation method thereof |
| CN113146095A (en) * | 2021-03-01 | 2021-07-23 | 哈尔滨威尔焊接有限责任公司 | Special welding material for austenite high-alloy steel and application |
| JP2021142567A (en) * | 2015-12-23 | 2021-09-24 | グッドウィン ピーエルシーGoodwin Plc | Steel, welding consumable, cast, forged or wrought product, method of welding, welded product and method of heat treating |
| CN115922144A (en) * | 2022-12-13 | 2023-04-07 | 振石集团华智研究院(浙江)有限公司 | Austenitic stainless steel welding wire and preparation method thereof |
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| CN103706963A (en) * | 2013-12-11 | 2014-04-09 | 四川大西洋焊接材料股份有限公司 | Stainless steel welding electrode used for third-generation nuclear power main pipeline and production method of stainless steel welding electrode |
| CN104227265A (en) * | 2014-07-25 | 2014-12-24 | 洛阳双瑞特种合金材料有限公司 | Ultrahigh-intensity all-austenite stainless steel welding wire |
| CN104227265B (en) * | 2014-07-25 | 2017-02-15 | 洛阳双瑞特种合金材料有限公司 | Ultrahigh-intensity all-austenite stainless steel welding wire |
| CN105537795A (en) * | 2015-09-01 | 2016-05-04 | 上海大西洋焊接材料有限责任公司 | Welding wire for welding urea |
| JP2021142567A (en) * | 2015-12-23 | 2021-09-24 | グッドウィン ピーエルシーGoodwin Plc | Steel, welding consumable, cast, forged or wrought product, method of welding, welded product and method of heat treating |
| JP7230102B2 (en) | 2015-12-23 | 2023-02-28 | グッドウィン ピーエルシー | Steel, welding consumables, cast or forged or drawn products, welding methods, welded products, and heat treatment methods |
| CN106271199A (en) * | 2016-08-05 | 2017-01-04 | 天长市通联焊业有限公司 | A kind of corrosion-resistant welding wire of low-temperature storage tank |
| CN108406167A (en) * | 2017-02-09 | 2018-08-17 | 奥林康焊接技术有限公司 | Sintered flux and the austenitic stainless steel buried arc welding method for using the solder flux |
| CN110014244A (en) * | 2019-04-16 | 2019-07-16 | 湖南机电职业技术学院 | It is a kind of can low-temperature welding stainless steel material welding wire |
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| CN110064865B (en) * | 2019-05-06 | 2021-01-01 | 上海炳晟机电科技有限公司 | Gas shield welding wire for welding circulating fluidized bed boiler protection plate and water-cooled wall fin |
| CN110280923A (en) * | 2019-06-13 | 2019-09-27 | 江苏大学 | The welding method of 800H alloy welding Fe-Ni based alloy welding wire and preparation method thereof, 800H alloy |
| CN110257690A (en) * | 2019-06-25 | 2019-09-20 | 宁波宝新不锈钢有限公司 | A kind of resource-conserving austenitic heat-resistance steel and preparation method thereof |
| CN110576273A (en) * | 2019-09-10 | 2019-12-17 | 武汉市润之达石化设备有限公司 | Metal material, process and product for welding LNG (liquefied natural gas) ultralow-temperature stainless steel |
| CN110576274A (en) * | 2019-09-10 | 2019-12-17 | 武汉市润之达石化设备有限公司 | Metal material, process and product for welding high-temperature high-pressure stainless steel pipeline |
| CN111230255A (en) * | 2020-01-19 | 2020-06-05 | 武汉一冶钢结构有限责任公司 | Welding method for improving low-temperature toughness of 304L austenitic stainless steel welding joint |
| CN112247396A (en) * | 2020-10-26 | 2021-01-22 | 南京工程学院 | Austenite heat-resistant steel welding wire and preparation method and application thereof |
| CN112621021A (en) * | 2020-12-26 | 2021-04-09 | 江苏新核合金科技有限公司 | H0Cr19Ni24Mn7Mo6VN welding wire and preparation method thereof |
| CN113146095A (en) * | 2021-03-01 | 2021-07-23 | 哈尔滨威尔焊接有限责任公司 | Special welding material for austenite high-alloy steel and application |
| CN115922144A (en) * | 2022-12-13 | 2023-04-07 | 振石集团华智研究院(浙江)有限公司 | Austenitic stainless steel welding wire and preparation method thereof |
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Application publication date: 20130417 |