CN104384676A - Welding process of aluminum bronze and low-alloy steel - Google Patents
Welding process of aluminum bronze and low-alloy steel Download PDFInfo
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- CN104384676A CN104384676A CN201410401043.0A CN201410401043A CN104384676A CN 104384676 A CN104384676 A CN 104384676A CN 201410401043 A CN201410401043 A CN 201410401043A CN 104384676 A CN104384676 A CN 104384676A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
- B23K9/232—Arc welding or cutting taking account of the properties of the materials to be welded of different metals
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/18—Dissimilar materials
- B23K2103/22—Ferrous alloys and copper or alloys thereof
Abstract
The invention discloses a welding process of aluminum bronze and low-alloy steel. The process comprises the following steps: welding preparation and primary preheating: a base metal is cleaned, and is preheated to the temperature of 250-300 DEG C, and a welding rod is dried for 2 hours at the temperature of 200-250 DEG C ; surfacing of a transition layer: the transition layer is surfaced on the low-alloy steel base metal by shielded metal arc welding; secondary preheating: the base metal and the transition layer are preheated to the temperature of 150-200 DEG C; welding: a welding line is connected by consumable electrode argon arc welding; and insulation and slow cooling after the welding: the cooling speed is not higher than 50 DEG C/h, and a finished product is obtained by cooling in air below 150 DEG C. The welding process can obtain the welding line with excellent fusion with the base metal and good crack resistance, and improves the welding efficiency.
Description
Technical field
The present invention relates to the welding procedure of a kind of aluminium bronze and low-alloy steel.
Background technology
Aluminium bronze has excellent mechanics, against corrosion and anti-wear performance, it is the structural timber that combination property is superior, thus occupy an important position in civilian, military industry, be widely used in machinery, aircraft and auto manufacturing, boats and ships and marine industry, metallurgy, petrochemical industry and building industry etc.And when manufacturing some metal structure, often needing aluminium bronze and steel to weld together, the rational Welding Structure of serviceability can not only be manufactured like this, and the use amount of the higher aluminium bronze of cost can be saved.
The fusing point of aluminium bronze and steel, thermal conductivity, linear expansion coefficient and mechanical property have very large difference.During welding, the aluminium bronze of low melting point first melts, and dystectic iron is still in solid heated condition, and the two is difficult to fusion.And welding process center tap place can produce larger thermal stress, increase crackle tendency.Aluminum current bronze mainly contains several method with welding of low-alloy steel: (1) adopts soldering or oxyacetylene gas welding, and because needs add soldering paste, welding procedure is more loaded down with trivial details; (2) adopt the heat less argon tungsten-arc welding of input or SMAW, this welding method efficiency is lower; (3) the Ni-based wlding selecting weldability good welds, and this kind of wlding cost is higher.Therefore, need to provide a kind of new technical scheme to solve the problems referred to above.
Summary of the invention
For solving the problem, the invention provides the welding procedure of a kind of aluminium bronze and low-alloy steel.Mother metal and weld seam fuse well, and appearance of weld is attractive in appearance, and crackle tendency is low, and welding efficiency is high, and cost is lower.
The technical solution used in the present invention:
A welding procedure for aluminium bronze and low-alloy steel, comprises the following steps:
Step 1: welds prepares and a preheating, carefully clears up the moisture on aluminium bronze mother metal and low-alloy steel mother metal surface, grease, impurity and metal oxide film before welding, all will expose metallic luster; Then carry out preheating to aluminium bronze, low-alloy steel mother metal, preheat temperature is 250 DEG C ~ 300 DEG C, and cures welding rod, and bake out temperature is 200 DEG C ~ 250 DEG C, drying time 2h;
Step 2: built-up welding transition zone, built-up welding one deck transition zone on low alloy steel substrate is welded in welding rod arc, in welding rod arc built-up welding operation, electric current is 100 ~ 150A, voltage is 21 ~ 24V, speed of welding is 7 ~ 15cm/min, and interlayer temperature controls within the scope of 250 DEG C ~ 300 DEG C, by smooth for the transition zone surface finish of built-up welding after built-up welding completes;
Step 3: secondary preheating, by aluminium bronze, low-alloy steel mother metal and transition zone preheating together, preheat temperature is 150 DEG C ~ 200 DEG C;
Step 4: welding, metal argon arc welding is adopted to be welded to connect weld seam on transition zone, metal argon arc welding connects in operation, electric current is 200 ~ 260A, voltage is 22 ~ 25A, and speed of welding is 30 ~ 50cm/min, and interlayer temperature is at 150 DEG C ~ 250 DEG C, starting the arc during welding, receipts arc evenly, are as the criterion without delamination, pore, slag inclusion, crackle or incomplete fusion defect with welding bead;
Step 5: after welding treatment, after having welded, cover immediately by heat-preservation cotton, insulation slow cooling, cooling velocity is not more than 50 DEG C/h, gets product in less than 150 DEG C air after cooling.
Aluminium bronze material has the composition of following mass percentage: Al:5% ~ 15%, Ni:2% ~ 6%, Mn :≤5%, Cu: >=75%; Low-alloy steel material has the composition of following mass percentage: C :≤0.18%, Si :≤0.6%, Mn :≤2.5%, carbon equivalent Ceq≤0.45.
In step 2, the deposited metal composition scope of built-up welding transition zone welding rod is: Si≤1.5%, 6%≤Al≤10%, Fe≤8%, Pb≤0.02%, Cu >=80%.
In step 4, the deposited metal composition scope of the welding wire that metal argon arc welding adopts is: Mn≤15%, 1.5%≤Ni≤5%, 5%≤Al≤12%, Fe≤8%, Pb≤0.02%, Cu >=70%.
The invention has the beneficial effects as follows: adopt said welding method, the complete inspection weld appearance of welding, appearance of weld is good, does not find the defect such as crackle, pore, undercut, after 48 hours, butt welding comments test plate (panel) to carry out 100% penetrant inspection inspection, and welding point does not find any weld defect.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of welding point form of the present invention;
Fig. 2 is the flow chart of steps of welding procedure of the present invention;
Fig. 3 is the weld seam metallographic structure figure that welding procedure of the present invention obtains.
Wherein, 1, aluminium bronze mother metal, 2, low-alloy steel mother metal, 3, transition zone, 4, weld seam.
Detailed description of the invention
Following embodiment only for illustration of the present invention, but can not limit protection scope of the present invention.
Embodiment 1
Shown in Fig. 1,2,3, the welding procedure of a kind of aluminium bronze and low-alloy steel, comprises the following steps:
Step 1: welds prepares and a preheating, carefully clears up the moisture on aluminium bronze mother metal 1 and low-alloy steel mother metal 2 surface, grease, impurity and metal oxide film before welding, all will expose metallic luster; Then carry out preheating to aluminium bronze, low-alloy steel mother metal 1,2, preheat temperature is 250 DEG C, and cures welding rod, and bake out temperature is 200 DEG C, drying time 2h;
Step 2: built-up welding transition zone 3, built-up welding one deck transition zone 3 on low alloy steel substrate is welded in welding rod arc, in welding rod arc built-up welding operation, electric current is 100A, voltage is 21V, speed of welding is 7cm/min, and interlayer temperature controls within the scope of 250 DEG C, by smooth for the transition zone surface finish of built-up welding after built-up welding completes;
Step 3: secondary preheating, by aluminium bronze, low-alloy steel mother metal 1,2 and transition zone 3 preheating together, preheat temperature is 150 DEG C;
Step 4: welding, adopt metal argon arc welding on transition zone, be welded to connect weld seam 4, metal argon arc welding connects in operation, electric current is 200A, voltage is 22A, and speed of welding is 30cm/min, and interlayer temperature is at 150 DEG C, starting the arc during welding, receipts arc evenly, are as the criterion without delamination, pore, slag inclusion, crackle or incomplete fusion defect with welding bead;
Step 5: after welding treatment, after having welded, cover immediately by heat-preservation cotton, insulation slow cooling, cooling velocity is not more than 50 DEG C/h, gets product in less than 150 DEG C air after cooling.
Aluminium bronze material has the composition of following mass percentage: Al:5% ~ 15%, Ni:2% ~ 6%, Mn :≤5%, Cu: >=75%; Low-alloy steel material has the composition of following mass percentage: C :≤0.18%, Si :≤0.6%, Mn :≤2.5%, carbon equivalent Ceq≤0.45.
In step 2, the deposited metal composition scope of built-up welding transition zone welding rod is: Si≤1.5%, 6%≤Al≤10%, Fe≤8%, Pb≤0.02%, Cu >=80%.
In step 4, the deposited metal composition scope of the welding wire that metal argon arc welding adopts is: Mn≤15%, 1.5%≤Ni≤5%, 5%≤Al≤12%, Fe≤8%, Pb≤0.02%, Cu >=70%.
Embodiment 2
Shown in Fig. 1,2,3, the welding procedure of a kind of aluminium bronze and low-alloy steel, comprises the following steps:
Step 1: welds prepares and a preheating, carefully clears up the moisture on aluminium bronze mother metal 1 and low-alloy steel mother metal 2 surface, grease, impurity and metal oxide film before welding, all will expose metallic luster; Then carry out preheating to aluminium bronze, low-alloy steel mother metal 1,2, preheat temperature is 280 DEG C, and cures welding rod, and bake out temperature is 225 DEG C, drying time 2h;
Step 2: built-up welding transition zone 3, built-up welding one deck transition zone 3 on low alloy steel substrate is welded in welding rod arc, in welding rod arc built-up welding operation, electric current is 125A, voltage is 23V, speed of welding is 11cm/min, and interlayer temperature controls within the scope of 280 DEG C, by smooth for the transition zone surface finish of built-up welding after built-up welding completes;
Step 3: secondary preheating, by aluminium bronze, low-alloy steel mother metal 1,2 and transition zone 3 preheating together, preheat temperature is 180 DEG C;
Step 4: welding, adopt metal argon arc welding on transition zone, be welded to connect weld seam 4, metal argon arc welding connects in operation, electric current is 230A, voltage is 23A, and speed of welding is 40cm/min, and interlayer temperature is at 200 DEG C, starting the arc during welding, receipts arc evenly, are as the criterion without delamination, pore, slag inclusion, crackle or incomplete fusion defect with welding bead;
Step 5: after welding treatment, after having welded, cover immediately by heat-preservation cotton, insulation slow cooling, cooling velocity is not more than 50 DEG C/h, gets product in less than 150 DEG C air after cooling.
Aluminium bronze material has the composition of following mass percentage: Al:5% ~ 15%, Ni:2% ~ 6%, Mn :≤5%, Cu: >=75%; Low-alloy steel material has the composition of following mass percentage: C :≤0.18%, Si :≤0.6%, Mn :≤2.5%, carbon equivalent Ceq≤0.45.
In step 2, the deposited metal composition scope of built-up welding transition zone welding rod is: Si≤1.5%, 6%≤Al≤10%, Fe≤8%, Pb≤0.02%, Cu >=80%.
In step 4, the deposited metal composition scope of the welding wire that metal argon arc welding adopts is: Mn≤15%, 1.5%≤Ni≤5%, 5%≤Al≤12%, Fe≤8%, Pb≤0.02%, Cu >=70%.
Embodiment 3
Shown in Fig. 1,2,3, the welding procedure of a kind of aluminium bronze and low-alloy steel, comprises the following steps:
Step 1: welds prepares and a preheating, carefully clears up the moisture on aluminium bronze mother metal 1 and low-alloy steel mother metal 2 surface, grease, impurity and metal oxide film before welding, all will expose metallic luster; Then carry out preheating to aluminium bronze, low-alloy steel mother metal 1,2, preheat temperature is 300 DEG C, and cures welding rod, and bake out temperature is 250 DEG C, drying time 2h;
Step 2: built-up welding transition zone 3, built-up welding one deck transition zone 3 on low alloy steel substrate is welded in welding rod arc, in welding rod arc built-up welding operation, electric current is 150A, voltage is 24V, speed of welding is 15cm/min, and interlayer temperature controls within the scope of 300 DEG C, by smooth for the transition zone surface finish of built-up welding after built-up welding completes;
Step 3: secondary preheating, by aluminium bronze, low-alloy steel mother metal 1,2 and transition zone 3 preheating together, preheat temperature is 200 DEG C;
Step 4: welding, adopt metal argon arc welding on transition zone, be welded to connect weld seam 4, metal argon arc welding connects in operation, electric current is 260A, voltage is 25A, and speed of welding is 50cm/min, and interlayer temperature is at 250 DEG C, starting the arc during welding, receipts arc evenly, are as the criterion without delamination, pore, slag inclusion, crackle or incomplete fusion defect with welding bead;
Step 5: after welding treatment, after having welded, cover immediately by heat-preservation cotton, insulation slow cooling, cooling velocity is not more than 50 DEG C/h, gets product in less than 150 DEG C air after cooling.
Aluminium bronze material has the composition of following mass percentage: Al:5% ~ 15%, Ni:2% ~ 6%, Mn :≤5%, Cu: >=75%; Low-alloy steel material has the composition of following mass percentage: C :≤0.18%, Si :≤0.6%, Mn :≤2.5%, carbon equivalent Ceq≤0.45.
In step 2, the deposited metal composition scope of built-up welding transition zone welding rod is: Si≤1.5%, 6%≤Al≤10%, Fe≤8%, Pb≤0.02%, Cu >=80%.
In step 4, the deposited metal composition scope of the welding wire that metal argon arc welding adopts is: Mn≤15%, 1.5%≤Ni≤5%, 5%≤Al≤12%, Fe≤8%, Pb≤0.02%, Cu >=70%.
Adopt said welding method, the complete inspection weld appearance of welding, appearance of weld is good, and do not find the defect such as crackle, pore, undercut, after 48 hours, butt welding comments test plate (panel) to carry out 100% penetrant inspection inspection, and welding point does not find any weld defect.
The welding procedure of aluminium bronze of the present invention and low-alloy steel, comprise a preheating and secondary preheating two warms, thermal stress can be reduced, avoid hardening cracking (because poor thermal conductivity of steel alloy), at twice preheating intermediate demand SMAW built-up welding transition zone, the effect of built-up welding transition zone: 1, be connected surface layer and mother metal; 2, dilute mother metal surface stress, prevent welding and cracking in using.Adopt metal argon arc welding to be welded to connect weld seam after secondary preheating on transition zone, in order to reduce bead crack, weld preheating, controls interlayer temperature, ensures that joint environment temperature is relatively higher, and postwelding needs to be incubated slow cooling.
Claims (4)
1. a welding procedure for aluminium bronze and low-alloy steel, is characterized in that, comprises the following steps:
Step 1: welds prepares and a preheating, carefully clears up the moisture on aluminium bronze mother metal and low-alloy steel mother metal surface, grease, impurity and metal oxide film before welding, all will expose metallic luster; Then carry out preheating to aluminium bronze, low-alloy steel mother metal, preheat temperature is 250 DEG C ~ 300 DEG C, and cures welding rod, and bake out temperature is 200 DEG C ~ 250 DEG C, drying time 2h;
Step 2: built-up welding transition zone, built-up welding one deck transition zone on low alloy steel substrate is welded in welding rod arc, in welding rod arc built-up welding operation, electric current is 100 ~ 150A, voltage is 21 ~ 24V, speed of welding is 7 ~ 15cm/min, and interlayer temperature controls within the scope of 250 DEG C ~ 300 DEG C, by smooth for the transition zone surface finish of built-up welding after built-up welding completes;
Step 3: secondary preheating, by aluminium bronze, low-alloy steel mother metal and transition zone preheating together, preheat temperature is 150 DEG C ~ 200 DEG C;
Step 4: welding, metal argon arc welding is adopted to be welded to connect weld seam on transition zone, metal argon arc welding connects in operation, electric current is 200 ~ 260A, voltage is 22 ~ 25A, and speed of welding is 30 ~ 50cm/min, and interlayer temperature is at 150 DEG C ~ 250 DEG C, starting the arc during welding, receipts arc evenly, are as the criterion without delamination, pore, slag inclusion, crackle or incomplete fusion defect with welding bead;
Step 5: after welding treatment, after having welded, cover immediately by heat-preservation cotton, insulation slow cooling, cooling velocity is not more than 50 DEG C/h, gets product in less than 150 DEG C air after cooling.
2. the welding procedure of a kind of aluminium bronze according to claim 1 and low-alloy steel, is characterized in that: aluminium bronze material has the composition of following mass percentage: Al:5% ~ 15%, Ni:2% ~ 6%, Mn :≤5%, Cu: >=75%; Low-alloy steel material has the composition of following mass percentage: C :≤0.18%, Si :≤0.6%, Mn :≤2.5%, carbon equivalent Ceq≤0.45.
3. the welding procedure of a kind of aluminium bronze according to claim 1 and low-alloy steel, is characterized in that: in step 2, and the deposited metal composition scope of built-up welding transition zone welding rod is: Si≤1.5%, 6%≤Al≤10%, Fe≤8%, Pb≤0.02%, Cu >=80%.
4. the welding procedure of a kind of aluminium bronze according to claim 1 and low-alloy steel, is characterized in that: in step 4, and the deposited metal composition scope of the welding wire that metal argon arc welding adopts is: Mn≤15%, 1.5%≤Ni≤5%, 5%≤Al≤12%, Fe≤8%, Pb≤0.02%, Cu >=70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401043.0A CN104384676B (en) | 2014-08-15 | A kind of aluminium bronze and the welding procedure of low-alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401043.0A CN104384676B (en) | 2014-08-15 | A kind of aluminium bronze and the welding procedure of low-alloy steel |
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| Publication Number | Publication Date |
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| CN104384676A true CN104384676A (en) | 2015-03-04 |
| CN104384676B CN104384676B (en) | 2016-11-30 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108282A (en) * | 2015-08-10 | 2015-12-02 | 安徽富煌钢构股份有限公司 | Consumable-electrode argon arc welding process for aluminum alloy and wear-resisting steel dissimilar metal |
| CN106077912A (en) * | 2016-06-30 | 2016-11-09 | 洛阳双瑞金属复合材料有限公司 | A kind of complex brass clad steel plate is not associated with district's repair method |
| CN107645827A (en) * | 2017-09-20 | 2018-01-30 | 苏州三冷暖工程有限公司 | A kind of high radiating progressive metal-layer structure of level |
| CN108581140A (en) * | 2018-07-27 | 2018-09-28 | 沈亚仁 | Gunmetal welding procedure |
| CN108672868A (en) * | 2018-04-18 | 2018-10-19 | 江苏理工学院 | A kind of welding method of aluminium and copper different metal materials |
| CN109128436A (en) * | 2018-10-15 | 2019-01-04 | 武汉船用机械有限责任公司 | A kind of process of the built-up welding aluminium bronze on steel |
| CN109290661A (en) * | 2017-07-25 | 2019-02-01 | 唐山瑞格特机械设备制造有限公司 | A kind of welding method of novel blast-furnace hole bit |
| CN110587074A (en) * | 2019-09-29 | 2019-12-20 | 无锡市锡西化机配件有限公司 | Surfacing welding process for copper pipe and stainless steel pipe |
| CN112296492A (en) * | 2019-12-04 | 2021-02-02 | 中国商用飞机有限责任公司 | Welding process method of dissimilar metal piece |
| CN113210813A (en) * | 2021-04-22 | 2021-08-06 | 浙江富春江水电设备有限公司 | Welding method of nickel-aluminum-bronze workpiece |
| CN113334841A (en) * | 2021-06-16 | 2021-09-03 | 中机智能装备创新研究院(宁波)有限公司 | Skateboard and preparation method thereof |
| CN115213529A (en) * | 2022-07-14 | 2022-10-21 | 国家能源集团科学技术研究院有限公司 | Welding process for silicon bronze guide strip of large cylindrical valve |
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| CN101284339A (en) * | 2008-01-18 | 2008-10-15 | 哈尔滨工业大学 | Welding wire and method for welding the aluminum and aluminum alloy and steel |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108282A (en) * | 2015-08-10 | 2015-12-02 | 安徽富煌钢构股份有限公司 | Consumable-electrode argon arc welding process for aluminum alloy and wear-resisting steel dissimilar metal |
| CN106077912A (en) * | 2016-06-30 | 2016-11-09 | 洛阳双瑞金属复合材料有限公司 | A kind of complex brass clad steel plate is not associated with district's repair method |
| CN106077912B (en) * | 2016-06-30 | 2018-10-23 | 洛阳双瑞金属复合材料有限公司 | A kind of unbonded area's repair method of complex brass clad steel plate |
| CN109290661A (en) * | 2017-07-25 | 2019-02-01 | 唐山瑞格特机械设备制造有限公司 | A kind of welding method of novel blast-furnace hole bit |
| CN107645827A (en) * | 2017-09-20 | 2018-01-30 | 苏州三冷暖工程有限公司 | A kind of high radiating progressive metal-layer structure of level |
| CN107645827B (en) * | 2017-09-20 | 2019-12-10 | 苏州三一冷暖工程有限公司 | High heat dissipation level progressive metal layer structure |
| CN108672868A (en) * | 2018-04-18 | 2018-10-19 | 江苏理工学院 | A kind of welding method of aluminium and copper different metal materials |
| CN108581140A (en) * | 2018-07-27 | 2018-09-28 | 沈亚仁 | Gunmetal welding procedure |
| CN109128436A (en) * | 2018-10-15 | 2019-01-04 | 武汉船用机械有限责任公司 | A kind of process of the built-up welding aluminium bronze on steel |
| CN110587074A (en) * | 2019-09-29 | 2019-12-20 | 无锡市锡西化机配件有限公司 | Surfacing welding process for copper pipe and stainless steel pipe |
| CN112296492A (en) * | 2019-12-04 | 2021-02-02 | 中国商用飞机有限责任公司 | Welding process method of dissimilar metal piece |
| CN112296492B (en) * | 2019-12-04 | 2022-05-24 | 中国商用飞机有限责任公司 | Welding process method of dissimilar metal piece |
| CN113210813A (en) * | 2021-04-22 | 2021-08-06 | 浙江富春江水电设备有限公司 | Welding method of nickel-aluminum-bronze workpiece |
| CN113210813B (en) * | 2021-04-22 | 2022-05-10 | 杭州浙富核电设备有限公司 | Welding method of nickel-aluminum-bronze workpiece |
| CN113334841A (en) * | 2021-06-16 | 2021-09-03 | 中机智能装备创新研究院(宁波)有限公司 | Skateboard and preparation method thereof |
| CN115213529A (en) * | 2022-07-14 | 2022-10-21 | 国家能源集团科学技术研究院有限公司 | Welding process for silicon bronze guide strip of large cylindrical valve |
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