CN103495840B - The production method of double-layer alloy composite plate - Google Patents
The production method of double-layer alloy composite plate Download PDFInfo
- Publication number
- CN103495840B CN103495840B CN201310448263.4A CN201310448263A CN103495840B CN 103495840 B CN103495840 B CN 103495840B CN 201310448263 A CN201310448263 A CN 201310448263A CN 103495840 B CN103495840 B CN 103495840B
- Authority
- CN
- China
- Prior art keywords
- double
- layer
- blank
- layer alloy
- alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
Abstract
The invention discloses the production method of a kind of double-layer alloy composite plate, belong to sheet alloy technical field.It comprises the steps: that (1) adopts spun casting explained hereafter double-layer alloy composite hollow blank；(2) jumping-up；(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；(4) reaming；(5) extruding, obtains double-layer alloy multiple tube；(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；(7) arc is uniformly heated, then offset with mangle, namely obtain double-layer alloy composite plate.The present invention adopts spun casting explained hereafter hollow blank, and the two-layer alloy of alloy sheets forms metallurgical melting layer, and bond strength is high, inside and outside lamination gold not easily delamination splitting；Adopt upset forging process to improve the plasticity of centrifugal blank, the generation of crackle during pre-anti-extrusion, further increase double-layer alloy composite plate serviceability, safety and life-span.
Description
Technical field
The present invention relates to sheet alloy technical field.
Background technology
Composite metal plate refers to the plank in layer of metal coated with another metal, the effect of the cost that reached to economize on resources under the premise not reducing result of use (antiseptic property, mechanical strength etc.), reduce.Being mainly used in anticorrosion, pressure vessel manufacturing, electricity is built, petrochemical industry, medicine, light industry, automobile and other industries.
Metallic composite technology can play the respective advantage of group element material, realize the optimal allocation of each group element material resource, save precious metal material, realize the unappeasable performance requirement of single metal, for pressure vessel Stainless Steel-Carbon Steel Clad Sheet, outer layer is with general carbon steel (Q245R, Q345R etc.) there is good mechanical performance, cladding rustless steel (304, 316L etc.) there is good decay resistance, both generally adopt blast to weld together, have only to the high price rustless steel of several millimeters, substantial saving in cost, and change the various mechanical performances of base material hardly.It both can substitute import and fill the domestic gaps, and had again wide range of application, had good economic benefit and social benefit.
The production method of the composite plate of current heterogeneity alloy composition has a variety of, has explosive forming method, welding composite algorithm, spraying process, galvanoplastic etc..Explosive forming method loads on sheet material by the instantaneous pressure impulse load produced of exploding, and loading force is higher than the yield strength of metal material, and interface bond strength is higher, but the technological parameter of this method is difficult to accurate control, it is difficult to realize the compound of unlike material, and produces danger, contaminated environment；Welding composite algorithm, it is possible to the composite plate that production specification is bigger, but owing to there is heat affected area, and non-seam district easily occurs between layers, affect its interface bond strength；Spray, galvanoplastic composite bed thickness is little and cost high.
Summary of the invention
The present invention provides the production method of a kind of double-layer alloy composite plate, adopts spun casting explained hereafter hollow blank, and the two-layer alloy of alloy sheets forms metallurgical melting layer, and bond strength is high, inside and outside lamination gold not easily delamination splitting；Adopt upset forging process to improve the plasticity of centrifugal blank, the generation of crackle during pre-anti-extrusion, further increase double-layer alloy composite plate serviceability, safety and life-span.
The technical solution used in the present invention is:
The production method of a kind of double-layer alloy composite plate, comprises the steps:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out；
(2) hollow blank after processing is uniformly heated to 1100 DEG C-1180 DEG C, carries out jumping-up with forging machine in the axial direction；
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1100 DEG C-1150 DEG C, carries out reaming with staving press；
(5) hollow blank after reaming is uniformly heated to 1150 DEG C-1230 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；
(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；
(7) arc is uniformly heated to 900 DEG C-1000 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate.
In step (1), inside and outside wall is machined as: by monolateral for the centrifugally cast hollow ingot inwall 5-10mm that machines away, the monolateral 4-8mm that machines away of outer wall, removes the defects such as the pore of inside and outside wall, shrinkage porosite.
In step (4), the external diameter 4mm-6mm less of the internal diameter of reaming cylinder under hollow blank is hot, the length after hollow blank reaming and the lenth ratio before reaming are at 1.03-1.2.Before reaming, the inner and outer wall of blank is uniform application glass dust respectively.
In step (5), the external diameter 6mm-8mm less of the internal diameter of recipient under hollow blank is hot, after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 3-12.Before extruding, the inner and outer wall of blank is uniform application glass dust respectively.
In step (1), the outer layer material of hollow blank is carbon steel, and internal layer material is rustless steel or nickel-base alloy.
Nickel-base alloy refers to the class alloy having the combination properties such as higher-strength and certain antioxidant anticorrosive ability under 650-1000 DEG C of high temperature.
The present invention adopts the hollow blank of spun casting explained hereafter multiple tube, and concrete casting cycle is as follows:
Outer layer alloys liquid is passed into spun casting in pipe die, and after having cast, cooling, when outer layer internal surface temperature is cooled to lower than outer layer alloys fusing point 30 DEG C～120 DEG C, starts inner alloy liquid of casting, cooling after having cast, and stops cooling after outer layer and internal layer all solidify.
Spun casting technique smelts outer layer and the inner alloy liquid of production tube respectively, and inner alloy is forming core, crystallization on the interface of outer layer alloys, and the combination interface of two kinds of alloys is the result that inside and outside alloy dissolves each other, and forms metallurgical melting layer.Metallurgical melting layer transition is mild, and internal layer and outer layer can reach complete metallurgical melting, and bond strength is high, and the adhesion between ectonexine alloy is 3-4 times of the adhesion of the composite plate that other method manufactures, inside and outside lamination gold not easily delamination splitting.
The thickness proportion of the two-layer alloy of double-layer alloy composite plate of the present invention can arbitrarily be allocated.
Upset forging process can improve the plasticity of centrifugal blank, the generation of crackle during pre-anti-extrusion, further increases double-layer alloy composite plate safety in utilization and life-span.
Adopt and have the beneficial effects that produced by technique scheme:
1, the present invention adopts spun casting explained hereafter hollow blank, and the two-layer alloy of alloy sheets forms metallurgical melting layer, and bond strength is high, inside and outside lamination gold not easily delamination splitting.
2, adopt upset forging process to improve the plasticity of centrifugal blank, the generation of crackle during pre-anti-extrusion, further increase double-layer alloy composite plate serviceability, safety and life-span.
Detailed description of the invention
Embodiment 1
Composite alloy plate matter is SA210-A/TP304L, outer layer material is SA210-A(carbon steel), internal layer material is TP304L(rustless steel), the chemical composition of outer layer and internal layer meets table 1 requirement, and specification is 1000mm(length) × 380mm(width) × 23mm(thickness)/(outer layer 19mm+ internal layer 4mm).
Table 1
Its production technology is:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out: the monolateral 7mm that machines away of hollow ingot inwall, the monolateral 4mm that machines away of outer wall, remove the defects such as the pore of inside and outside wall, shrinkage porosite.
(2) hollow blank after processing is uniformly heated to 1100 DEG C, carries out jumping-up with forging machine in the axial direction.Before jumping-up, the upper and lower surface of blank contacted with the upper anvil of forging machine and lower anvil uniformly perfuses glass dust.
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1140 DEG C, carries out reaming with staving press；Lenth ratio before external diameter 4mm-6mm less of the internal diameter of reaming cylinder under hollow blank is hot, the length after hollow blank reaming and reaming is 1.03.Before reaming, the inner and outer wall of blank is uniform application glass dust respectively.
(5) hollow blank after reaming is uniformly heated to 1210 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；External diameter 6mm-8mm less of the internal diameter of recipient under hollow blank is hot, after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 12.Before extruding, the inner and outer wall of blank is uniform application glass dust respectively.
(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；
(7) arc is uniformly heated to 970 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate, adhesion correction data such as table 2 of composite plate and mechanical bond plate ectonexine that the present embodiment produces:
The SA210-A/TP304L alloy sheets adhesion of table 2 different conditions compares/MPa
Embodiment 2
Composite alloy plate matter is L415QB/316L, outer layer material is L415QB(carbon steel), internal layer material is 316L(rustless steel), the chemical composition of outer layer and internal layer meets table 3 requirement, and specification is 2500mm(length) × 440mm(width) × 35mm(thickness)/(outer layer 29mm+ internal layer 6mm).
Table 3
Its production technology is:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out: the monolateral 8mm that machines away of hollow ingot inwall, the monolateral 5mm that machines away of outer wall, remove the defects such as the pore of inside and outside wall, shrinkage porosite.
(2) hollow blank after processing is uniformly heated to 1150 DEG C, carries out jumping-up with forging machine in the axial direction.Before jumping-up, the upper and lower surface of blank contacted with the upper anvil of forging machine and lower anvil uniformly perfuses glass dust.
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1120 DEG C, carries out reaming with staving press；Lenth ratio before external diameter 4mm-6mm less of the internal diameter of reaming cylinder under hollow blank is hot, the length after hollow blank reaming and reaming is 1.05.Before reaming, the inner and outer wall of blank is uniform application glass dust respectively.
(5) hollow blank after reaming is uniformly heated to 1190 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；External diameter 6mm-8mm less of the internal diameter of recipient under hollow blank is hot, after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 12.Before extruding, the inner and outer wall of blank is uniform application glass dust respectively.
(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；
(7) arc is uniformly heated to 930 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate, adhesion correction data such as table 4 of composite plate and mechanical bond plate ectonexine that the present embodiment produces:
The L415QB/316L alloy sheets adhesion of table 4 different conditions compares/MPa
Embodiment 3
Composite alloy plate matter is 20Mn2/825, outer layer material is 20Mn2(carbon steel), internal layer material is 825(nickel-base alloy), the chemical composition of outer layer and internal layer meets table 5 requirement, and specification is 3000mm(length) × 250mm(width) × 16.5mm(thickness)/(outer layer 11mm+ internal layer 5.5mm).
Table 5
Its production technology is:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out: the monolateral 10mm that machines away of hollow ingot inwall, the monolateral 6mm that machines away of outer wall, remove the defects such as the pore of inside and outside wall, shrinkage porosite.
(2) hollow blank after processing is uniformly heated to 1130 DEG C, carries out jumping-up with forging machine in the axial direction.Before jumping-up, the upper and lower surface of blank contacted with the upper anvil of forging machine and lower anvil uniformly perfuses glass dust.
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1150 DEG C, carries out reaming with staving press；Lenth ratio before external diameter 4mm-6mm less of the internal diameter of reaming cylinder under hollow blank is hot, the length after hollow blank reaming and reaming is 1.2.Before reaming, the inner and outer wall of blank is uniform application glass dust respectively.
(5) hollow blank after reaming is uniformly heated to 1230 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；External diameter 6mm-8mm less of the internal diameter of recipient under hollow blank is hot, after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 3.Before extruding, the inner and outer wall of blank is uniform application glass dust respectively.
(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；
(7) arc is uniformly heated to 1000 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate, adhesion correction data such as table 6 of composite plate and mechanical bond plate ectonexine that the present embodiment produces:
The 20Mn2/825 alloy sheets adhesion of table 6 different conditions compares/MPa
| Numbering | 1# | 2# | 3# | 4# |
| Mechanical bond plate | 110 | 80 | 102 | 66 |
| Double-layer alloy composite plate | 350 | 380 | 410 | 420 |
Embodiment 4
Composite alloy plate matter is 20Mn2/625, outer layer material is 20Mn2(carbon steel), internal layer material is 625(nickel-base alloy), the chemical composition of outer layer and internal layer meets table 7 requirement, and specification is 3500mm(length) × 600mm(width) × 30mm(thickness)/(outer layer 22mm+ internal layer 8mm).
Table 720Mn2/625 multiple tube composition/mass fraction (%)
Its production technology is:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out: the monolateral 5mm that machines away of hollow ingot inwall, the monolateral 8mm that machines away of outer wall, remove the defects such as the pore of inside and outside wall, shrinkage porosite.
(2) hollow blank after processing is uniformly heated to 1180 DEG C, carries out jumping-up with forging machine in the axial direction.Before jumping-up, the upper and lower surface of blank contacted with the upper anvil of forging machine and lower anvil uniformly perfuses glass dust.
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1100 DEG C, carries out reaming with staving press；Lenth ratio before external diameter 4mm-6mm less of the internal diameter of reaming cylinder under hollow blank is hot, the length after hollow blank reaming and reaming is 1.05.Before reaming, the inner and outer wall of blank is uniform application glass dust respectively.
(5) hollow blank after reaming is uniformly heated to 1150 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；External diameter 6mm-8mm less of the internal diameter of recipient under hollow blank is hot, after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 8.Before extruding, the inner and outer wall of blank is uniform application glass dust respectively.
(6) double-layer alloy multiple tube is prolonged axis direction and cut into arc；
(7) arc is uniformly heated to 900 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate, adhesion correction data such as table 8 of composite plate and mechanical bond plate ectonexine that the present embodiment produces:
The 20Mn2/625 alloy sheets adhesion of table 8 different conditions compares/MPa
| Numbering | 1# | 2# | 3# | 4# |
| Mechanical bond plate | 109 | 126 | 140 | 130 |
| Double-layer alloy composite plate | 420 | 398 | 445 | 397 |
Claims (3)
1. the production method of a double-layer alloy composite plate, it is characterised in that it comprises the steps:
(1) use spun casting explained hereafter double-layer alloy composite hollow blank, and the inside and outside wall of hollow blank is machined out；
(2) hollow blank after processing is uniformly heated to 1100 DEG C-1180 DEG C, carries out jumping-up with forging machine in the axial direction；
(3) with ring rolls, the blank after jumping-up is carried out rolloff, recover cylinder；
(4) hollow blank after rolloff is uniformly heated to 1100 DEG C-1150 DEG C, carries out reaming with staving press；
(5) hollow blank after reaming is uniformly heated to 1150 DEG C-1230 DEG C, adopts extruder to extrude, obtain double-layer alloy multiple tube；
(6) double-layer alloy multiple tube is cut into arc in the axial direction；
(7) arc is uniformly heated to 900 DEG C-1000 DEG C, then offsets with mangle, namely obtain double-layer alloy composite plate；
In described step (1), inside and outside wall is machined as: by monolateral for the centrifugally cast hollow ingot inwall 5-10mm that machines away, outer wall is monolateral machines away 4-8mm；
In described step (1), the internal layer material of hollow blank is rustless steel or nickel-base alloy, and outer layer material is carbon steel；
The concrete casting cycle of spun casting technique is as follows:
Outer layer alloys liquid is passed into spun casting in pipe die, and after having cast, cooling, when outer layer internal surface temperature is cooled to lower than outer layer alloys fusing point 30 DEG C～120 DEG C, starts inner alloy liquid of casting, cooling after having cast, and stops cooling after outer layer and internal layer all solidify.
2. the lenth ratio before the production method of double-layer alloy composite plate according to claim 1, it is characterised in that in described step (4), the length after hollow blank reaming and reaming is at 1.03-1.2.
3. the production method of double-layer alloy composite plate according to claim 1, it is characterised in that in described step (5), after hot extrusion, before the length of double-layer alloy multiple tube and hot extrusion, the lenth ratio of double-layer alloy composite pipe blank is 3-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310448263.4A CN103495840B (en) | 2013-09-27 | 2013-09-27 | The production method of double-layer alloy composite plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310448263.4A CN103495840B (en) | 2013-09-27 | 2013-09-27 | The production method of double-layer alloy composite plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103495840A CN103495840A (en) | 2014-01-08 |
| CN103495840B true CN103495840B (en) | 2016-06-29 |
Family
ID=49861148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310448263.4A Active CN103495840B (en) | 2013-09-27 | 2013-09-27 | The production method of double-layer alloy composite plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103495840B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104907773A (en) * | 2015-06-05 | 2015-09-16 | 邯郸新兴特种管材有限公司 | Production method for avoiding inner wall cracks of double-layer alloy composite pipe |
| CN110773713B (en) * | 2019-09-29 | 2021-10-22 | 鞍钢股份有限公司 | Method for preparing composite metal plate by centrifugal casting |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3813758A (en) * | 1970-12-15 | 1974-06-04 | Nippon Oils & Fats Co Ltd | Explosive welding process |
| CN101239382A (en) * | 2008-03-12 | 2008-08-13 | 成都利君科技有限责任公司 | Abrasion-proof composite roller, board and manufacturing method thereof |
| CN102310184A (en) * | 2011-09-27 | 2012-01-11 | 新兴铸管股份有限公司 | Manufacturing method of wear-resistant composite steel plate and manufactured composite steel plate |
| CN102581210A (en) * | 2012-01-12 | 2012-07-18 | 太原科技大学 | Forging method for thermoforming cylindrical forging by using hollow casting blank |
-
2013
- 2013-09-27 CN CN201310448263.4A patent/CN103495840B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3813758A (en) * | 1970-12-15 | 1974-06-04 | Nippon Oils & Fats Co Ltd | Explosive welding process |
| CN101239382A (en) * | 2008-03-12 | 2008-08-13 | 成都利君科技有限责任公司 | Abrasion-proof composite roller, board and manufacturing method thereof |
| CN102310184A (en) * | 2011-09-27 | 2012-01-11 | 新兴铸管股份有限公司 | Manufacturing method of wear-resistant composite steel plate and manufactured composite steel plate |
| CN102581210A (en) * | 2012-01-12 | 2012-07-18 | 太原科技大学 | Forging method for thermoforming cylindrical forging by using hollow casting blank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103495840A (en) | 2014-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103736729B (en) | The method of metal clad plate strip is prepared in a kind of rolling | |
| CN102294456B (en) | Manufacturing method for oblique rolling of bimetallic compound seamless steel pipe by centrifugal blank | |
| CN106583491A (en) | Method for manufacturing Cr-Ni-Mo-Nb nickel base alloy seamless tube | |
| CN104259353B (en) | A kind of complex thin-wall alloy special-shaped titanium ring forging forming method | |
| CN107649531A (en) | A kind of processing method of titanium alloy large-calibre seamless thin-wall pipes | |
| CN102873098B (en) | Manufacturing method for ultrathin-wall titanium tubing | |
| CN102909237B (en) | A kind of preparation method of TA18 thick-wall tube | |
| CN102489952A (en) | Method for manufacturing titanium alloy thick-wall pressure-resistant cylinder body | |
| CN109604337B (en) | Preparation method of micron-sized niobium foil | |
| CN104384859A (en) | Production method for nickel base alloy N06625 composite seamless steel pipe | |
| CN110293149B (en) | Manufacturing device and manufacturing method of bimetal composite capillary | |
| CN104668305A (en) | Method for molding dual-layer alloy-steel pipe | |
| CN103495840B (en) | The production method of double-layer alloy composite plate | |
| CN102773303A (en) | Copper nickel alloy large-size thick-wall seamless pipe manufacturing process | |
| CN102274853A (en) | Process for manufacturing hot-rolled composite corrosion-resistance double-metal steel tube | |
| CN110961515A (en) | Titanium alloy thin-wall cylinder forming method | |
| CN104889163B (en) | A kind of method of pure titanium seamless tubes roll piercing | |
| CN104759849A (en) | Manufacturing method for flange component for controlling automobile exhaust | |
| CN1330436C (en) | Method for making soldered hot-rolled composite metal tube | |
| CN107914439B (en) | Assembly structure and method for rolling titanium composite steel plate by vacuum blank making | |
| CN104785572A (en) | Manufacturing method of antirust aluminum alloy flat tube for water tank and air conditioner condenser of automobile | |
| CN104307921A (en) | Seamless steel tube production process | |
| CN102445105A (en) | Alloy abnormal shaped flow collection pipe for heat exchanger and manufacture method of same | |
| CN103286154B (en) | Manufacturing method of GH3600 nickel alloy extruded tube | |
| CN105458004A (en) | Low-plastic difficult-to-deform material slab rolling method and mold based on detachable cover |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |