CN116804244A - Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part - Google Patents
Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part Download PDFInfo
- Publication number
- CN116804244A CN116804244A CN202310604769.3A CN202310604769A CN116804244A CN 116804244 A CN116804244 A CN 116804244A CN 202310604769 A CN202310604769 A CN 202310604769A CN 116804244 A CN116804244 A CN 116804244A
- Authority
- CN
- China
- Prior art keywords
- sheet metal
- metal part
- welding
- plate
- adopting
- 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.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 66
- 239000002184 metal Substances 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 34
- 230000032683 aging Effects 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 77
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 74
- 229910052786 argon Inorganic materials 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 13
- 230000035882 stress Effects 0.000 claims description 12
- 238000012360 testing method Methods 0.000 claims description 11
- 238000004321 preservation Methods 0.000 claims description 9
- 230000004323 axial length Effects 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000003754 machining Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 5
- 238000005461 lubrication Methods 0.000 claims description 5
- 238000012795 verification Methods 0.000 claims description 5
- 210000004907 gland Anatomy 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 3
- 230000018109 developmental process Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000035515 penetration Effects 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 238000007654 immersion Methods 0.000 claims description 2
- 238000007542 hardness measurement Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 14
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000005204 segregation Methods 0.000 abstract description 4
- 239000006104 solid solution Substances 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 8
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000005498 polishing Methods 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000003698 laser cutting Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000601 superalloy Inorganic materials 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The application provides a sheet material for preparing a sheet metal part with a thin-wall rotary body structure and a preparation method of the sheet metal part, and belongs to the technical fields of material application and aviation manufacturing. The sheet material comprises: c:0.010 to 0.035 percent, cr:17.00% -21.00%, mo:2.80% -3.30%, nb:4.70 to 5.20 percent of Ti:0.75 to 1.15 percent of Al:0.30 to 0.70 percent of Ni:50.00% -55.00% of Fe and the balance. The plate has reasonable component proportion, strictly controls the content of C, nb element therein, ensures that the plate has good plastic forming process performance due to the component limitation of C, does not generate carbide segregation bands, ensures good structural performance uniformity, ensures that the solid solution state plate has good forming process performance due to the limitation of Nb, and has higher strength and fatigue resistance after aging.
Description
Technical Field
The application belongs to the technical field of material application and aviation manufacturing, and particularly relates to a sheet metal part with a thin-wall rotary structure and a preparation method of the sheet metal part.
Background
The sheet metal part is a part processed by using a plate as a raw material. Compared with forging castings and machined parts, the sheet metal part has the advantages of light structure weight, easiness in forming, high processing efficiency, low cost and the like, and is widely applied to mechanical products such as aeroengines and the like. Important sheet metal parts in the aeroengine mainly comprise a heat insulation sleeve, a front-disk guide plate, a casing and the like, most of the parts are of a thin-wall rotary body structure, the barrel is complex in molded surface, and the axial size is large. The sheet metal parts have high working temperature in an aeroengine, bear loads such as internal and external cavity pressure, vibration stress and the like, and have high requirements on strength, high temperature resistance, dimensional accuracy and the like of materials.
In order to meet the use requirement, sheet metal parts in aeroengines are mostly manufactured by adopting high-temperature-resistant high-strength nickel-based or cobalt-based superalloy plates. The high-temperature alloy plate, especially the aging strengthening high-temperature alloy plate, has high strength, high toughness and high molding difficulty, the molding process is a complex deformation process under the action of multiple parameters, and the material is subjected to uneven deformation, so that the defects of rebound, wrinkling, thinning, damage, cracking and the like are easy to occur. The forming evolution of the sheet metal part is a highly nonlinear time-varying complex process, is not only affected by interaction of a plurality of forming parameters such as a sheet material, a die, a process and the like, but also has strong genetic influence on the follow-up forming state and the follow-up result. In the actual production process, forming defects such as wrinkling, cracking, unqualified weld quality, ultra-poor dimensional accuracy and the like are easy to occur when the nickel-based superalloy sheet metal part is prepared.
The cylinder body of the sheet metal part with the thin-wall rotary body structure can be formed by adopting a multi-pass integral drawing or integral spinning process, but the process is difficult, a plurality of sets of special dies and tools are needed, the investment of the early stage is high, and the period is long. When the sheet metal part is still in the research and development stage of structure adjustment or the production batch is smaller, the sheet metal part is not suitable to be formed by adopting an integral drawing or integral spinning process.
Therefore, a sheet material suitable for a sheet metal part with a thin-wall rotary body structure and a preparation method thereof are needed.
Disclosure of Invention
In order to solve the problems, the application aims to provide a sheet material for preparing a sheet metal part with a thin-wall rotary structure, which is subjected to solution treatment and strictly controls the C, nb element content, the grain size and the hardness, and has good forming process performance and welding performance, and can have high strength after aging treatment.
In order to achieve the above purpose, the application provides a plate for preparing a sheet metal part with a thin-wall revolution body structure, which comprises the following technical scheme: c:0.010 to 0.035 percent, cr:17.00% -21.00%, mo:2.80% -3.30%, nb:4.70% -5.20%, T i:0.75% -1.15%, A l:0.30 to 0.70 percent of Ni:50.00% -55.00% of Fe and the balance.
The plate for preparing the thin-wall revolving body structure sheet metal part provided by the application also has the technical characteristics that the grain size of the plate is smaller than 7, and the Rockwell hardness of the plate is not more than 100HRB.
Another object of the present application is to provide a method for manufacturing a sheet metal part of thin-walled revolution structure using a sheet metal part as defined in any of the preceding claims.
The preparation method provided by the application also has the following technical characteristics that the preparation method comprises the following steps:
s1: pretreating the plate;
s2: carrying out preformed rolling on the pretreated plate to form a cylinder body, and carrying out argon arc welding on the joint of the cylinder body;
s3: carrying out stress relief heat treatment to eliminate residual stress generated in the step S2;
s4: the cylinder body subjected to stress-relief heat treatment is subjected to expansion and correction by adopting an expansion die on a hydraulic press to prepare a sheet metal part in the shape of a revolving body;
s5: performing profile processing on the sheet metal part in the shape of the revolving body;
s6: and (5) performing processing and verification after aging treatment to obtain the sheet metal part with the thin-wall rotary structure.
The preparation method provided by the application also has the following technical characteristics that the sheet material in S1 is a sheet material formed by cold rolling,
the pretreatment comprises the steps of adopting grease to carry out lubrication treatment after solution treatment,
the temperature of the solution treatment is 960-990 ℃, the heat preservation time after metal heat penetration is 3-10 min, and the cooling mode is air cooling.
The preparation method provided by the application has the following technical characteristics that in the step S2, a preformed tool is adopted on a triaxial roller machine to roll the pretreated plate into a cylinder shape.
The preparation method provided by the application also has the following technical characteristics that the argon arc welding step in the S2 is as follows:
A. surface cleaning is carried out on the welding part within the range of 15 mm-20 mm;
B. clamping the cylindrical plate on a welding fixture, tightening a fastening device of the welding fixture, and pressing a gland, so as to ensure that the assembly gap and the error are not more than 0.1mm;
C. performing spot welding positioning, wherein the welding spot spacing is 6-8 mm;
D. argon arc welding is carried out along the direction of the bus, and when the argon arc welding is carried out, the high-frequency attenuation time is increased, so that the joint is full, and then the attenuation arc is carried out;
E. and (3) unloading the tubular plate subjected to argon arc welding after complete cooling, checking the appearance of the welding seam by adopting a 5-time magnifying glass, checking the size of the welding seam by adopting a caliper, checking the surface quality of the welding seam by adopting fluorescence, checking the internal quality of the welding seam by adopting X-rays, and repairing welding the part of which the quality of the welding seam does not meet the requirement.
The preparation method provided by the application has the technical characteristics that the working pressure of the stress relief heat treatment in the step S3 is not higher than 0.10Pa, the heating temperature is 940-980 ℃, the heat preservation time is 2-20 min, and argon is filled for cooling.
The preparation method provided by the application has the following technical characteristics that when the deep drawing method is adopted in the S5 medium-sized noodle processing, the deep drawing ratio is smaller than 1.8.
The preparation method provided by the application also has the following technical characteristics, and the S6 comprises the following steps:
s6.1: aging treatment is carried out at an operating pressure of not more than 0.10 Pa;
s6.2: machining the sheet metal part;
s6.3: the part is inspected for cylinder diameter, axial length and thick wall.
The preparation method provided by the application also has the following technical characteristics that the S6.1 comprises the following steps:
s6.1.1: preserving heat for 8h at 720 ℃;
s6.1.2: cooling to 620 ℃ at a rate of 50 ℃/h;
s6.1.3: preserving heat for 8.5h at 620 ℃;
s6.1.4: and (3) charging argon gas, cooling to 50 ℃, and discharging from the furnace, wherein the pressure of the argon gas is 0.2-0.4 MPa.
The preparation method provided by the application also has the following technical characteristics,
the S6.3 further comprises performing a fluorescent test and a hardness test on the part,
during fluorescent inspection, the immersion time of the fluorescent penetrating fluid is 5-10 min; the development time is 20 min-40 min,
the hardness test is carried out by using a Rockwell hardness tester,
the hardness test of the part is not lower than 38HRC.
The beneficial effects are that:
the component proportion in the sheet material for preparing the sheet metal part with the thin-wall rotary structure is reasonable, the C, nb element content is strictly controlled, the component limitation of C ensures that the sheet material has good plastic forming process performance, carbide segregation bands do not appear, good tissue performance uniformity is ensured, the limitation of Nb ensures that the solid solution state sheet material has good forming process performance, and the sheet material has higher strength and fatigue resistance after aging.
The sheet metal part prepared by the preparation method provided by the application has very high strength and high temperature resistance, the room-temperature tensile strength Rm can reach over 1250MPa, the 650 tensile strength Rm can reach over 1000MPa, the long-term use temperature can reach 650 ℃, and the highest use temperature can reach 800 ℃.
The sheet metal part prepared by the preparation method provided by the application has high precision, the wall thickness precision of the part can be within +/-6.5%, the radial dimension precision can be within +/-0.4 mm, the axial dimension precision can be within +/-0.2 mm, and the surface roughness can be up to Ra0.05.
The preparation method provided by the application has the advantages of short production period, low cost and high material utilization rate, and can be used for preparing parts with complex barrel profiles and larger axial sizes, such as the aeroengine heat insulation sleeve, the front-disc guide plate, the casing and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a sheet metal part of a conical cylinder provided in embodiment 1 of the present application;
FIG. 2 shows the grain size of the sheet material used in example 1 of the present application;
fig. 3 is a schematic structural view of a sheet metal part of a front-disk baffle according to embodiment 2 of the present application;
FIG. 4 shows the grain size of the sheet material used in example 2 of the present application;
fig. 5 is a schematic drawing showing the pre-stretching process of the sheet metal part of the pre-tray baffle according to embodiment 2 of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, but it should be understood that these embodiments are not limiting, and functional, method, or structural equivalents or alternatives according to these embodiments are within the scope of protection of the present application.
In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the application.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the creation of the present application can be understood by those of ordinary skill in the art in a specific case.
The embodiment of the application provides a plate for preparing a sheet metal part with a thin-wall rotary structure, which comprises the following components: c:0.010 to 0.035 percent, cr:17.00% -21.00%, mo:2.80% -3.30%, nb:4.70% -5.20%, T i:0.75% -1.15%, A l:0.30% -0.70%, N i:50.00% -55.00% of Fe and the balance.
Wherein, C is carbide forming element in the plate, and the carbide can play a role of strengthening grain boundary. With the increase of the C content, the work hardening index of the alloy can be reduced while the strength of the plate is improved, which is not beneficial to the plastic forming performance of the plate, in addition, MC type carbide can be greatly precipitated after the carbon content is increased, a carbide segregation belt is formed in the subsequent deformation process, the uniformity of the tissue performance is deteriorated, and when the C range is limited in the range of 0.015-0.04%, the plate is ensured to have good plastic forming process performance, the carbide segregation belt is not generated, and the good uniformity of the tissue performance is ensured. Nb is an important strengthening element in the sheet and forms carbide and gamma strengthening phases. The Nb content is reduced, so that the work hardening index of the solid-solution state plate can be improved, the plate has good uniform plastic deformation capability, but the strength and fatigue resistance of the aged plate are insufficient when the Nb content is too low, so that the solid-solution state plate can be ensured to have excellent forming technological properties when the Nb content is controlled within the range of 4.75-5.25%, and the aged plate has satisfactory strength and fatigue resistance.
In some embodiments, the sheet has a grain size finer than 7 and a Rockwell hardness of no greater than 100HRB.
In some embodiments, the method of making uses a sheet material as described in any one of the preceding claims.
In some embodiments, the preparation method comprises the steps of:
s1: pretreating the plate;
s2: carrying out preformed rolling on the pretreated plate to form a cylinder body, and carrying out argon arc welding on the joint of the cylinder body;
s3: carrying out stress relief heat treatment to eliminate residual stress generated in the step S2;
s4: the cylinder body subjected to stress-relief heat treatment is subjected to expansion and correction by adopting an expansion die on a hydraulic press to prepare a sheet metal part in the shape of a revolving body;
s5: performing profile processing on the sheet metal part in the shape of the revolving body;
s6: and (5) performing processing and verification after aging treatment to obtain the sheet metal part with the thin-wall rotary structure.
In some embodiments, the sheet material in S1 is a cold-rolled sheet material,
the pretreatment comprises the steps of adopting grease to carry out lubrication treatment after solution treatment,
the temperature of the solution treatment is 960-990 ℃, the heat preservation time after metal heat penetration is 3-10 min, and the cooling mode is air cooling.
The preparation method provided by the application has the following technical characteristics that in the step S2, a preformed tool is adopted on a triaxial roller machine to roll the pretreated plate into a cylinder shape.
In some embodiments, the argon arc welding in S2 includes the following steps:
A. surface cleaning is carried out on the welding part within the range of 15 mm-20 mm;
B. clamping the cylindrical plate on a welding fixture, tightening a fastening device of the welding fixture, and pressing a gland, so as to ensure that the assembly gap and the error are not more than 0.1mm;
C. performing spot welding positioning, wherein the welding spot spacing is 6-8 mm;
D. argon arc welding is carried out along the direction of the bus, and when the argon arc welding is carried out, the high-frequency attenuation time is increased, so that the joint is full, and then the attenuation arc is carried out;
E. and (3) unloading the tubular plate subjected to argon arc welding after complete cooling, checking the appearance of the welding seam by adopting a 5-time magnifying glass, checking the size of the welding seam by adopting a caliper, checking the surface quality of the welding seam by adopting fluorescence, checking the internal quality of the welding seam by adopting X-rays, and repairing welding the part of which the quality of the welding seam does not meet the requirement.
In some embodiments, the working pressure of the destressing heat treatment in the step S3 is not higher than 0.10Pa, the heating temperature is 940-980 ℃, the heat preservation time is 2-20 min, and argon is filled for cooling.
In some embodiments, the S5 middle-sized dough is processed by a drawing method, wherein the drawing ratio is less than 1.8.
In some embodiments, the step S6 includes the steps of:
s6.1: aging treatment is carried out at an operating pressure of not more than 0.10 Pa;
s6.2: machining the sheet metal part;
s6.3: the part is inspected for cylinder diameter, axial length and thick wall.
In some embodiments, the step S6.1 includes the steps of:
s6.1.1: preserving heat for 8h at 720 ℃;
s6.1.2: cooling to 620 ℃ at a rate of 50 ℃/h;
s6.1.3: preserving heat for 8.5h at 620 ℃;
s6.1.4: and (3) charging argon gas, cooling to 50 ℃, and discharging from the furnace, wherein the pressure of the argon gas is 0.2-0.4 MPa.
In some embodiments, S6.3 further comprises performing a fluorescent test and a hardness test on the part,
in the fluorescent inspection, the retention time of the fluorescent penetrating fluid is 20min, wherein the dipping time in the retention process is 5-10 min; the development time is 20 min-40 min,
the hardness test is carried out by using a Rockwell hardness tester,
the hardness test of the part is not lower than 38HRC.
Example 1:
the sheet material and the preparation method provided by the application are used for preparing the thin-wall revolving body sheet metal part shown in figure 1, wherein the diameter of the large section of the structure is phi 402.7 (0, -0.4) mm, the diameter of the small end is phi 376.5 (+0.2, -0.2) mm, the axial length is 56.1 (+0.3, 0) mm, and the wall thickness is 1.0 (+0.063, -0.063) mm.
The chemical composition of the sheet used in this example was: c:0.029%, cr:17.87%, mo:3.04%, nb:5.04%, ti:1.01%, al:0.52%, ni:54.06% and the balance of Fe. The thickness of the plate is delta 1.0mm.
The preparation method comprises the following steps:
s1: the method comprises the following steps of (1) preprocessing a plate:
s1.1: cold rolling and shaping the plate, carrying out solution treatment at 980 ℃, preserving heat for 4 min after metal is thoroughly heated, discharging, cooling by air, and carrying out acid washing and polishing treatment, wherein the length of the plate is 2002mm, the width is 1001mm, the thickness is 0.963-1.013 mm, the grain size is 8.5 grade, and the hardness is 94HRB;
s1.2: according to the calculated size, reserving a machining allowance of 3mm on a single side, finishing plate blanking and cleaning by adopting a laser cutting mode, keeping the surface clean and free of foreign matters and scratches, and adopting grease for lubrication treatment;
s2: carrying out preformed rounding on the sheet metal part on the pretreated sheet metal, and carrying out argon arc welding:
s2.1: rolling a cylindrical primary form on a triaxial rolling machine by adopting a preformed tool, wherein the two sides which are required to be in butt joint by argon arc welding are kept with flat sections of 20-30 mm, and the rest parts are arc-shaped;
s2.2: argon arc welding is carried out on the rolled cylinder body primary edge bus by adopting filler wire argon arc welding, and the concrete steps are as follows:
A. polishing and cleaning the welding part within 15mm to expose metallic luster, and not allowing any dirt to exist in the area to be welded;
B. clamping a cylindrical plate on a welding fixture, tightening a fastening device of the fixture, compressing a gland, ensuring that the assembly gap and the error are not more than 0.1mm, and checking and confirming the assembly gap by adopting a feeler gauge;
C. spot welding and positioning are carried out according to the interval of 6 mm;
D. automatic argon arc welding is carried out along the bus direction, the welding wire material is the same as the plate material, the diameter is 1.2mm, the tungsten electrode diameter is 1.5mm, the welding current is 40A, the argon flow is 10L/min, and when the argon arc welding is carried out, the high-frequency attenuation time is increased, so that the joint is fully filled and then the arc is attenuated;
E. unloading the part after complete cooling, checking the appearance of the welding seam by adopting a 5-time magnifying glass, checking the size of the welding seam by adopting a caliper, checking the surface quality of the welding seam by adopting fluorescence, checking the internal quality of the welding seam by adopting X-rays, and repairing welding the part of which the quality of the welding seam does not meet the requirement;
s3: carrying out stress-relief heat treatment to eliminate residual stress generated in the step S2, wherein the vacuum degree is 0.05Pa, the heating temperature is 960 ℃, the heat preservation time is 5min, and then filling argon into a heat treatment furnace for cooling;
s4: the cylinder body subjected to stress relief heat treatment is subjected to expansion by adopting an expansion die on a hydraulic press, wherein the expansion die is of a block structure and is composed of 8 blocks. The expansion pressure is slowly and stably applied, the cylinder body material is uniformly deformed, the size of the cylinder body material is checked, and the part which does not meet the precision requirement is further corrected;
s5: profile processing is carried out on the sheet metal part in the shape of the revolving body: the large end and the small end of the sheet metal part are provided with profile changes near, namely, the circle in fig. 1 shows that the parts are processed by adopting a spinning process. Before spinning, a roller with reasonable round corners is selected, the surface of the formed part is smooth, the quality problems of orange peel, wrinkling, overlarge corrugation and the like are avoided, the spun part is fully attached to a die, and the wall thickness of a profile change part is reduced within 0.03 mm;
s6: and (3) performing processing and verification after aging treatment to obtain the sheet metal part with the thin-wall rotary body structure, wherein the sheet metal part is specifically as follows:
s6.1: aging treatment is carried out at an operating pressure of not more than 0.05 Pa:
s6.1.1: preserving heat for 8h at 720 ℃;
s6.1.2: cooling to 620 ℃ at a rate of 50 ℃/h;
s6.1.3: preserving heat for 8.5h at 620 ℃;
s6.1.4: argon with the pressure of 0.2-0.4 MPa is filled into the furnace, cooled to 50 ℃ and discharged from the furnace;
s6.2: turning the sheet metal part, and machining bolt holes, ventilation grooves and the like on the cylinder wall;
s6.3: the diameter, the axial length and the thick wall of the cylinder body of the part are tested, the axial length is 56.16mm, the diameter of the large end is 402.51mm, the diameter of the small end is 376.62mm, the wall thickness of different parts is 0.945-1.011 mm, the widths of different parts of the welding line are 5.0-5.8 mm, the residual height of the front surface of the welding line is less than 0.1mm, the residual height of the back surface is less than 0.5mm, and the number and the size of defects at the welding line can meet the I-level welding line requirement in HB 5456 through fluorescent and X-ray test, so that the hardness of the part reaches 45HRC.
Example 2
As shown in figures 3-5, the sheet material and the preparation method provided by the application are used for preparing the sheet metal part of the front-disc guide plate shown in figure 3, wherein the maximum outer diameter of the sheet metal part is phi 475mm, the circumferential surface of the sheet metal part with the maximum outer diameter is a hat peak structure with a certain radian, and the most external circular tangent line of the hat peak forms an included angle of 45 degrees with the axial direction (normal line) of the part. The inner diameter of the shallow cylinder is phi 327mm, the axial height of the guide plate is 105mm, and the wall thickness is 0.8 (+0.056, -0.056) mm.
The chemical composition of the sheet used in this example was: c:0.031%, cr:17.94%, mo:2.99%, nb:5.12%, T i:1.00%, A l:0.51%, N i:53.98% and the balance of Fe. The thickness of the plate is delta 0.8mm.
The preparation method comprises the following steps:
s1: the method comprises the following steps of (1) preprocessing a plate:
s1.1: cold rolling and shaping the plate, carrying out solution treatment at 980 ℃, preserving heat for 3min after metal is thoroughly heated, discharging, cooling by air, and carrying out acid washing and polishing treatment, wherein the length of the plate is 2003mm, the width is 1001mm, the thickness is 0.758-0.827mm, the grain size is 8 grades, and the hardness is 93HRB;
s1.2: according to the calculated size, reserving a machining allowance of 3mm on a single side, finishing plate blanking and cleaning by adopting a laser cutting mode, keeping the surface clean and free of foreign matters and scratches, and adopting grease for lubrication treatment;
the guide plate structure before the dish includes 1 number piece and 2 number piece, welds 1 number piece and 2 number piece into guide plate part before the dish through a circumferential argon arc welding seam, and processing procedure after the panel preliminary treatment is 1 number piece and 2 number piece have certain differences, and its separate description below.
For part 1, the following steps use the technical scheme as described in the application:
s2: carrying out preformed rounding of a sheet metal part on the pretreated plate, and carrying out argon arc welding along a bus;
s3: carrying out vacuum stress-relief heat treatment to eliminate residual stress generated in the step S2;
s4: the cylinder body subjected to stress-relief heat treatment is subjected to expansion and correction by adopting an expansion die on a hydraulic press to prepare a sheet metal part in the shape of a revolving body;
s5: performing profile processing on the sheet metal part in the shape of the revolving body;
s6: and (5) performing processing and verification after aging treatment to obtain the sheet metal part with the thin-wall rotary structure.
For part 2, the subsequent steps include:
deburring, varnish coating, prestretching, bottom hole cutting, inner hole polishing, cleaning, deep drawing, paint removing, stress removing heat treatment, varnish coating, correction, excircle cutting, correction and deep drawing, vehicle height,
the stress-relieving heat treatment system of the No. 1 piece and the No. 2 piece is as follows: vacuum degree is 0.05Pa, heating temperature is 940 ℃, heat preservation time is 3min, and argon is filled into the furnace for cooling.
The vacuum aging treatment system of the welding assembly is as follows: the pressure in the furnace is below 0.05Pa, the part is firstly kept at 720 ℃ for 8 hours, then is cooled to 620 ℃ at the speed of 50 ℃/h, and is kept at 620 ℃ for 8.5 hours. After the heat preservation is finished, argon with the pressure of (0.2-0.4) MPa is filled into the furnace, and the furnace is cooled to below 50 ℃ and then is discharged.
Finally, the important dimensions of the cylinder body diameter, axial length, wall thickness and the like of the part are tested, wherein the axial length is 105.08mm, the inner diameter is 326.87mm, the maximum outline outer diameter is 475.18mm, and the wall thickness of different parts is 0.746-0.825 mm. The widths of different parts of the welding line are between 4.1mm and 4.7mm, the residual height of the front surface of the welding line is less than 0.1mm, and the residual height of the back surface is less than 0.4mm. Through fluorescent and X-ray inspection, the number and the size of defects at the welding seam can meet the I-level welding seam requirement in HB 5456, and the hardness of the part reaches 46HRC.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application. The foregoing is merely a preferred embodiment of the present application, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present application, and these modifications and variations should also be regarded as the scope of the application.
Claims (12)
1. A sheet material for preparing a sheet metal component of a thin-walled solid of revolution structure, the sheet material comprising: c:0.010 to 0.035 percent, cr:17.00% -21.00%, mo:2.80% -3.30%, nb:4.70 to 5.20 percent of Ti:0.75 to 1.15 percent of Al:0.30 to 0.70 percent of Ni:50.00% -55.00% of Fe and the balance.
2. The sheet material for manufacturing a sheet metal part of a thin-walled revolution structure according to claim 1, wherein the sheet material has a grain size finer than 7 and a rockwell hardness of not more than 100HRB.
3. A method for manufacturing a sheet metal part of a thin-walled revolution structure, characterized in that the method uses a sheet material according to any of claims 1-2.
4. A method of preparation according to claim 3, characterized in that the method of preparation comprises the steps of:
s1: pretreating the plate;
s2: carrying out preformed rolling on the pretreated plate to form a cylinder body, and carrying out argon arc welding on the joint of the cylinder body;
s3: carrying out stress relief heat treatment to eliminate residual stress generated in the step S2;
s4: the cylinder body subjected to stress-relief heat treatment is subjected to expansion and correction by adopting an expansion die on a hydraulic press to prepare a sheet metal part in the shape of a revolving body;
s5: performing profile processing on the sheet metal part in the shape of the revolving body;
s6: and (5) performing processing and verification after aging treatment to obtain the sheet metal part with the thin-wall rotary structure.
5. The method according to claim 4, wherein the sheet in S1 is a cold-rolled sheet,
the pretreatment comprises the steps of adopting grease to carry out lubrication treatment after solution treatment,
the temperature of the solution treatment is 960-990 ℃, the heat preservation time after metal heat penetration is 3-10 min, and the cooling mode is air cooling.
6. The method according to claim 4, wherein the pre-treated plate is rolled into a cylinder by a pre-forming tool on a three-axis rolling machine in the step S2.
7. The method according to claim 4, wherein the argon arc welding in S2 comprises the steps of:
A. surface cleaning is carried out on the welding part within the range of 15 mm-20 mm;
B. clamping the cylindrical plate on a welding fixture, tightening a fastening device of the welding fixture, and pressing a gland, so as to ensure that the assembly gap and the error are not more than 0.1mm;
C. performing spot welding positioning, wherein the welding spot spacing is 6-8 mm;
D. argon arc welding is carried out along the direction of the bus, and when the argon arc welding is carried out, the high-frequency attenuation time is increased, so that the joint is full, and then the attenuation arc is carried out;
E. and (3) unloading the tubular plate subjected to argon arc welding after complete cooling, checking the appearance of the welding seam by adopting a 5-time magnifying glass, checking the size of the welding seam by adopting a caliper, checking the surface quality of the welding seam by adopting fluorescence, checking the internal quality of the welding seam by adopting X-rays, and repairing welding the part of which the quality of the welding seam does not meet the requirement.
8. The method according to claim 4, wherein the working pressure of the destressing heat treatment in the step S3 is not higher than 0.10Pa, the heating temperature is 940-980 ℃, the heat preservation time is 2-20 min, and argon is filled for cooling.
9. The method according to claim 4, wherein the S5 middle-sized dough is processed by a drawing method, and the drawing ratio is less than 1.8.
10. The method according to claim 4, wherein S6 comprises the steps of:
s6.1: aging treatment is carried out at an operating pressure of not more than 0.10 Pa;
s6.2: machining the sheet metal part;
s6.3: the part is inspected for cylinder diameter, axial length and thick wall.
11. The method according to claim 10, wherein S6.1 comprises the steps of:
s6.1.1: preserving heat for 8h at 720 ℃;
s6.1.2: cooling to 620 ℃ at a rate of 50 ℃/h;
s6.1.3: preserving heat for 8.5h at 620 ℃;
s6.1.4: and (3) charging argon gas, cooling to 50 ℃, and discharging from the furnace, wherein the pressure of the argon gas is 0.2-0.4 MPa.
12. The method of claim 10, wherein S6.3 further comprises performing a fluorescent test and a hardness test on the part,
during fluorescent inspection, the immersion time of the fluorescent penetrating fluid is 5-10 min; the development time is 20 min-40 min,
hardness testing was performed using a Rockwell hardness tester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310604769.3A CN116804244A (en) | 2023-05-26 | 2023-05-26 | Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310604769.3A CN116804244A (en) | 2023-05-26 | 2023-05-26 | Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116804244A true CN116804244A (en) | 2023-09-26 |
Family
ID=88080228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310604769.3A Pending CN116804244A (en) | 2023-05-26 | 2023-05-26 | Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116804244A (en) |
-
2023
- 2023-05-26 CN CN202310604769.3A patent/CN116804244A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018077067A1 (en) | Steel welding component with aluminum or aluminum alloy coating, and preparation method therefor | |
| CN102489952B (en) | Method for manufacturing titanium alloy thick-wall pressure-resistant cylinder body | |
| CN110369669B (en) | Forging process of aviation compressor blade based on stainless steel material | |
| CN107138924A (en) | A kind of bimetallic dual-property titanium alloy blisk manufacture method | |
| EP2774716A2 (en) | Method of producing a hollow airfoil | |
| CN112059531B (en) | Method for repairing defects of precision investment casting for liquid rocket engine | |
| CN113681103B (en) | Multi-brazing and heat treatment process for maintaining strength of nickel-based high-temperature alloy | |
| CN112108597B (en) | Deformed high-temperature alloy blade forging and precision forging method thereof | |
| CN116804244A (en) | Sheet material for preparing sheet metal part with thin-wall revolution body structure and preparation method of sheet metal part | |
| CN115091022B (en) | Crack repairing and micro-additive method based on friction stir welding | |
| CN114799395B (en) | Vacuum brazing method for dissimilar nickel-based high-temperature alloy for improving strength stability of joint | |
| CN114309950A (en) | Material process suitable for surface pulse laser welding additive of carburized and quenched steel workpiece | |
| CN111005025B (en) | Preparation method of high-temperature wear-resistant coating for automobile valve mold | |
| JP3872637B2 (en) | High-strength α + β-type titanium alloy tube and manufacturing method thereof | |
| CN107470864B (en) | A kind of steel cylinder flow forming and molding process | |
| CN114054533A (en) | Extrusion blank with high material utilization rate and manufacturing method thereof | |
| CN116900649B (en) | Ring piece forming method of aero-engine difficult-to-deform material | |
| CN114762885B (en) | Finish forging method of GH4720Li high-temperature alloy blade and blade forging thereof | |
| CN114876603B (en) | Manufacturing method of high-speed high-power internal combustion engine camshaft | |
| CN103801902B (en) | The anti-vibration bar assembly of CAP1000 nuclear power generating sets steam generator | |
| CN114762891B (en) | Die forging method of GH4720Li high-temperature alloy blade and blade forging thereof | |
| CN102814615B (en) | Method for repairing diameter of female end structures of plastic metal parts | |
| CN116175076A (en) | TIG repair process for metallurgical defects of K423A precision casting | |
| CN115464008A (en) | Method and tool for calibrating titanium alloy rear base | |
| CN116641051A (en) | Technological method for laser repair of circumferential surface of crankshaft |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |