CN111485092B - Elastic gasket and preparation method and application thereof - Google Patents
Elastic gasket and preparation method and application thereof Download PDFInfo
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- CN111485092B CN111485092B CN202010484811.9A CN202010484811A CN111485092B CN 111485092 B CN111485092 B CN 111485092B CN 202010484811 A CN202010484811 A CN 202010484811A CN 111485092 B CN111485092 B CN 111485092B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 65
- 239000000047 product Substances 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000011265 semifinished product Substances 0.000 claims abstract description 18
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims description 40
- 238000005498 polishing Methods 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 27
- 239000002243 precursor Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 238000000227 grinding Methods 0.000 claims description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 239000010959 steel Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000004080 punching Methods 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 13
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 13
- 239000001257 hydrogen Substances 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 10
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000035882 stress Effects 0.000 abstract description 8
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000000956 alloy Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 11
- 238000004881 precipitation hardening Methods 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 7
- 229910001220 stainless steel Inorganic materials 0.000 description 7
- 238000010998 test method Methods 0.000 description 6
- 238000011056 performance test Methods 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910000639 Spring steel Inorganic materials 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000002929 anti-fatigue Effects 0.000 description 1
- 230000002180 anti-stress Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
Abstract
The invention provides an elastic gasket and a preparation method and application thereof, and belongs to the technical field of alloy materials. The preparation method of the elastic gasket provided by the invention comprises the following steps: blanking 07Cr17Ni7Al material to obtain a gasket plain sheet; molding the gasket flat sheet to obtain a semi-finished gasket product; and carrying out aging treatment on the semi-finished product of the gasket at the temperature of 330-560 ℃ to obtain the elastic gasket. According to the invention, 07Cr17Ni7Al material is used as a raw material, blanking and forming are carried out, and aging treatment is carried out at 330-560 ℃, so that the finally prepared elastic gasket can avoid hydrogen embrittlement fracture, and has high strength and hardness, and excellent fatigue resistance and stress corrosion resistance.
Description
Technical Field
The invention relates to the technical field of alloy materials, in particular to an elastic gasket and a preparation method and application thereof.
Background
In a threaded connection of high-end mechanical equipment, an elastic washer is widely used with its good anti-loosening function. High-end mechanical equipment manufacturing requires that the anti-loosening part has good elasticity and toughness and good corrosion resistance. At present, anti-loosening parts are generally made of high-strength spring steel, and in order to improve the corrosion resistance of an elastic part made of the spring steel, the elastic part is generally electroplated by adopting a traditional electroplating process. However, the high-hardness elastic member is easily broken by hydrogen embrittlement after being electroplated, and hydrogen is difficult to be removed cleanly by using a common hydrogen removal process. Due to the delayed hydrogen embrittlement fracture, the hydrogen embrittlement fracture of the qualified product still occurs in the using process, which not only can cause connection failure, but also the fragments generated by the fracture can endanger the safety of equipment in the operation process of the equipment, and even bring disastrous results.
Disclosure of Invention
The elastic gasket prepared by the method provided by the invention can avoid hydrogen embrittlement fracture, and has high strength and hardness, and excellent fatigue resistance and stress corrosion resistance.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of an elastic gasket, which comprises the following steps:
blanking 07Cr17Ni7Al material to obtain a gasket plain sheet;
molding the gasket flat sheet to obtain a semi-finished gasket product;
and carrying out aging treatment on the semi-finished product of the gasket at the temperature of 330-560 ℃ to obtain the elastic gasket.
Preferably, the elastic washer is a tapered elastic washer, a saddle-shaped elastic washer, a wave-shaped elastic washer, or an outer saw-tooth locking elastic washer.
Preferably, when the conical elastic washer is prepared, the temperature of the aging treatment is 430-560 ℃, and the heat preservation time is 60-120 minutes.
Preferably, when the saddle-shaped elastic gasket is prepared, the temperature of the aging treatment is 430-500 ℃, and the heat preservation time is 60-120 minutes.
Preferably, when the wavy elastic washer is prepared, the temperature of the aging treatment is 400-430 ℃, and the heat preservation time is 60-90 minutes.
Preferably, when the external sawtooth locking elastic washer is prepared, the temperature of the aging treatment is 330-390 ℃, and the heat preservation time is 50-90 minutes.
Preferably, the aging treatment also comprises surface polishing after the aging treatment is finished.
Preferably, the surface polishing is carried out in the presence of an abrasive and a polishing agent.
The invention provides the elastic gasket prepared by the preparation method in the technical scheme, and the specification of the elastic gasket is 2-30 mm.
The invention provides application of the elastic washer in the technical scheme in high-end mechanical equipment.
The invention provides a preparation method of an elastic gasket, which comprises the following steps: blanking 07Cr17Ni7Al material to obtain a gasket plain sheet; molding the gasket flat sheet to obtain a semi-finished gasket product; and carrying out aging treatment on the semi-finished product of the gasket at the temperature of 330-560 ℃ to obtain the elastic gasket. According to the invention, 07Cr17Ni7Al material is used as a raw material, after blanking and forming, aging treatment is carried out at 330-560 ℃, the hardness of a workpiece can be stabilized, stress is released, the finally prepared elastic gasket can avoid hydrogen embrittlement fracture, the tensile strength is not less than 1450Mpa (higher than that of 65Mn steel material), the hardness is 430-510 HV, and the fatigue resistance and the stress corrosion resistance are excellent.
Detailed Description
The invention provides a preparation method of an elastic gasket, which comprises the following steps:
blanking 07Cr17Ni7Al material to obtain a gasket plain sheet;
molding the gasket flat sheet to obtain a semi-finished gasket product;
and carrying out aging treatment on the semi-finished product of the gasket at the temperature of 330-560 ℃ to obtain the elastic gasket.
According to the invention, 07Cr17Ni7Al material is used as a raw material, blanking and forming are carried out, and aging treatment is carried out at 330-560 ℃, so that the finally prepared elastic gasket can avoid hydrogen embrittlement fracture, and has high strength and hardness, and excellent fatigue resistance and stress corrosion resistance. In the invention, the 07Cr17Ni7Al material is 07Cr17Ni7Al precipitation hardening stainless steel, which belongs to nickel-saving semi-austenite precipitation hardening stainless steel and is a transition precipitation hardening stainless steel between martensite precipitation hardening stainless steel and austenite precipitation hardening stainless steel; the 07Cr17Ni7Al material is characterized by having the ultrahigh hardness of martensite precipitation hardening stainless steel and the high toughness of austenite precipitation hardening stainless steel, being capable of carrying out cutting processing, cold deformation and welding in an austenite state, then controlling martensite phase transformation and precipitation hardening through aging treatment, obtaining different toughness coordination, avoiding hydrogen embrittlement fracture and having better comprehensive mechanical property; in addition, the 07Cr17Ni7Al material has good corrosion resistance, especially excellent stress corrosion resistance, and also has excellent abrasion resistance.
According to the invention, a 07Cr17Ni7Al material is blanked to obtain the gasket plain sheet. In the present invention, the blanking method is preferably stamping. The size of the flat gasket sheet is not particularly limited and can be selected according to actual needs.
After the gasket plain film is obtained, the gasket plain film is molded to obtain a semi-finished gasket product. In the present invention, the molding is preferably performed by stamping. The size or the shape of the semi-finished gasket product is not particularly limited and can be selected according to actual requirements. In the invention, the material of the forming die for forming is preferably high-quality die steel, such as DC53 die steel, and the forming die for forming has the advantages of high strength, good toughness, wear resistance, small wear to semi-finished products and guarantee of the size of the semi-finished products, and the forming die made of the material is favorable for guaranteeing the product quality.
In the invention, the 07Cr17Ni7Al material has high strength, if the material is formed only once, the damage of a forming die is quick, the die needs to be maintained frequently, burrs are easy to generate on the product, and the problems of unqualified product height, large size deviation and the like are easy to cause; the invention adopts fractional molding (namely blanking and molding) to avoid the problems, wherein the blanking step ensures the inner and outer diameter sizes of the product, and the molding step ensures the height size of the product.
After obtaining the semi-finished product of the gasket, the semi-finished product of the gasket is subjected to aging treatment at 330-560 ℃ to obtain the elastic gasket. In the present invention, the elastic washer is preferably a tapered elastic washer, a saddle-shaped elastic washer, a wave elastic washer, or an external serration locking elastic washer; the invention preferably selects proper aging treatment conditions according to the specific type and specification (nominal diameter) of the elastic gasket, and the conditions are as follows:
in the invention, when the conical elastic gasket is prepared, the temperature of the aging treatment is preferably 430-560 ℃, more preferably 430-500 ℃, and the heat preservation time is preferably 60-120 minutes; the specification of the conical elastic washer is preferably 2-30 mm, and more preferably 4-10 mm; specifically, when the specification of the conical elastic washer is 4-5 mm, the aging treatment temperature is preferably 430 ℃, the heat preservation time is preferably 60 minutes, and the conical elastic washer is air-cooled; when the specification is 6mm, the temperature of the aging treatment is preferably 470 ℃, the heat preservation time is preferably 60 minutes, and the air cooling is carried out; when the specification is 8mm, the temperature of the aging treatment is preferably 500 ℃, the heat preservation time is preferably 60 minutes, and the air cooling is carried out; when the specification is 10mm, the temperature of the aging treatment is preferably 500 ℃, the heat preservation time is preferably 120 minutes, and the air cooling is carried out.
In the invention, when the saddle-shaped elastic washer is prepared, the temperature of the aging treatment is preferably 430-500 ℃, and the heat preservation time is preferably 60-120 minutes; the specification of the saddle-shaped elastic washer is preferably 2-10 mm; specifically, when the specification of the saddle-shaped elastic washer is 2-5 mm, the temperature of the aging treatment is preferably 430 ℃, the heat preservation time is preferably 60 minutes, and the saddle-shaped elastic washer is air-cooled; when the specification is 6mm, the temperature of the aging treatment is preferably 450 ℃, the heat preservation time is preferably 60 minutes, and the air cooling is carried out; when the specification is 8mm, the temperature of the aging treatment is preferably 470 ℃, the heat preservation time is preferably 90 minutes, and the air cooling is carried out; when the specification is 10mm, the temperature of the aging treatment is preferably 500 ℃, the heat preservation time is preferably 120 minutes, and the air cooling is carried out.
In the invention, when the wavy elastic washer is prepared, the temperature of the aging treatment is preferably 400-430 ℃, and the heat preservation time is preferably 60-90 minutes; the specification of the wave-shaped elastic washer is preferably 3-30 mm; specifically, when the specification of the wave-shaped elastic washer is 3-6 mm, the temperature of the aging treatment is preferably 400 ℃, the heat preservation time is preferably 60 minutes, and the wave-shaped elastic washer is air-cooled; when the specification is 8-18 mm, the temperature of the aging treatment is preferably 415 ℃, the heat preservation time is preferably 70 minutes, and air cooling is carried out; when the specification is 20-30 mm, the temperature of the aging treatment is preferably 430 ℃, the heat preservation time is preferably 90 minutes, and the air cooling is carried out.
In the invention, when the external sawtooth locking elastic washer is prepared, the temperature of the aging treatment is preferably 330-390 ℃, and the heat preservation time is preferably 50-90 minutes; the specification of the external sawtooth locking elastic washer is preferably 2-12 mm; specifically, when the specification of the external sawtooth locking elastic washer is 2-5 mm, the aging treatment temperature is preferably 330 ℃, the heat preservation time is preferably 50 minutes, and the external sawtooth locking elastic washer is air-cooled; when the specification is 6-8 mm, the temperature of the aging treatment is preferably 360 ℃, the heat preservation time is preferably 70 minutes, and the air cooling is carried out; when the specification is 10-12 mm, the temperature of the aging treatment is preferably 390 ℃, the heat preservation time is preferably 90 minutes, and the air cooling is carried out.
According to the invention, the aging treatment is carried out within the specific temperature range, so that the hardness of the product can be stabilized, the plasticity and the toughness of the product are increased, the internal stress generated after deformation is eliminated, the finally prepared elastic gasket can avoid hydrogen embrittlement fracture, and the elastic gasket has high strength and hardness, and has excellent fatigue resistance and stress corrosion resistance.
In the present invention, it is preferable that the aging treatment is completed and then further includes surface polishing, and the surface polishing is preferably performed in the presence of an abrasive and a polishing agent; the grinding material is preferably a high-alumina ceramic grinding material, and the granularity of the high-alumina ceramic grinding material is preferably 4-8 mm); the addition amount of the high-alumina ceramic abrasive is preferably 35-45% of the mass of the semi-finished gasket product, and more preferably 40%; the type of the polishing agent is not particularly limited in the present invention, and a polishing agent known to those skilled in the art may be used, and the addition amount of the polishing agent is preferably 3.8% of the mass of the semi-finished gasket. The time for polishing the surface is not specially limited, and the time is selected according to the specific shape of the elastic gasket, for example, 5-20 minutes, so that the surface of the product is bright and smooth and has no burrs. In the present invention, the surface polishing is preferably performed in a vibratory finishing machine.
After the aging treatment is completed, the obtained product is preferably washed by clean water and dried in a dryer to obtain the elastic gasket.
The invention provides the elastic gasket prepared by the preparation method in the technical scheme, and the specification of the elastic gasket is 2-30 mm.
The invention provides application of the elastic washer in the technical scheme in high-end mechanical equipment. The elastic gasket provided by the invention can avoid hydrogen embrittlement fracture, has high strength and hardness and excellent anti-fatigue and anti-stress corrosion performances, and is suitable for high-end mechanical equipment, such as military mechanical equipment.
The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The method for preparing the conical elastic washer (the specification is 4-10 mm) by using the 07Cr17Ni7Al material comprises the following steps:
1) blanking: forming a gasket flat sheet by stamping;
2) molding: processing the die steel by using a DC53 die to obtain a forming die, and forming a semi-finished product of the conical washer by stamping;
3) aging treatment: carrying out aging treatment on the semi-finished product of the conical gasket to obtain a gasket precursor; when the specification of the conical elastic washer is 4-5 mm, the aging treatment temperature is 430 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 6mm, the temperature of the aging treatment is 470 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 8mm, the temperature of the aging treatment is 500 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 10mm, the temperature of the aging treatment is 500 ℃, the heat preservation time is 120 minutes, and the air cooling is carried out;
4) surface polishing: adding an abrasive (specifically a high-alumina ceramic abrasive with the granularity of 4-8 mm and the addition amount of 40% of the mass of the gasket precursor) and a polishing agent (the addition amount of 3.8% of the mass of the gasket precursor) into a vibration grinding polisher, polishing the surface of the gasket precursor, and after 5-20 minutes, enabling the surface of the product to be bright and smooth and free of burrs, then washing the product with clear water, and drying the product in a dryer to obtain the conical elastic gasket.
Example 2
The method for preparing the saddle-shaped elastic washer (the specification is 2-10 mm) by using the 07Cr17Ni7Al material comprises the following steps:
1) blanking: forming a gasket flat sheet by stamping;
2) molding: processing the die steel DC53 to obtain a forming die, and forming a saddle washer semi-finished product by stamping;
3) aging treatment: carrying out aging treatment on the saddle-shaped gasket semi-finished product to obtain a gasket precursor; when the specification of the saddle-shaped elastic washer is 2-5 mm, the aging treatment temperature is 430 ℃, the heat preservation time is 60 minutes, and the saddle-shaped elastic washer is air-cooled; when the specification is 6mm, the temperature of the aging treatment is 450 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 8mm, the temperature of the aging treatment is 470 ℃, the heat preservation time is 90 minutes, and air cooling is carried out; when the specification is 10mm, the temperature of the aging treatment is 500 ℃, the heat preservation time is 120 minutes, and the air cooling is carried out.
4) Surface polishing: adding an abrasive (specifically a high-alumina porcelain abrasive with the granularity of 4-8 mm and the addition amount of 40% of the mass of the gasket precursor) and a polishing agent (the addition amount of 3.8% of the mass of the gasket precursor) into a vibration grinding polisher, polishing the surface of the gasket precursor, and after 5-20 minutes, enabling the surface of the product to be bright and smooth and free of burrs, then washing the product with clear water, and drying the product in a dryer to obtain the saddle-shaped elastic gasket.
Example 3
The method for preparing the wavy elastic washer (the specification is 3-30 mm) by using the 07Cr17Ni7Al material comprises the following steps:
1) blanking: forming a gasket flat sheet by stamping;
2) molding: processing the die steel by using a DC53 die to obtain a forming die, and forming a semi-finished product of the wave washer by stamping;
3) aging treatment: carrying out aging treatment on the semi-finished product of the wave washer to obtain a washer precursor; when the specification of the wave-shaped elastic washer is 3-6 mm, the temperature of aging treatment is 400 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 8-18 mm, the temperature of aging treatment is 415 ℃, the heat preservation time is 70 minutes, and air cooling is carried out; and when the specification is 20-30 mm, the temperature of the aging treatment is 430 ℃, the heat preservation time is 90 minutes, and air cooling is carried out.
4) Surface polishing: adding an abrasive (specifically a high-alumina ceramic abrasive with the granularity of 4-8 mm and the addition amount of 40% of the mass of the gasket precursor) and a polishing agent (the addition amount of 3.8% of the mass of the gasket precursor) into a vibration grinding polisher, polishing the surface of the gasket precursor, and after 5-20 minutes, enabling the surface of the product to be bright and smooth and free of burrs, then washing the product with clear water, and drying the product in a dryer to obtain the wavy elastic gasket.
Example 4
The method for preparing the external sawtooth locking elastic washer (the specification is 2-12 mm) by using the 07Cr17Ni7Al material comprises the following steps:
1) blanking: forming a gasket flat sheet by stamping;
2) molding: processing the die steel by using DC53 to obtain a forming die, and forming a semi-finished product of the outer sawtooth locking washer by stamping;
3) aging treatment: carrying out aging treatment on the semi-finished product of the outer sawtooth locking washer to obtain a washer precursor; when the specification of the outer sawtooth locking elastic washer is 2-5 mm, the aging treatment temperature is 330 ℃, the heat preservation time is 50 minutes, and air cooling is carried out; when the specification is 6-8 mm, the temperature of the aging treatment is 360 ℃, the heat preservation time is 70 minutes, and air cooling is carried out; and when the specification is 10-12 mm, the temperature of the aging treatment is 390 ℃, the heat preservation time is 90 minutes, and the air cooling is carried out.
4) Surface polishing: adding an abrasive (specifically a high-alumina ceramic abrasive with the granularity of 4-8 mm and the addition amount of 40% of the mass of the gasket precursor) and a polishing agent (the addition amount of 3.8% of the mass of the gasket precursor) into a vibration grinding polisher, polishing the surface of the gasket precursor, enabling the surface of the product to be bright and smooth after 5-20 minutes and free of burrs, then washing the product with clear water, and drying the product in a dryer to obtain the outer sawtooth locking elastic gasket.
Performance testing
The conical elastic gasket prepared in example 1 was subjected to performance testing as follows:
(1) sample information
Specification: sample #16mm, sample # 2#10 mm;
(2) surface quality
The number of samples 1# is 16, and the labels are samples 1# -1-1 ~ 1# -1-16: no cracks and burrs are found on the surface;
the number of samples 2# is 16, and the labels are samples 2# -1-1 to 2# -1-16: no cracks and burrs are found on the surface;
(3) dimension measurement, test method: the digital display caliper is characterized in that D is a nominal inner diameter, D is a nominal outer diameter, and S is the thickness of the elastic washer; the test results are shown in table 1;
(4) hardness test, test method: GB/T4340.1-2009, test results are shown in Table 1.
Table 1 results of performance testing of tapered elastomeric gaskets prepared in example 1
The saddle-shaped elastic gasket prepared in example 2 was subjected to performance tests as follows:
(1) sample information
Specification: sample # 15 mm, sample # 2#10 mm;
(2) surface quality
The number of samples 1# is 16, and the labels are samples 1# -1-1 ~ 1# -1-16: no cracks and burrs are found on the surface;
the number of samples 2# is 16, and the labels are samples 2# -1-1 to 2# -1-16: no cracks and burrs are found on the surface;
(3) dimension measurement, test method: the digital display caliper is characterized in that D is a nominal inner diameter, D is a nominal outer diameter, and S is the thickness of the elastic washer; the test results are shown in Table 2;
(4) hardness test, test method: GB/T4340.1-2009, test results are shown in Table 2.
Table 2 results of performance testing of saddle-shaped elastic gaskets prepared in example 2
The wave-shaped elastic gasket prepared in example 3 was subjected to a performance test as follows:
(1) sample information
Specification: sample #1 10mm, sample # 2#16 mm;
(2) surface quality
The number of samples 1# is 16, and the labels are samples 1# -1-1 ~ 1# -1-16: no cracks and burrs are found on the surface;
the number of samples 2# is 16, and the labels are samples 2# -1-1 to 2# -1-16: no cracks and burrs are found on the surface;
(3) dimension measurement, test method: the digital display caliper is characterized in that D is a nominal inner diameter, D is a nominal outer diameter, and S is the thickness of the elastic washer; the test results are shown in Table 3;
(4) hardness test, test method: GB/T4340.1-2009, test results are shown in Table 3.
Table 3 results of performance test of the wave elastic gasket prepared in example 3
The external serration locking spring washers prepared in example 4 were subjected to a performance test of 8mm in specification and 5 samples in number, and the test results are shown in table 4:
table 4 results of performance test of the external serration locking spring washer prepared in example 4
The test of the tensile strength of the 07Cr17Ni7Al material according to the method in GB/T228.1-2010 shows that the tensile strength of the 07Cr17Ni7Al material is larger than or equal to 1450MPa (higher than that of 65Mn steel), and products produced by using the 07Cr17Ni7Al material do not need to be additionally electroplated and have no risk of hydrogen embrittlement fracture.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. A method of making an elastomeric gasket, comprising the steps of:
1) blanking: forming a flat gasket sheet from 07Cr17Ni7Al material by punching;
2) molding: processing by using DC53 die steel to obtain a forming die, and stamping the gasket flat sheet by using the forming die to form a conical gasket semi-finished product;
3) aging treatment: carrying out aging treatment on the semi-finished product of the conical gasket to obtain a gasket precursor; when the specification of the conical elastic washer is 4-5 mm, the aging treatment temperature is 430 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 6mm, the temperature of the aging treatment is 470 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 8mm, the temperature of the aging treatment is 500 ℃, the heat preservation time is 60 minutes, and air cooling is carried out; when the specification is 10mm, the temperature of the aging treatment is 500 ℃, the heat preservation time is 120 minutes, and the air cooling is carried out;
4) surface polishing: adding an abrasive and a polishing agent into a vibration grinding and polishing machine, polishing the surface of the gasket precursor, and after 5-20 minutes, polishing the surface of the product to be smooth and bright without burrs, then washing the product with clear water, and drying the product in a dryer to obtain the conical elastic gasket;
the grinding material is a high-alumina ceramic grinding material, the granularity is 4-8 mm, and the addition amount is 40% of the mass of the gasket precursor;
the addition amount of the polishing agent is 3.8% of the mass of the gasket precursor;
the specification of the elastic washer is 4-10 mm.
2. The elastic gasket prepared by the preparation method of claim 1, wherein the specification of the elastic gasket is 4-10 mm.
3. Use of the elastomeric gasket of claim 2 in high end mechanical equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Denomination of invention: A kind of elastic washer and its preparation method and application Effective date of registration: 20221228 Granted publication date: 20210430 Pledgee: Zhejiang Jiashan rural commercial bank Limited by Share Ltd. Tao Zhuang sub branch Pledgor: JIASHAN YONGXIN FASTENER Co.,Ltd. Registration number: Y2022110000352 |