CN102134633B - Precise heat treatment method of high-precision elastic element - Google Patents
Precise heat treatment method of high-precision elastic element Download PDFInfo
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- CN102134633B CN102134633B CN2011100229549A CN201110022954A CN102134633B CN 102134633 B CN102134633 B CN 102134633B CN 2011100229549 A CN2011100229549 A CN 2011100229549A CN 201110022954 A CN201110022954 A CN 201110022954A CN 102134633 B CN102134633 B CN 102134633B
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 238000010791 quenching Methods 0.000 claims abstract description 47
- 230000000171 quenching effect Effects 0.000 claims abstract description 37
- 230000032683 aging Effects 0.000 claims abstract description 25
- 239000002245 particle Substances 0.000 claims abstract description 23
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 20
- 239000010439 graphite Substances 0.000 claims abstract description 20
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 238000005496 tempering Methods 0.000 claims abstract description 11
- 238000011068 loading method Methods 0.000 claims abstract description 7
- 238000009413 insulation Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- 239000008187 granular material Substances 0.000 claims description 6
- 238000013019 agitation Methods 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 5
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 abstract description 8
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 230000035882 stress Effects 0.000 abstract description 7
- 238000004804 winding Methods 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000002791 soaking Methods 0.000 description 8
- 238000007669 thermal treatment Methods 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910001339 C alloy Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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Abstract
The invention relates to a precise heat treatment method of a high-precision elastic element. In the invention, quenching is carried out by adopting a fluidized particle furnace and elastic element quenching treatment equipment, wherein graphite particles are used as a heating medium and optimized design is carried out on the quenching temperature, the heat preservation time and the cooling manner so that the non-oxidation quenching treatment of the high-precision elastic element is realized and the surface quality and the size precision of the high-precision elastic element are improved; according to the quenching rigidity of the high-precision elastic element, proper technological parameters are selected to carry out tempering treatment; and loading ageing treatment is conducted to the element by adopting elastic element loading treatment equipment so that the stress relaxation property of the elastic element is improved, the stress in the winding process is reduced and the micro-yield strength is effectively improved. Through the heat treatment method of the invention, the high-precision elastic element is free of oxidation on the surface, free of deformation on the size and stable in mechanical property after the quenching, and the reliability and the quality of the heat treatment of the high-precision elastic element are improved.
Description
Technical field
The present invention relates to the precise treatment heat treatment technics of elastic element, particularly relate to a kind of precise treatment heat treating method of high precision elastic element.
Background technology
The high precision elastic element is the component commonly used of spacecraft structure and mechanism, machinery, electronic product, and elastic element need be heat-treated reinforcement after moulding, satisfy technical indicators such as its hardness, intensity and elasticity.High precision elastic size of component deviation is less, and the oxidation that produces in the heat treatment process, thermal stresses, structural stress etc. are prone to cause the dimension overproof of elastic element; Elastic element uses the little yield deformation that produces in condition of high ground stress, influences its mechanical property.
In the thermal treatment of high precision elastic element, quench treatment adopts air furnace or salt bath furnace more, and heat treatment process causes dimensional precision to descend under thermal stresses and structural stress effect, causes its qualification rate on the low side.The quenching of elastic element higher (majority is higher than 800 ℃), the quenching and preserving heat process causes surperficial high temperature oxidation, and scale thickness increases, and influence the fracture toughness property of material, and follow-up surface treatment difficulty is bigger.In the salt bath furnace heat-processed, the volatilization of heating salt, it is healthy to influence operator; It is long that salt bath furnace is handled heat-up time, and operation element is complicated, has danger such as dissolved salt blast.
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art; A kind of precise treatment heat treating method of high precision elastic element is provided; This method is through adopting fluidized particle furnace as quenching apparatus, and granular graphite carries out quench treatment as heating medium to elastic element, and by the quenching frock; Also adopting loading actual effect frock that elastic element is carried out loading simultaneously handles; Solve problems such as elastic element quenching oxidation, precise decreasing, realized that the non-oxidation of elastic element is quenched and high dimensional accuracy, improved the safety of elastic element and the quality product of elastic element greatly.
Above-mentioned purpose of the present invention is achieved through following technical scheme:
A kind of heat treating method of high precision elastic element comprises the steps:
Step (one), elastic element is installed inner in the quenching frock; The height of regulating elastic element makes it be in the minute-pressure state that contracts; And guaranteeing that elastic element end face each point height is consistent, said quenching frock also can be regulated the device of elastic element height for being installed to elastic element;
Step (two), employing fluidized particle furnace carry out quench treatment to elastic element; At first fluidized particle furnace is heated to the quenching temperature of elastic element material, adopt air or nitrogen to carry out the air agitation convection current during heat temperature raising, and be heating medium with the granular graphite; Then the quenching frock is vertically packed in the fluidized particle furnace; Be incubated, insulation is cooled off elastic element after finishing fast;
Step (three), elastic element is carried out cleaning surfaces, guarantee the no greasy dirt in elastic element surface;
Step (four), elastic element is carried out temper; After temper equipment is warmed up to tempering temperature; With the elastic element temper equipment of packing into, after the temper device temperature recovers tempering temperature, insulation 1h～2h; With the elastic element air cooling of coming out of the stove rapidly, said tempering temperature obtains according to the tempered-hardness-temperature control curve of elastic element material;
Step (five), elastic element is carried out load up ageing handle; Adopt the load up ageing frock that elastic element is compressed to the working limit size; And the load up ageing frock air dry oven of packing into heated, Heating temperature between 50 ℃～100 ℃, keep 20h～60h continuously after; With the elastic element air cooling of coming out of the stove, said load up ageing frock for being installed and can regulating the device of elastic element height to elastic element.
In the heat treating method of above-mentioned high precision elastic element; Quenching frock in the step () comprises governor lever, upper mounted plate, bottom plate and set screw nut; Wherein governor lever is also fastening through set screw nut between upper mounted plate and bottom plate; Set screw nut is positioned at upper mounted plate upper end, the height of the position adjustments elastic element through regulating upper mounted plate.
In the heat treating method of above-mentioned high precision elastic element, being in the contract draught of elastic element of state of minute-pressure in the step () is 1～2.5% of elastic element original height.
In the heat treating method of above-mentioned high precision elastic element, when adopting air or nitrogen to carry out the air agitation convection current in the step (two), flow of aerating air is 5m
3/ h～15m
3/ h.
In the heat treating method of above-mentioned high precision elastic element, be heating medium with the granular graphite in the step (two), the particle diameter of granular graphite is 30 μ m～50 μ m.
In the heat treating method of above-mentioned high precision elastic element, the quencher is contained in the soaking time=elastic element diameter R * heat insulating coefficient in the fluidized particle furnace in the step (two).
In the heat treating method of above-mentioned high precision elastic element, clear up the graphite granule of elastic element surface attachment after insulation finishes in the step (two) at first fast, again elastic element to be cooled off fast, cooling comprises oil cooling, water-cooled or air cooling processing.
In the heat treating method of above-mentioned high precision elastic element, adopt stain remover or gasoline that elastic part is carried out cleaning surfaces in the step (three).
In the heat treating method of above-mentioned high precision elastic element, temper equipment is vacuum oven, protective atmosphere stove or air furnace in the step (four).
In the heat treating method of above-mentioned high precision elastic element, the load up ageing frock comprises stationary shaft, fitting nut and pad in the step (five), and wherein stationary shaft is made up of termination and axis body; Fitting nut and pad are enclosed within on the axis body; When the loading actual effect is handled, elastic element is sleeved on the axis body of stationary shaft, an end is close to the termination of stationary shaft; The other end is close to pad, through the position of adjustment fitting nut elastic element is compressed.
The present invention compares prior art and has following advantage:
(1) the present invention adopts fluidized particle furnace to the elastic element quench treatment, and granular graphite is as heating medium.Fluidized particle furnace is under the inflation heating condition, and the graphite granule in the stove fully stirs mobile, has consumed the O during stove is interior
2, and produced a certain amount of CO
2With reducing atmospheres such as CO, protected the elastic element of hot conditions, realized the non-oxidation processing;
(2) the present invention draws in the quench treatment process through a large amount of technological tests, and control graphite granule diameter is 30 μ m～50 μ m, and flow of aerating air is 5m
3/ h～15m
3/ h, fluidised form ion stove internal heating environment is best, and quenching effect is best, and the interior abundant convection current of graphite of stove this moment has guaranteed the temperature homogeneity in the stove;
(3) the present invention adopts the quencher of dimensional precision control to load onto down the whole height of regulating elastic element when the high precision elastic element quenches, and elastic element can realize that multiple spot is installed; Adjust the elastic element height before the quench treatment, produce the predeformation of a certain amount of size, make elastic element that play up and down not take place under heating condition; Reduce the quenching thermal distortion of elastic element; Guaranteed form factor, overcome that elastic element does not carry out size control in the prior art, high temperature deformation has taken place under hot conditions and organize deformation; Its profile produces distortion even distortion, the defective that causes substandard product to occur;
(4) the present invention is directed to the high precision elastic element and increased the load up ageing processing; Utilize elastic element compression, high temperature, keep making that elastic element produces the little surrender in the ultimate load for a long time, guaranteed the elastic element stable mechanical property, do not produce viscous deformation under the working conditions; Use properties improves; Efficiently solve the high precision elastic element in use, be prone to take place the stand under load distortion, the change of contracting takes place to surrender in elastic element; Length or height can not recover life size, can cause problems such as high-accuracy structural mechanism product failure;
(5) the present invention adopts fluidized particle furnace that elastic element is heat-treated; Simple, the safety of operation engineering can realize its non-oxidation thermal treatment, adopts quenching frock and load up ageing frock that elastic element is handled simultaneously; Can realize the accurate control of its size, guarantee thermal treatment quality.
Description of drawings
Fig. 1 is a high precision elastic element thermal treatment process schema of the present invention;
Fig. 2 is a high precision elastic element synoptic diagram of the present invention;
Fig. 3 is quencher's assembling structure synoptic diagram of the present invention;
Fig. 4 is high precision elastic element of the present invention-quenching frock synoptic diagram that is installed;
Fig. 5 is a load up ageing tool structure synoptic diagram of the present invention;
Fig. 6 is high precision elastic element of the present invention-load up ageing frock synoptic diagram that is installed.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
Be illustrated in figure 1 as high precision elastic element thermal treatment process schema of the present invention, comprise that frock is installed, quench treatment, cleaning surfaces, temper and load up ageing handle, and be specific as follows:
(1) elastic element 1 being carried out frock is installed; Be illustrated in figure 3 as quencher's assembling structure synoptic diagram of the present invention; The quenching frock comprises governor lever 5, upper mounted plate 3, bottom plate 4 and set screw nut 2, and wherein governor lever 5 is also fastening through set screw nut 2 between upper mounted plate 3 and bottom plate 4, and set screw nut 2 is positioned at upper mounted plate 3 upper ends; Regulate the whole height that set screw nut 2 can up-down adjustment elastic element 1, elastic element 1 can realize that multiple spot is installed.The material of quenching frock can be selected stainless steel or low-carbon alloy steel for use.
Be illustrated in figure 2 as high precision elastic element synoptic diagram of the present invention; It is inner in the quenching frock that elastic element 1 is installed; The height of regulating elastic element 1 makes it be in the minute-pressure state that contracts; Being in the contract draught of elastic element of state of minute-pressure is 1～2.5% of elastic element 1 original height, makes elastic element that play up and down not take place under heating condition, reduces the quenching thermal distortion of elastic element; And guarantee that elastic element 1 end face each point height is consistent, be illustrated in figure 4 as high precision elastic element of the present invention-quenching frock synoptic diagram that is installed.
(2) adopting fluidized particle furnace to carry out quench treatment, is heating medium with the granular graphite, and its particle size is 30 μ m～50 μ m, adopts air or nitrogen to carry out the air agitation convection current during heating, and flow of aerating air should guarantee at 5m
3/ h～15m
3/ h, gas flow can suitably be adjusted, and makes graphite in furnace chamber, fully stir and flows, and does not overflow furnace roof portion, under hot conditions, obtains CO
2With reducing atmospheres such as CO.
At first fluidized particle furnace is heated to the quenching temperature of elastic element material; After the instrument displays temperature reaches quenching temperature; The quenching frock is vertically packed in the burner hearth, and insulation picks up counting, after insulation finishes; Should clear up the graphite granule of elastic element surface attachment fast, oil cooling, water-cooled or air cooling are handled again.Soaking time in fluidized particle furnace=elastic element diameter R * heat insulating coefficient, heat insulating coefficient is 1.5min/mm.
Adopting granular graphite is the fluidized particle furnace of heating medium, under hot conditions, has consumed the oxygen in the stove, obtains low reducing atmosphere.The quenching temperature of fluidized particle furnace and air furnace basically identical; Soaking time is generally 2/3 of air furnace soaking time; For example: the material of elastic element is 50CrVA, and the steel wire diameter of elasticity original paper is 5mm, and the quenching temperature of air furnace and soaking time are respectively 850 ℃, 15min; The quenching temperature of employing fluidized particle furnace is constant still to be 850 ℃, and soaking time=5mm * 1.5min/mm=7.5min owing to consider the frock heat absorption, so general soaking time is elected 10min as, is essentially 2/3 of air furnace soaking time.
(3) adopt stain remover or gasoline that elastic part 1 is carried out cleaning surfaces.
(4) elastic element 1 is carried out temper, temper equipment can be selected vacuum oven, protective atmosphere stove or air furnace for use, temper equipment is warmed up to tempering temperature after; Elastic element 1 is put into charging basket; The temper of packing into equipment, after the temper device temperature recovers tempering temperature, insulation 1h～2h; With elastic element 1 air cooling of coming out of the stove rapidly, tempering temperature obtains according to the tempered-hardness-temperature control curve of elastic element 1 material.
(5) elastic element 1 is carried out load up ageing and handle, be illustrated in figure 5 as load up ageing tool structure synoptic diagram of the present invention, the load up ageing frock comprises stationary shaft, fitting nut 7 and pad 8; Wherein stationary shaft is made up of termination 6 and axis body 9, and fitting nut 7 is enclosed within on the axis body 9 with pad 8, when the loading actual effect is handled; Elastic element 1 is sleeved on the axis body 9 of stationary shaft; One end is close to the termination 6 of stationary shaft, and the other end is close to pad, through the position of adjustment fitting nut 7 elastic element 1 is compressed; Realize the altitude mixture control of elastic element 1, be illustrated in figure 6 as high precision elastic element of the present invention-load up ageing frock synoptic diagram that is installed.
At first adopt the load up ageing frock that elastic element 1 is compressed to the working limit size; And the load up ageing frock air dry oven of packing into heated; Adding thermal life must strict control process parameters, Heating temperature between 50 ℃～100 ℃, keep 20h～60h continuously after; With elastic element 1 air cooling of coming out of the stove, accomplish whole heat treatment process.
After elastic element is accomplished Q-tempering, elastic element is compressed to the limiting dimension of work, under the certain temperature condition, keeps for some time; Carry out load up ageing and handle, load up ageing is handled and is made material structure tend towards stability, and under the high-load condition, produces little surrender effect; Make stable mechanical property, improved the stress relaxation-resistant ability of elastic element, reduced the stress in the winding process; Do not produce viscous deformation under the working conditions, the use properties of elastic element improves.
Enumerate a concrete embodiment below:
Like Fig. 2 is a kind of high precision elastic element of present embodiment, and its material is the 50CrVA alloy-steel wire, and steel wire diameter is 5.0mm, and as-heat-treated condition is an annealed state.Accomplish coiling, and molding procedure such as head, face grinding after, need carry out the quenching strengthening processing, its hardness requirement is HRC45～50.The elasticity original paper height that finally obtains is 89.5mm, because the elastic element of thermal treatment after intact will pass through art breading such as grinding, so the elastic element initial height is elected 91.5mm as.
Concrete heat treatment process step is following:
Step (one), governor lever 5 is installed in the open hole of bottom plate 4, integral planar is put on the worktable, elastic element 1 is positioned on the bottom plate 4 again, installs retaining plate 3 according to open hole and governor lever 5 positions.With the fastening set screw nut 2 of spanner, the height of control elastic element 1 makes it be in the minute-pressure state that contracts to 90.5mm, and elastic element end face height unanimity.
Step (two), fluidized particle furnace is heated up, heating medium is the granular graphite of 30 μ m～50 μ m, and flow of aerating air is 5m
3/ h～15m
3/ h.After equipment display instrument temperature is 850 ℃, the quenching frock vertical lifting of the elastic element that is installed is gone into the burner hearth mid-way, insulation 10min (calculated value 7.5min considers the frock heat absorption, is decided to be 10min).Hang out frock rapidly with fire tongs or suspension hook afterwards, and rock frock surface graphite granule is come off, get in the quenching oil fast then and cool off.
Step (three), dismounting frock are taken off elastic element 1, soak elastic element 3min with gasoline, remove piece surface with palm brush, guarantee the no greasy dirt in surface.
Step (four), the temper stove heated to 380 ℃ after, elastic element 1 is put into charging basket, the temper of packing into equipment, equipment heats up again, behind the insulation 1.5h, the air cooling of coming out of the stove rapidly.
Step (five), elastic element 1 both ends of the surface polish end face through grinding machine, and elastic element 1 is installed in the load up ageing frock, and spanner is tightened fitting nut 7 elastic element 1 is compressed to its limiting dimension 68.5mm.The frock that is installed is put into air dry oven, adds 70 ℃ of thermal lifes, keep 48h continuously after, air cooling is come out of the stove.
The above; Be merely the best embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.
The content of not doing to describe in detail in the specification sheets of the present invention belongs to this area professional and technical personnel's known technology.
Claims (8)
1. the heat treating method of a high precision elastic element is characterized in that comprising the steps:
Step (one), elastic element (1) is installed inner in the quenching frock; The height of regulating elastic element (1) makes it be in the minute-pressure state that contracts; And guarantee that elastic element (1) end face each point height is consistent; Wherein being in the contract draught of elastic element (1) of state of minute-pressure is 1～2.5% of elastic element (1) original height, and said quenching frock for being installed and can regulating the device of elastic element height to elastic element;
Step (two), employing fluidized particle furnace carry out quench treatment to elastic element (1); At first fluidized particle furnace is heated to the quenching temperature of elastic element (1) material, adopt air or nitrogen to carry out the air agitation convection current during heat temperature raising, and be heating medium with the granular graphite; Then the quenching frock is vertically packed in the fluidized particle furnace; Be incubated, after insulation finishes, elastic element (1) cooling fast;
Step (three), elastic element (1) is carried out cleaning surfaces, guarantee the no greasy dirt in elastic element (1) surface;
Step (four), elastic element (1) is carried out temper; After temper equipment is warmed up to tempering temperature; With elastic element (1) the temper equipment of packing into, after the temper device temperature recovers tempering temperature, insulation 1h～2h; With elastic element (1) air cooling of coming out of the stove rapidly, said tempering temperature obtains according to the tempered-hardness-temperature control curve of elastic element (1) material;
Step (five), elastic element (1) is carried out load up ageing handle; Adopt the load up ageing frock that elastic element (1) is compressed to the working limit size; And the load up ageing frock air dry oven of packing into heated, Heating temperature between 50 ℃～100 ℃, keep 20h～60h continuously after; With elastic element (1) air cooling of coming out of the stove, said load up ageing frock for being installed and can regulating the device of elastic element height to elastic element.
2. the heat treating method of a kind of high precision elastic element according to claim 1; It is characterized in that: the quenching frock in the said step () comprises governor lever (5), upper mounted plate (3), bottom plate (4) and set screw nut (2); Wherein governor lever (5) is positioned between upper mounted plate (3) and the bottom plate (4) also fastening through set screw nut (2); Set screw nut (2) is positioned at upper mounted plate (3) upper end, the height of the position adjustments elastic element (1) through regulating upper mounted plate (3).
3. the heat treating method of a kind of high precision elastic element according to claim 1 is characterized in that: when adopting air or nitrogen to carry out the air agitation convection current in the said step (two), flow of aerating air is 5m
3/ h～15m
3/ h.
4. the heat treating method of a kind of high precision elastic element according to claim 1 is characterized in that: be heating medium with the granular graphite in the said step (two), the particle diameter of granular graphite is 30 μ m～50 μ m.
5. the heat treating method of a kind of high precision elastic element according to claim 1; It is characterized in that: the graphite granule of clearing up elastic element (1) surface attachment after insulation finishes in the said step (two) at first fast; Elastic element (1) is cooled off fast, cooling comprises oil cooling, water-cooled or air cooling processing again.
6. the heat treating method of a kind of high precision elastic element according to claim 1 is characterized in that: adopt stain remover or gasoline that elastic part (1) is carried out cleaning surfaces in the said step (three).
7. the heat treating method of a kind of high precision elastic element according to claim 1 is characterized in that: temper equipment is vacuum oven, protective atmosphere stove or air furnace in the said step (four).
8. the heat treating method of a kind of high precision elastic element according to claim 1; It is characterized in that: the load up ageing frock comprises stationary shaft, fitting nut (7) and pad (8) in the said step (five); Wherein stationary shaft is made up of termination (6) and axis body (9), and fitting nut (7) is enclosed within on the axis body (9) with pad (8), when the loading actual effect is handled; Elastic element (1) is sleeved on the axis body (9) of stationary shaft; One end is close to the termination (6) of stationary shaft, and the other end is close to pad, through the position of adjustment fitting nut (7) elastic element (1) is compressed.
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| CN103194588B (en) * | 2013-01-07 | 2015-03-25 | 浙江吉利汽车研究院有限公司杭州分公司 | Heat treatment process for 65Mn spring washer |
| CN109252023B (en) * | 2018-10-29 | 2020-08-11 | 山西北方机械制造有限责任公司 | Method for heating part local quenching based on fluidized graphite particle furnace |
| CN111745099B (en) * | 2020-06-30 | 2022-09-09 | 中国航发动力股份有限公司 | Processing method and tool for 3J68 functional alloy material small-diameter annular spiral spring |
| CN114134299A (en) * | 2021-12-13 | 2022-03-04 | 鑫精合激光科技发展（北京）有限公司 | Heat treatment method and system for additive manufacturing of high-temperature alloy and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004085685A1 (en) * | 2003-03-26 | 2004-10-07 | Chuo Hatsujo Kabushiki Kaisha | Process for producing high-strength spring |
| CN1789440A (en) * | 2005-11-30 | 2006-06-21 | 李德锵 | Spring heat treatment mechanism of full automatic spring coiling machine |
| CN101200278A (en) * | 2007-12-03 | 2008-06-18 | 李德锵 | Automatic heat treating apparatus for separate packed spring |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004085685A1 (en) * | 2003-03-26 | 2004-10-07 | Chuo Hatsujo Kabushiki Kaisha | Process for producing high-strength spring |
| CN1789440A (en) * | 2005-11-30 | 2006-06-21 | 李德锵 | Spring heat treatment mechanism of full automatic spring coiling machine |
| CN101200278A (en) * | 2007-12-03 | 2008-06-18 | 李德锵 | Automatic heat treating apparatus for separate packed spring |
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