CN109136749A - The processing technology of mechanical main shaft - Google Patents
The processing technology of mechanical main shaft Download PDFInfo
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- CN109136749A CN109136749A CN201810884922.1A CN201810884922A CN109136749A CN 109136749 A CN109136749 A CN 109136749A CN 201810884922 A CN201810884922 A CN 201810884922A CN 109136749 A CN109136749 A CN 109136749A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses the processing technologys of mechanical main shaft, belong to axis processing technique field.Process for refining is organically combined with purification process through alloy smelting, refinement, purification, molding, significantly improves the comprehensive performance of main shaft by mechanical main shaft.Process for refining of the invention is different from traditional process for refining, specific thinning process can change with the states of matter of fining agent, promote the combination degree of fining agent and alloy, promote thinning effect, and the composite purifying process using jet in conjunction with cleanser, comprehensive entire alloy system can be spread to, avoid alloy purification uneven.
Description
Technical field
The invention belongs to axis processing technique fields, and in particular to the processing technology of mechanical main shaft.
Background technique
Mechanical main shaft refers to the axis that workpiece or cutter rotation are driven on lathe, usually by groups such as main shaft, bearing and driving members
At spindle unit.It is mainly used to support transmission, passing movement and torque in the machine or is used to clamping workpiece.Spindle unit
Kinematic accuracy and the rigidity of structure are an important factor for determining processing quality and stock-removing efficiency, wherein kinematic accuracy can pass through machine
Tool processing, mechanized equipment etc. are realized, and the rigidity of structure is determined by the material of main shaft.
The material of mechanical main shaft is generally prepared by steel, and steel refers to based on iron, and a certain amount of carbon, silicon, manganese is added
Equal addition element simultaneously control impurity content and the alloy system that forms.Steel alloy has high-intensitive, high rigidity and high property
Valence ratio, be especially suitable for structural material.
The element composition of alloy no doubt largely determines the performance of steel, and still, different processing technologys is same
It will affect the comprehensive performance of alloy.Traditional mechanical part is all that direct utilize has smelted alloy pig or alloy sheets of completion etc.
Be machined into required part, or directly by molten steel injection mold molding, also have using powder metallurgical technique preparation and
At although traditional processing technology technical maturity, the part of preparation all has intensity, hardness, weatherability, lacking in plasticity
It falls into, especially powder metallurgical technique, is difficult control gap and does not generate.
Publication number 108239724A discloses a kind of steel alloy, can guarantee original steel alloy (stainless steel) 0Cr18Ni9's
Its elongation after fracture is increased substantially on the basis of other mechanical properties.However the steel alloy for only solving elongation after fracture is answered completely
For mechanical main shaft.
Summary of the invention
In view of the above problems, the present invention provides the processing technology of mechanical main shaft, and cooperates the adjustment of alloying component,
To promote intensity, hardness, wearability and the plasticity of alloy.
To achieve the goals above, the invention adopts the following technical scheme:
The processing technology of mechanical main shaft, includes the following steps:
(1) alloy smelting: by alloy pig blanking, melting forms aluminium alloy；
(2) it refines: refining agent being added into aluminium alloy and carries out refining treatment, then fining agent is poured into aluminium alloy, wait thin
Agent is pressed into aluminium alloy after aluminium alloy surface cure and stirs to obtain mixed molten liquid；
(3) it purifies: multiple-way valve is placed in mixed molten liquid, then mixed gas is sprayed by valve opening, control multiple-way valve
Revolving speed and jet parameter；
(4) it forms: purified aluminium alloy being injected into mold, through cooling, machines to obtain mechanical main shaft finished product.
Different from traditional spindle processing technique, the present invention is in alloy process, using side associated with refinement, purification
Method is modified alloy.And conventional process for refining be usually directly by fining agent and alloy raw material mixed melting, or it is direct
Fining agent is poured into aluminium alloy and is stirred, still, conventional thinning method not can completely refining alloy, to alloy
Performance boost is also not apparent.The present invention is that fining agent is laid on to aluminium alloy surface, and since the temperature on aluminium alloy surface is low
Inside aluminium alloy, fining agent can first carry out preliminary refinement with aluminium alloy surface layer and react, and forming surface layer cured layer, (skin temperature is faced
When reduce), which is mainly made of fining agent, and a small amount of alloy compositions can be wrapped in fining agent outer layer, then by cured layer
It is pressed into inside aluminium alloy, is not in that fining agent connects with alloying component large area since fining agent outer layer is consistent with alloying component
When touching, it is possible to create repulsion (be embodied in fining agent dough, rather than mutually melt with alloying component) phenomenon, cause refinement lose
It loses.As for purification process, due to inevitably there are alloy inclusions in alloy system, the content of field trash is higher, to reduction alloy
Performance is more obvious, and common alloy purification technique be directly cleanser is added in aluminium alloy to react, but directly
Addition reaction, be difficult so that Integral alloy can be cleaned.So the present invention combined using jet with cleanser it is compound
Purification process carries out alloy purification processing, the volume fraction of alloy inclusions can be effectively reduced, and improve alloy mechanical property.
And mechanical main shaft after shaping, the heat treatment that 3-4h is kept the temperature at 600-650 DEG C is also carried out, it is above-mentioned thin to cooperate
Change, purification process, combines three organically, further improve the structure property and plasticity of alloy.
Preferably, step (2) described refining agent includes one of coal dust, calcirm-fluoride, sodium nitrate or a variety of.Refining agent
It needs to be selected according to alloy attribute, and the partial size of coal dust is small, degree of scatter is higher, while containing higher carbon again,
While promoting alloy refinement degree, carbon content is increased, hardness is further promoted.
Preferably, rapid (2) described fining agent is boron salt step by step.
Further preferably, the boron salt includes NaBF4、B4One or both of C.
The selection of fining agent largely affects the effect of refinement, using boron salt, especially oxygen-free boronation
Object is closed, can utmostly avoid being mixed into oxygen element in alloy, cause damages to alloy.
Preferably, step (3) described mixed gas specifically: volume ratio He:N2The gaseous mixture of=9-9.5:1.Jet
Pure rare gas is not only used, but minimal amount of nitrogen is added, this is because nitrogen can be sent out with the fractions of alloy
Raw reaction, is equivalent to and carries out nitrogen treatment to alloy, can be obviously improved the strength and stiffness of alloy.
Preferably, the valve opening diameter of step (3) described multiple-way valve be 0.25-0.35mm, revolving speed 100-120r/min,
Spray air flow is 2.4-3L/min.
Preferably, being also contaminated with cleanser in step (3) described mixed gas, the cleanser includes B2H6、C2Cl6、
CaCl2, one of KCl, NaCl or a variety of.
Valve opening diameter, revolving speed, the spray air flow of multiple-way valve are both needed to strict control, excessive, and will cause cleanser cannot be abundant
It is reacted with alloy, effect can not be played, it is too small, then cleanser can not be uniformly delivered to each part of alloy system,
Clean-up effect is lower.And the selection of cleanser, the present invention is in such a way that gas class cleanser is mixed with fine crystalline body, gas
Class cleanser fluid ability is big, is easy loss to each part of alloy, crystalline solid can then promote clean-up effect.
Preferably, the component and mass percent of the alloy pig are as follows: C:0.1-0.3%, Si:0.12-0.18%,
Mn:0.04-0.1%, Mg:0.06-0.1%, Tl:0.02-0.06%, surplus are Fe and inevitable impurity.
Compared with prior art, the present invention has the advantage that
(1) process for refining of the invention is different from traditional process for refining, and specific thinning process can be with the object of fining agent
State variation, promotes the combination degree of fining agent and alloy, promotes thinning effect.
(2) present invention uses composite purifying process of the jet in conjunction with cleanser, comprehensive can spread to entire alloy body
System avoids alloy purification uneven.
(3) present invention is organically combined refinement, purification, heat treatment three, the further sense of organization for promoting alloy,
Mechanical property and plasticity.
(4) present invention is not only to promote the performance of alloy by changing the ingredient of fining agent, cleanser, even more from thin
Change and start with on the concrete technology of purification, change the fracture mechanism of alloy, enhance the weatherability of main shaft, is suitable for a variety of building rings
Border.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.2%, Si:0.15%, Mn:0.07%, Mg:0.08%, Tl:0.04%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 3:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:2 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.3:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 15:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.3mm, revolving speed 110r/min, spray air flow 2.7L/min；
Molding: injecting mold for purified aluminium alloy, after cooling, then keep the temperature 3.5h at 630 DEG C, natural cooling, warp
Machine to obtain mechanical main shaft finished product.
Embodiment 2
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.3%, Si:0.18%, Mn:0.1%, Mg:0.1%, Tl:0.06%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 3:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:2 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.3:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 15:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.3mm, revolving speed 110r/min, spray air flow 2.7L/min；
Molding: injecting mold for purified aluminium alloy, after cooling, then keep the temperature 3.5h at 630 DEG C, natural cooling, warp
Machine to obtain mechanical main shaft finished product.
Embodiment 3
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.1%, Si:0.12%, Mn:0.04%, Mg:0.06%, Tl:0.02%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 3:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:2 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.3:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 15:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.3mm, revolving speed 110r/min, spray air flow 2.7L/min；
Molding: injecting mold for purified aluminium alloy, after cooling, then keep the temperature 3.5h at 630 DEG C, natural cooling, warp
Machine to obtain mechanical main shaft finished product.
Embodiment 4
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.2%, Si:0.15%, Mn:0.07%, Mg:0.08%, Tl:0.04%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 2:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:1 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.3:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 15:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.3mm, revolving speed 110r/min, spray air flow 2.7L/min；
Molding: injecting mold for purified aluminium alloy, after cooling, then keep the temperature 3.5h at 630 DEG C, natural cooling, warp
Machine to obtain mechanical main shaft finished product.
Embodiment 5
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.2%, Si:0.15%, Mn:0.07%, Mg:0.08%, Tl:0.04%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 4:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:3 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.3:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 15:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.3mm, revolving speed 110r/min, spray air flow 2.7L/min；
Molding: injecting mold for purified aluminium alloy, after cooling, then keep the temperature 3.5h at 630 DEG C, natural cooling, warp
Machine to obtain mechanical main shaft finished product.
Embodiment 6
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.2%, Si:0.15%, Mn:0.07%, Mg:0.08%, Tl:0.04%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 3:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:2 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9:1 is sprayed by valve opening
Out, meanwhile, the B that volume ratio is 10:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multiple-way valve
Valve opening diameter be 0.25mm, revolving speed 100r/min, spray air flow 2.4L/min；
Molding: purified aluminium alloy is injected into mold, after cooling, then keeps the temperature 3h at 600 DEG C, natural cooling, through machine
Process to obtain mechanical main shaft finished product.
Embodiment 7
Alloy smelting: by alloy pig blanking, melting forms aluminium alloy, wherein the component and mass percent of alloy pig are as follows:
C:0.2%, Si:0.15%, Mn:0.07%, Mg:0.08%, Tl:0.04%, surplus are Fe and inevitable impurity；
Refinement: coal dust, calcirm-fluoride, the admixture refining agent that sodium nitrate mass ratio is 3:1:1 are added into aluminium alloy and carries out essence
Refining processing, then the NaBF for being 1:2 by mass ratio4、B4C mixed refining agent pours into aluminium alloy, waits fining agents solid on aluminium alloy surface
After change, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
Purification: multiple-way valve is placed in mixed molten liquid, then by volume ratio He:N2The mixed gas of=9.5:1 passes through valve opening
It sprays, meanwhile, the B that volume ratio is 20:2:1 is also contaminated in mixed gas2H6、C2Cl6, KCl mixing cleanser, wherein multi-pass
The valve opening diameter of valve is 0.35mm, revolving speed 120r/min, spray air flow 3L/min；
Molding: purified aluminium alloy is injected into mold, after cooling, then keeps the temperature 4h at 650 DEG C, natural cooling, through machine
Process to obtain mechanical main shaft finished product.
Embodiment 8
Difference with embodiment 1 is only that 8 refining agent of embodiment is only coal dust.
Embodiment 9
Difference with embodiment 1 is only that 9 fining agent of embodiment is only NaBF4。
Embodiment 10
Difference with embodiment 1 is only that, gaseous mixture volume ratio He:N when embodiment 10 purifies2=8:1.
Embodiment 11
Difference with embodiment 1 is only that, gaseous mixture volume ratio He:N when embodiment 11 purifies2=10:1.
Embodiment 12
Difference with embodiment 1 is only that the valve opening diameter of 12 multiple-way valve of embodiment is 0.2mm.
Embodiment 13
Difference with embodiment 1 is only that the valve opening diameter of 13 multiple-way valve of embodiment is 0.4mm.
Embodiment 14
Difference with embodiment 1 is only that the revolving speed of 14 multiple-way valve of embodiment is 90r/min.
Embodiment 15
Difference with embodiment 1 is only that the revolving speed of 15 multiple-way valve of embodiment is 130r/min.
Embodiment 16
Difference with embodiment 1 is only that the spray air flow of 16 multiple-way valve of embodiment is 2L/min.
Embodiment 17
Difference with embodiment 1 is only that the spray air flow of 17 multiple-way valve of embodiment is 4L/min.
Embodiment 18
Difference with embodiment 1 is only that, cleanser KCl is contained only in the mixed gas of embodiment 18.
Comparative example 1
Difference with embodiment 1 is only that comparative example 1 is without refining treatment.
Comparative example 2
Difference with embodiment 1 is only that directly fining agent and aluminium alloy are mixed for comparative example 2.
Comparative example 3
Difference with embodiment 1 is only that comparative example 3 does not add fining agent.
Comparative example 4
Difference with embodiment 1 is only that, is free of cleanser when comparative example 4 purifies in gaseous mixture.
The product of embodiment 1-18 and comparative example 1-4 are tested, its hardness, intensity, toughness and elongation are tested, is tied
Fruit is as shown in table 1:
Table 1: the performance of product in embodiment 1-18 and comparative example 1-4
As can be seen from the table, the missing (lacking process for refining), the missing of cleanser of fining agent (lack net
Chemical industry skill), will cause the sharp fall of the comprehensive performance of product, only using and be combined refinement and purification process,
It can guarantee that the performance of product is more protruded compared with ordinary metallurgical technique.
It is skilled to this field although present invention has been described in detail and some specific embodiments have been cited
For technical staff, as long as it is obvious for can making various changes or correct without departing from the spirit and scope of the present invention.
Claims (8)
1. the processing technology of mechanical main shaft, which is characterized in that the technique includes the following steps:
(1) alloy smelting: by alloy pig blanking, melting forms aluminium alloy；
(2) it refines: refining agent being added into aluminium alloy and carries out refining treatment, then fining agent is poured into aluminium alloy, waits fining agents
After aluminium alloy surface cure, it is pressed into aluminium alloy and stirs to obtain mixed molten liquid；
(3) it purifies: multiple-way valve is placed in mixed molten liquid, then mixed gas is sprayed by valve opening, control the revolving speed of multiple-way valve
And jet parameter；
(4) it forms: purified aluminium alloy being injected into mold, through cooling, machines to obtain mechanical main shaft finished product.
2. the processing technology of mechanical main shaft according to claim 1, which is characterized in that step (2) described refining agent includes
One of coal dust, calcirm-fluoride, sodium nitrate are a variety of.
3. the processing technology of mechanical main shaft according to claim 1, which is characterized in that step (2) fining agent is boron
Salt.
4. the processing technology of mechanical main shaft according to claim 3, which is characterized in that the boron salt includes NaBF4、B4In C
One or two.
5. the processing technology of mechanical main shaft according to claim 1, which is characterized in that step (3) the mixed gas tool
Body are as follows: volume ratio He:N2The gaseous mixture of=9-9.5:1.
6. the processing technology of mechanical main shaft according to claim 1, which is characterized in that the valve of step (3) described multiple-way valve
Bore dia is 0.25-0.35mm, revolving speed 100-120r/min, spray air flow 2.4-3L/min.
7. the processing technology of mechanical main shaft according to claim 1, which is characterized in that in step (3) described mixed gas
It is also contaminated with cleanser, the cleanser includes B2H6、C2Cl6、CaCl2, one of KCl, NaCl or a variety of.
8. the processing technology of mechanical main shaft according to claim 1, which is characterized in that the component and quality of the alloy pig
Percentage are as follows: C:0.1-0.3%, Si:0.12-0.18%, Mn:0.04-0.1%, Mg:0.06-0.1%, Tl:0.02-
0.06%, surplus is Fe and inevitable impurity.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884922.1A CN109136749B (en) | 2018-08-06 | 2018-08-06 | Machining process of mechanical main shaft |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810884922.1A CN109136749B (en) | 2018-08-06 | 2018-08-06 | Machining process of mechanical main shaft |
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| CN109136749A true CN109136749A (en) | 2019-01-04 |
| CN109136749B CN109136749B (en) | 2020-06-23 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709993A (en) * | 1951-04-06 | 1954-06-02 | Julius S W Bates | Below-surface treatment of molten metals |
| JPS5170129A (en) * | 1974-11-11 | 1976-06-17 | Jones & Laughlin Steel Corp | Yojukoni hannodonotakaibutsushitsuo konnyusuruhoho |
| CN102230054A (en) * | 2010-04-28 | 2011-11-02 | 鞍钢集团矿业公司 | Novel process for producing super high manganese steel casting |
| CN105331904A (en) * | 2015-11-05 | 2016-02-17 | 宁国市南方耐磨材料有限公司 | Preparation method of high-manganese low-chromium alloy wear-resisting ball |
-
2018
- 2018-08-06 CN CN201810884922.1A patent/CN109136749B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB709993A (en) * | 1951-04-06 | 1954-06-02 | Julius S W Bates | Below-surface treatment of molten metals |
| JPS5170129A (en) * | 1974-11-11 | 1976-06-17 | Jones & Laughlin Steel Corp | Yojukoni hannodonotakaibutsushitsuo konnyusuruhoho |
| CN102230054A (en) * | 2010-04-28 | 2011-11-02 | 鞍钢集团矿业公司 | Novel process for producing super high manganese steel casting |
| CN105331904A (en) * | 2015-11-05 | 2016-02-17 | 宁国市南方耐磨材料有限公司 | Preparation method of high-manganese low-chromium alloy wear-resisting ball |
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| CN109136749B (en) | 2020-06-23 |
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