CN107475499A - A kind of preparation method of sledge runner shaped steel - Google Patents
A kind of preparation method of sledge runner shaped steel Download PDFInfo
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- CN107475499A CN107475499A CN201710663103.XA CN201710663103A CN107475499A CN 107475499 A CN107475499 A CN 107475499A CN 201710663103 A CN201710663103 A CN 201710663103A CN 107475499 A CN107475499 A CN 107475499A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 85
- 239000010959 steel Substances 0.000 title claims abstract description 85
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000000137 annealing Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 48
- 238000010791 quenching Methods 0.000 claims description 26
- 230000000171 quenching effect Effects 0.000 claims description 26
- 238000010792 warming Methods 0.000 claims description 20
- 238000002791 soaking Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 7
- 238000007654 immersion Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 2
- 238000013019 agitation Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 3
- 238000005275 alloying Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000007812 deficiency Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- NIPNSKYNPDTRPC-UHFFFAOYSA-N N-[2-oxo-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 NIPNSKYNPDTRPC-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000004575 stone Substances 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
- C21D1/18—Hardening; Quenching with or without subsequent 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
- C21D1/34—Methods of heating
- C21D1/42—Induction heating
-
- 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
-
- 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
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention provides a kind of preparation method of sledge runner shaped steel, using the mode of first integrally annealed, then differential annealing, sledge runner shaped steel is also ensure that the elastic performance in fore wing portion while enough intensity and hardness is obtained.By heating up and cooling stage by stage in heat treatment process, it is ensured that the overall uniformity of slide plate shaped steel, avoid and the problems such as surface defect and stress concentration occur.The shaped steel of the present invention employs specific alloying element and proportioning, on the basis of conventional skates steel, Mn, Ni, Cr, Co content are all adjusted, especially for strong hardness and the relation of elasticity, the content of Cr elements is reduced, so that final shaped steel product obtains good combination property.
Description
Technical field
The present invention relates to winter sports instrument field, is to be related to a kind of preparation method of sledge runner shaped steel specifically.
Background technology
Modern bobsleighing is as seven big event of Winter Olympic Games（Ice hockey, curling stone, biathlon, skating, skiing and snow
Car, sled）One of, its species can much be divided into no rudder and have rudder, single sledge and wide sledge, striding type and horizontal, also traction, it is electronic and
Sail etc..The bottom surface slide plate of sled is usually shaped steel material, and the slide plate be arranged in parallel for a pair or so, and length must not exceed 45 lis
Rice, the fore wing portion of slide plate needs to keep certain elasticity, in favor of turning and manipulating.
In order to reach the requirement of bobsleighing, shaped steel used in sledge runner needs have good mechanical performance and table
Face quality.Shaped steel surface can not have the defects of crackle, bubble, field trash, can have during application certain intensity, wearability and
Elasticity.In the prior art, using the heat treatment of routine, forging, the technique such as cutting, frequently can lead to the wearability of shaped steel product compared with
Low or intensity and elasticity deficiency, it is difficult to while meet composite request of the slide plate to performance.Intensity and the caused slide plate that wears no resistance
Blade deforms, and the elasticity deficiency in slide plate fore wing portion, can all directly affect the service life and performance of sledge runner finished product, also unfavorable
In horizontal performance of the sportsman in event.
The content of the invention
In order to solve the problems, such as the combination property of sledge runner shaped steel, the invention provides a kind of preparation of sledge runner shaped steel
Method, while enabling sledge runner that there is higher anti-wear performance and intensity, it can also obtain enough local elasticities.
A kind of preparation method of sledge runner shaped steel, it is characterised in that：The C content of the sledge runner shaped steel is 0.35%
~0.40%；Its preparation method comprises the following steps：
A. integrally annealed：The shaped steel workpiece of machine-shaping is fitted into heating furnace, 800~850 DEG C of soaking times be 0.5~
1.5h, integrally annealed is carried out, is air-cooled to room temperature afterwards；
B. differential annealing：By the way of sensing heating, to the one end of shaped steel workpiece as product fore wing portion after integrally annealed
Local heating is carried out, then this locally carries out water quenching；
C. water quenching：The part of shaped steel workpiece differential annealing is immersed in the water, water stirred during quenching；
D. it is tempered：Shaped steel workpiece after water quenching is again loaded into heating furnace, 1 ~ 2h is incubated at 500 ~ 600 DEG C, is then air-cooled to
Room temperature, you can obtain sledge runner shaped steel finished product.
The tensile strength of the sledge runner shaped steel finished product reaches 200 ~ 220MPa, and hardness is up to 55 ~ 60HRC.
The sledge runner shaped steel forms comprising following element：C:0.35-0.40%, Si:0.80-1.20%, Mn:0.50-
1.50%, Ni:0.50-1.00%, Cr:2.50-3.50%, Co:0.10-0.50%, surplus are Fe and inevitable impurity.
In the step a, the shaped steel workpiece of machine-shaping is fitted into heating furnace, at the uniform velocity it is warming up to 350 in 3~5h~
450 DEG C, it is incubated 1~2h；800~850 DEG C are warming up to 30~50 DEG C/h again, soaking time is 0.5~1.5h, then first with 10
~20 DEG C/h cools to 400~500 DEG C with the furnace, is incubated 2~3h；Again 150~200 DEG C are cooled to the furnace with 50~80 DEG C/h, it
After be air-cooled to room temperature.
In the step b, by the way of sensing heating, to the shaped steel workpiece after integrally annealed as product fore wing portion
One end carries out local heating, and heating-up temperature is 600~650 DEG C, and soaking time is 2.5~3.0h, and then this locally carries out water quenching.
In the step c, the part of shaped steel workpiece differential annealing is immersed in the water, water temperature is 25~30 DEG C before immersion, and
Water temperature is no more than 50 DEG C after workpiece takes out, and water is stirred during quenching, be cooled to when workpiece takes out from water 150 DEG C with
Under.
In the step d, the shaped steel workpiece after water quenching is again loaded into heating furnace, is first warming up to 200 ~ 300 through 1~2h
DEG C, it is incubated 2 ~ 4h；500 ~ 600 DEG C are warming up to 30 ~ 50 DEG C/h again, 1 ~ 2h is incubated, is then air-cooled to room temperature, you can obtain sled
Slide plate shaped steel finished product.
The present invention uses first integrally annealed, then the mode of differential annealing, sledge runner shaped steel is being obtained enough
While intensity and hardness, the elastic performance in fore wing portion also ensure that.By heating up and cooling stage by stage in heat treatment process, really
The overall uniformity of slide plate shaped steel has been protected, has avoided and the problems such as surface defect and stress concentration occurs.The shaped steel of the present invention uses
Specific alloying element and proportioning, on the basis of conventional skates steel, are all adjusted to Mn, Ni, Cr, Co content,
Especially for strong hardness and the relation of elasticity, the contents of Cr elements is reduced, so that final shaped steel product obtains well
Combination property.
Embodiment
With reference to embodiment and comparative example, the present invention is described in more detail.
Embodiment 1：
A kind of preparation method of sledge runner shaped steel, it is characterised in that：The sledge runner shaped steel forms comprising following element：C:
0.35%, Si:0.80%, Mn:0.50%, Ni:0.50%, Cr:2.50%, Co:0.10%, surplus is Fe and inevitable impurity；
Its preparation method comprises the following steps：
A. integrally annealed：The shaped steel workpiece of machine-shaping is fitted into heating furnace, 450 DEG C are at the uniform velocity warming up in 3h, is incubated 2h；
800 DEG C, soaking time 0.5h are warming up to 50 DEG C/h again, then first cools to 400 DEG C with the furnace with 20 DEG C/h, is incubated 3h；Again
150 DEG C are cooled to the furnace with 50 DEG C/h, are air-cooled to room temperature afterwards；
B. differential annealing：By the way of sensing heating, to the one end of shaped steel workpiece as product fore wing portion after integrally annealed
Local heating is carried out, heating-up temperature is 650 DEG C, soaking time 2.5h, and then this locally carries out water quenching；
C. water quenching：The part of shaped steel workpiece differential annealing is immersed in the water, water temperature is 30 DEG C before immersion, and water temperature after workpiece taking-up
Water is stirred no more than 50 DEG C, during quenching, less than 150 DEG C are cooled to when workpiece takes out from water；
D. it is tempered：Shaped steel workpiece after water quenching is again loaded into heating furnace, is first warming up to 300 DEG C through 1h, is incubated 4h；Again with 30
DEG C/h is warming up to 500 DEG C, 2h is incubated, is then air-cooled to room temperature, you can obtain sledge runner shaped steel finished product.
The tensile strength of the sledge runner shaped steel finished product reaches 220MPa, and hardness reaches 60HRC.
Embodiment 2：
A kind of preparation method of sledge runner shaped steel, it is characterised in that：The sledge runner shaped steel forms comprising following element：C:
0.40%, Si:0.80%, Mn:1.50%, Ni:1.00%, Cr:2.50%, Co:0.50%, surplus is Fe and inevitable impurity；
Its preparation method comprises the following steps：
A. integrally annealed：The shaped steel workpiece of machine-shaping is fitted into heating furnace, 350 DEG C are at the uniform velocity warming up in 3h, is incubated 1h；
850 DEG C, soaking time 0.5h are warming up to 30 DEG C/h again, then first cools to 500 DEG C with the furnace with 10 DEG C/h, is incubated 3h；Again
200 DEG C are cooled to the furnace with 80 DEG C/h, are air-cooled to room temperature afterwards；
B. differential annealing：By the way of sensing heating, to the one end of shaped steel workpiece as product fore wing portion after integrally annealed
Local heating is carried out, heating-up temperature is 600 DEG C, soaking time 3.0h, and then this locally carries out water quenching；
C. water quenching：The part of shaped steel workpiece differential annealing is immersed in the water, water temperature is 30 DEG C before immersion, and water temperature after workpiece taking-up
Water is stirred no more than 50 DEG C, during quenching, less than 150 DEG C are cooled to when workpiece takes out from water；
D. it is tempered：Shaped steel workpiece after water quenching is again loaded into heating furnace, is first warming up to 200 DEG C through 2h, is incubated 3h；Again with 40
DEG C/h is warming up to 500 DEG C, 2h is incubated, is then air-cooled to room temperature, you can obtain sledge runner shaped steel finished product.
The tensile strength of the sledge runner shaped steel finished product reaches 220MPa, and hardness reaches 55HRC.
Embodiment 3：
A kind of preparation method of sledge runner shaped steel, it is characterised in that：The sledge runner shaped steel forms comprising following element：C:
0.35%, Si:0.90%, Mn:1.00%, Ni:0.80%, Cr:3.00%, Co:0.70%, surplus is Fe and inevitable impurity；
Its preparation method comprises the following steps：
A. integrally annealed：The shaped steel workpiece of machine-shaping is fitted into heating furnace, 380 DEG C are at the uniform velocity warming up in 4h, is incubated 2h；
820 DEG C, soaking time 0.5h are warming up to 40 DEG C/h again, then first cools to 450 DEG C with the furnace with 15 DEG C/h, is incubated 2h；Again
180 DEG C are cooled to the furnace with 60 DEG C/h, are air-cooled to room temperature afterwards；
B. differential annealing：By the way of sensing heating, to the one end of shaped steel workpiece as product fore wing portion after integrally annealed
Local heating is carried out, heating-up temperature is 600 DEG C, soaking time 2.5h, and then this locally carries out water quenching；
C. water quenching：The part of shaped steel workpiece differential annealing is immersed in the water, water temperature is 25 DEG C before immersion, and water temperature after workpiece taking-up
Water is stirred no more than 50 DEG C, during quenching, less than 150 DEG C are cooled to when workpiece takes out from water；
D. it is tempered：Shaped steel workpiece after water quenching is again loaded into heating furnace, is first warming up to 250 DEG C through 1h, is incubated 2h；Again with 40
DEG C/h is warming up to 550 DEG C, 1h is incubated, is then air-cooled to room temperature, you can obtain sledge runner shaped steel finished product.
The tensile strength of the sledge runner shaped steel finished product reaches 200MPa, and hardness reaches 58HRC.
Comparative example 1：
By the shaped steel with same elemental composition of the invention and content, without double annealing, or other processing steps change
Afterwards, the tensile strength of resulting sledge runner shaped steel is significantly lower than 180MPa, and local elasticity is poor.
Comparative example 2：
The shaped steel of elemental composition and content of the present invention is will differ from, after being prepared using processing step same as the present application, gained
To the strong hardness of sledge runner shaped steel be difficult to meet the requirements, also, 60 HRC can also be reached even if hardness, its local elasticity
It is obvious poor.
Comparative example 3：
By elemental composition and content shaped steel workpiece same as Example 1, obtained using the heat treatment different from the application
During local elasticity's performance, the tensile strength and hardness of the sledge runner shaped steel obtained by it are difficult to meet combination property requirement, and
And the surface quality of shaped steel is poor, hence it is evident that reduces the service life of product.
At the elemental composition selection of sledge runner shaped steel of the present invention it can be seen from embodiment 1-3 and comparative example 1-3 and heat
Science and engineering sequence, it is that applicant verifies by repeated tests.Wherein, the elemental composition proportioning of shaped steel is in conventional skates steel
On the basis of material, Mn, Ni, Cr, Co content are all adjusted, especially for strong hardness and the relation of elasticity, reduced
The content of Cr elements, so that final shaped steel product obtains good combination property.In technique, using first integrally annealed, then
The mode of differential annealing, sledge runner shaped steel is set to also ensure that fore wing portion while enough intensity and hardness is obtained
Elastic performance.By heating up and cooling stage by stage in heat treatment process, it is ensured that the overall uniformity of slide plate shaped steel, avoid
There is the problems such as surface defect and stress concentration.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (6)
- A kind of 1. preparation method of sledge runner shaped steel, it is characterised in that：The C content of the sledge runner shaped steel 0.35%~ 0.40%；Its preparation method comprises the following steps：A. integrally annealed：The shaped steel workpiece of machine-shaping is fitted into heating furnace, 800~850 DEG C of soaking times be 0.5~ 1.5h, integrally annealed is carried out, is air-cooled to room temperature afterwards；B. differential annealing：By the way of sensing heating, to the one end of shaped steel workpiece as product fore wing portion after integrally annealed Local heating is carried out, then this locally carries out water quenching；C. water quenching：The part of shaped steel workpiece differential annealing is immersed in the water, water stirred during quenching；D. it is tempered：Shaped steel workpiece after water quenching is again loaded into heating furnace, 1 ~ 2h is incubated at 500 ~ 600 DEG C, is then air-cooled to Room temperature, you can obtain sledge runner shaped steel finished product；The tensile strength of the sledge runner shaped steel finished product reaches 200 ~ 220MPa, and hardness is up to 55 ~ 60HRC.
- 2. preparation method according to claim 1, it is characterised in that：The sledge runner shaped steel includes following element group Into：C:0.35-0.40%, Si:0.80-1.20%, Mn:0.50-1.50%, Ni:0.50-1.00%, Cr:2.50-3.50%, Co: 0.10-0.50%, surplus are Fe and inevitable impurity.
- 3. preparation technology according to claim 1, it is characterised in that：In the step a, by the shaped steel workpiece of machine-shaping It is fitted into heating furnace, 350~450 DEG C is at the uniform velocity warming up in 3~5h, is incubated 1~2h；Again 800 are warming up to 30~50 DEG C/h ~850 DEG C, soaking time is 0.5~1.5h, then first cools to 400~500 DEG C with the furnace with 10~20 DEG C/h, is incubated 2~3h； 150~200 DEG C are cooled to the furnace with 50~80 DEG C/h, be air-cooled to room temperature afterwards again.
- 4. preparation method according to claim 1, it is characterised in that：In the step b, by the way of sensing heating, Local heating is carried out as the one end in product fore wing portion to the shaped steel workpiece after integrally annealed, heating-up temperature is 600~650 DEG C, Soaking time is 2.5~3.0h, and then this locally carries out water quenching.
- 5. the preparation method according to Claims 1-4, it is characterised in that：In the step c, shaped steel workpiece is locally moved back The part of fire is immersed in the water, and water temperature is 25~30 DEG C before immersion, and workpiece take out after water temperature be no more than 50 DEG C, water is entered during quenching Row agitation, less than 150 DEG C are cooled to when workpiece takes out from water.
- 6. the preparation method according to claim 1 to 6, it is characterised in that：In the step d, by the shaped steel work after water quenching Part is again loaded into heating furnace, is first warming up to 200 ~ 300 DEG C through 1~2h, is incubated 2 ~ 4h；500 are warming up to 30 ~ 50 DEG C/h again ~ 600 DEG C, 1 ~ 2h is incubated, is then air-cooled to room temperature, you can obtain sledge runner shaped steel finished product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283204A (en) * | 2020-02-18 | 2020-06-16 | 北京科技大学 | Preparation method of chromium-molybdenum-vanadium type quick-skating skates material |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031399A2 (en) * | 1979-07-30 | 1981-07-08 | Consultronic (Int.)Ltd. | Material for the production of stainless Alpine ski edges |
| CN1299722A (en) * | 2000-12-26 | 2001-06-20 | 常州市钢筘厂 | Production process of metal rack |
| CN101380712A (en) * | 2008-10-16 | 2009-03-11 | 朱晓明 | Production method of steel edge |
-
2017
- 2017-08-05 CN CN201710663103.XA patent/CN107475499B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0031399A2 (en) * | 1979-07-30 | 1981-07-08 | Consultronic (Int.)Ltd. | Material for the production of stainless Alpine ski edges |
| CN1299722A (en) * | 2000-12-26 | 2001-06-20 | 常州市钢筘厂 | Production process of metal rack |
| CN101380712A (en) * | 2008-10-16 | 2009-03-11 | 朱晓明 | Production method of steel edge |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111283204A (en) * | 2020-02-18 | 2020-06-16 | 北京科技大学 | Preparation method of chromium-molybdenum-vanadium type quick-skating skates material |
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