CN108103395B - A kind of non-hardened and tempered steel thrust wheel and preparation method thereof - Google Patents
A kind of non-hardened and tempered steel thrust wheel and preparation method thereof Download PDFInfo
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- CN108103395B CN108103395B CN201711169368.0A CN201711169368A CN108103395B CN 108103395 B CN108103395 B CN 108103395B CN 201711169368 A CN201711169368 A CN 201711169368A CN 108103395 B CN108103395 B CN 108103395B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 34
- 239000010959 steel Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000005242 forging Methods 0.000 claims abstract description 42
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 15
- 230000006698 induction Effects 0.000 claims abstract description 13
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 23
- 230000008569 process Effects 0.000 abstract description 13
- 239000003607 modifier Substances 0.000 abstract description 8
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 2
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000010791 quenching Methods 0.000 description 10
- 230000000171 quenching effect Effects 0.000 description 10
- 238000005299 abrasion Methods 0.000 description 4
- 229910001563 bainite Inorganic materials 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910001562 pearlite Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
- C21D1/10—Surface hardening by direct application of electrical or wave energy; by particle radiation by electric induction
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/005—Modifying the physical properties by deformation combined with, or followed by, heat treatment of ferrous alloys
-
- 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
- C21D9/34—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tyres; for rims
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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
- C22C38/04—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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/38—Ferrous alloys, e.g. steel alloys containing chromium with more than 1.5% by weight of 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
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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- 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
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Abstract
The invention discloses a kind of non-hardened and tempered steel thrust wheel and preparation method thereof, which is prepared using a kind of non-hardened and tempered steel that forges haveing excellent performance, forged heating, forging, control cooling, and surface induction hardening processing obtains finished product thrust wheel.With tradition it is quenched+surface induction hardening thrust wheel preparation process compared with, this thrust wheel preparation method eliminates modifier treatment process, reduces energy consumption and discharging of waste liquid, is beneficial to energy conservation environmental protection, be beneficial to reduce production cost and shorten the production cycle.
Description
Technical field
The present invention relates to technical field of engineering machinery, and in particular to a kind of non-hardened and tempered steel thrust wheel and preparation method thereof.
Background technique
Thrust wheel is the important component of tracked construction equipment walking mechanism, and main function is support equipment self weight and lotus
It carries, crawler belt is allowed to walk along wheel.Crawler equipment biggish for tonnage, such as large-tonnage excavator, crane, thrust wheel
Need to have good comprehensive mechanical property and surface abrasion resistance.
Currently, the thrust wheel multiselect materials such as 50Mn, 40Mn2,42CrMo, are formed using casting or forging technology, it is mechanical
After roughing, preferably whole synthesis mechanical property is obtained by modifier treatment, is then handled using surface hardening, makes to take turns body surface
Surface hardness reaches 45HRC ~ 55HRC, increases the surface abrasion resistance of thrust wheel with this.The thrust wheel of technique preparation has good
Comprehensive mechanical property and surface abrasion resistance, but heating for multiple times is needed in its process, energy consumption is very big.Modifier treatment
Journey not only needs to expend mass energy, also needs consumption water, special quenching oil etc., is unfavorable for energy saving and protection environment.
Non-hardened and tempered steel, which is not required to modifier treatment, can be obtained excellent comprehensive mechanical property.Common non-hardened and tempered steel passes through addition
Vanadium, titanium, Nb-microalloying element form tiny carbide and nitride and achieve the purpose that strengthen steel, and room temperature texture is thin
Small pearlite and ferrite, comprehensive mechanical property is more excellent, is applied to automobile shaft forgings, rod-like member at present more.It is cold by controlling
But, the yield strength of such non-hardened and tempered steel can reach 600MPa ~ 700MPa, still have gap with high-quality quenched and tempered steel.In recent years, high-strength
Bainitic Steels, the martensite non-hardened and tempered steel of type are quickly grown, and have expanded the application range of non-hardened and tempered steel.For Micro Alloying
Steel forgings, traditional cooling means are to be cooled down or taken in air simple Insulation for hot forging placement, should
Method has some disadvantages and deficiency, is in particular in: the hardness and mechanical property of forging are difficult to control, and external environment is to most
The performance of whole components is affected, high rejection rate.
In order to obtain excellent comprehensive mechanical property and surface abrasion resistance, crawler type walking mechanism thrust wheel tradition heat
Treatment process means are quenched+surface induction hardening.Traditional quenched+surface induction hardening treatment process, thrust wheel blank add
After warm and hot forging molding, heat preservation quenching and tempering processing need to be reheated, after obtaining good comprehensive mechanical property, again to Zhi Chong
The working face of wheel carries out induction hardening, and the working face of high rigidity, high-wear resistance is obtained with this.Forming parts process is more,
Long in time limit, production process needs heating for multiple times, and energy consumption is big, increases production cost.Dedicated quenching oil is needed when quenched, is quenched
Fiery liquid is unfavorable for energy-saving and emission-reduction, green production.
In order to reduce production cycle and the manufacturing cost of thrust wheel, part of the manufacturer, which develops, a kind of utilizes residual forging heat to carry out
The thrust wheel preparation method of quenching strengthening.The method pass through controlled forge process after waste heat supply temperature, directly adopt remnant forging thermal quenching+
Lonneal technique obtains the thrust wheel finished product with certain degree of hardness.This method only needs primary heating from blank to final finished
Quenching, improves the utilization efficiency of the energy, significantly reduces production energy consumption and manufacturing cost.
The preparation method that quenching strengthening obtains thrust wheel is carried out using residual forging heat, process is less, and energy utilization rate is high.But
There are still following problems in practical applications for the process: (1) when thrust wheel size is larger, since each position cooling rate is different
It causes and causes each spot temperature uneven, do not harden so as to cause regional area and different parts quenching distortion is non-uniform asks
Topic；(2) presence of forging surface scale reduces face-hardened quality, easily quenching soft spot occurs and influence the resistance to of components
Grind performance；(3) thrust wheel heat treatment process is integral quenching+lonneal, and work surface hardness is generally 45HRC ~ 55HRC,
It is difficult to obtain higher work surface hardness.
Summary of the invention
Purpose: in order to overcome the deficiencies in the prior art, the present invention provides a kind of non-hardened and tempered steel thrust wheel and its system
Preparation Method, the preparation method are not required to carry out quenched process, reduce energy consumption and production cost.It is obtained using the preparation method
Non-hardened and tempered steel thrust wheel, yield strength are not less than 800MPa, and tensile strength is not less than 900MPa, and elongation after fracture is not less than 11%,
Comprehensive mechanical property is excellent, can meet in large tonnage crawler engineering machinery to the mechanical property requirements of thrust wheel.Using the system
The thrust wheel that Preparation Method obtains, for the surface hardness that works up to 55HRC ~ 61HRC, wear-resisting property is excellent.
Technical solution: in order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of manufacturing method of non-hardened and tempered steel thrust wheel, it is characterised in that: the thrust wheel blank is that can forge Micro Alloying
Thrust wheel blank, is successively carried out Forge Heating, forging, control cooling by steel, and surface induction hardening processing obtains finished product Zhi Chong
Wheel.
Further, the non-hardened and tempered steel, by percentage to the quality, containing C:0.34 ~ 0.52%, Si:0.20 ~ 0.50%,
Mn:1.20 ~ 2.0%, S:0.04 ~ 0.07%, Cr:0.05 ~ 0.50%, V:0 ~ 0.25%, Ti:0 ~ 0.1%, B:0.0005 ~ 0.0035%,
Rest part is Fe and inevitable impurity.
Further, during the control is cooling, the relationship of the temperature and time of thrust wheel is forged are as follows: to forge preceding add
Heat is come out of the stove as start time, then: heating before forging, and --- heating is come out of the stove --- forging molding --- controll cooling after forging enters furnace --- before forging
Controll cooling after forging is come out of the stove --- enter charging basket；
Temperature when heating is come out of the stove before forging is 1150 DEG C ~ 1200 DEG C；
To 0.25min ~ 0.30min, the temperature before blocking is 1030 DEG C ~ 1080 DEG C；
To 0.65min ~ 0.80min, the temperature after finish-forging is 840 DEG C ~ 870 DEG C；
To 1.00min ~ 1.20min, temperature when controll cooling after forging enters furnace is 810 DEG C ~ 840 DEG C；
To 3.20min ~ 4.85min, temperature when controll cooling after forging is come out of the stove is 450 DEG C ~ 480 DEG C；
To 6.50min ~ 7.00min, temperature when entering material frame is 360 DEG C ~ 380 DEG C.
Further, during the control is cooling, when forging control is cold enters furnace, cooling velocity control 1.6 DEG C/s ~
It 3.0 DEG C/s, comes out of the stove until forging control is cold.After the step can guarantee that the non-hardened and tempered steel thrust wheel forging is cooling, in phase-change organization
The bainite phase for generating suitable number improves the intensity and hardness of components on the basis of guaranteeing plasticity and toughness, obtains excellent
Different comprehensive mechanical property, thus meet thrust wheel components, especially middle large tonnage crawler engineering machinery thrust wheel zero
The overall mechanical properties requirement of part.
Further, the surface induction hardening processing, it is ensured that thrust wheel work surface hardness reaches 55HRC ~ 61HRC, firmly
Change layer depth is 8mm ~ 18mm.The surface induction hardening processing is technological means well known to those skilled in the art, the present invention
To this without specifically limited.
The present invention also provides a kind of non-hardened and tempered steel thrust wheels, are prepared using the preparation method of preceding claim.
Non-hardened and tempered steel thrust wheel of the present invention can be obtained yield strength and be not less than without carrying out modifier treatment
800MPa, tensile strength are not less than 900MPa, and elongation after fracture is not less than 11%.
The thrust wheel prepared using this method, is mainly used for tracked construction equipment, such as excavator, crane, especially
Suitable for middle large tonnage crawler engineering machinery.
The utility model has the advantages that non-hardened and tempered steel thrust wheel provided by the invention and preparation method thereof, which is closed by selection
Suitable non-hardened and tempered steel raw material, the forging for meeting thrust wheel and surface induction hardening process are to the component requirements of raw material.After forging
Control cooling, obtains bainite and ferritic line and staff control, without carrying out modifier treatment, that is, obtains preferably resultant force
Performance is learned, yield strength is not less than 800MPa, and tensile strength is not less than 900MPa, and elongation after fracture is not less than 11%, in satisfaction
Mechanical property requirements of the large tonnage crawler engineering machinery to thrust wheel.The surface mid-frequency induction hardening technique that later period uses, makes
Thrust wheel obtains the hardened layer of certain depth, and surface hardness reaches 55HRC ~ 61HRC, and wear-resisting property is excellent.It is provided by the invention
Non-hardened and tempered steel thrust wheel still obtains good comprehensive mechanical property and high in the case where removing modifier treatment process
Work surface hardness.And modifier treatment process is removed, production cost on the one hand can be reduced, the production cycle is shortened, on the other hand, also
Effect reduces energy consumption and discharging of waste liquid, is conducive to environmentally protective.
Detailed description of the invention
Fig. 1 is that the forging of embodiment 1 controls cooling curve；
Fig. 2 is the micro-organization chart after the forging control of 1 thrust wheel of embodiment is cold.
Specific embodiment
The present invention will be further explained combined with specific embodiments below.
Embodiment 1
In terms of quality %, the chemical composition content of selected blank is C:0.39%, Si:0.26%, Mn:1.74%, S:
0.046%, V:0.15%, B:0.001%, surplus Fe.Forge Heating is to 1150 DEG C, 1080 DEG C of blocking temperature, final forging temperature 840
DEG C, it controls and cools down with fed to boiler, 810 DEG C of charging temperature, furnace internal control 2.0 DEG C/s of cooling velocity, control 460 DEG C of tapping temperature.
The temperature variation curve that it is forged and control is cooling is as shown in Figure 1.
Microstructure observation is carried out to the thrust wheel that the above method obtains, microscopic structure is mainly by bainite+ferrite
Composition, pattern are as shown in Figure 2.Mechanics Performance Testing is carried out to the thrust wheel that the above method obtains, test result is as follows: Rp0.2=
871MPa, Rm=983MPa, A=14.5%, impact flexibility AkV2=46.4J, hardness 274HBW, comprehensive mechanical property is excellent, meets branch
The overall mechanical properties requirement of roller body.
After thrust wheel roughing after above-mentioned forging, mid-frequency induction hardening processing, hardened depth are carried out to thrust wheel working face
10mm ~ 12mm is spent, work surface hardness 58HRC ~ 61HRC.After finish simultaneously flaw detection to thrust wheel, assemble as required,
Coating obtains final finished thrust wheel.
The thrust wheel overall mechanical properties that the embodiment obtains are excellent, and large tonnage crawler engineering machinery is to Zhi Chong in satisfaction
The mechanical property requirements of wheel, work surface hardness is high, and hardening depth is big, shows preferably wear-resisting property and whole service life.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of manufacturing method of non-hardened and tempered steel thrust wheel, it is characterised in that: the thrust wheel blank is that can forge non-hardened and tempered steel,
Thrust wheel blank is successively carried out to Forge Heating, forging, control cooling, surface induction hardening processing obtains finished product thrust wheel；
The non-hardened and tempered steel, by percentage to the quality, containing C:0.34 ~ 0.52%, Si:0.20 ~ 0.50%, Mn:1.20 ~ 2.0%,
S:0.04 ~ 0.07%, Cr:0.05 ~ 0.50%, V:0 ~ 0.25%, Ti:0 ~ 0.1%, B:0.0005 ~ 0.0035%, rest part Fe；
During the control is cooling, the relationship of the temperature and time of thrust wheel is forged are as follows: come out of the stove to forge preceding heating as the time
Starting point, then: --- heating is come out of the stove before forging, and --- controll cooling after forging goes out forging molding --- controll cooling after forging enters furnace --- for heating before forging
Furnace --- enter charging basket；
Temperature when heating is come out of the stove before forging is 1150 DEG C ~ 1200 DEG C；
To 0.25min ~ 0.30min, the temperature before blocking is 1030 DEG C ~ 1080 DEG C；
To 0.65min ~ 0.80min, the temperature after finish-forging is 840 DEG C ~ 870 DEG C；
To 1.00min ~ 1.20min, temperature when controll cooling after forging enters furnace is 810 DEG C ~ 840 DEG C；
To 3.20min ~ 4.85min, temperature when controll cooling after forging is come out of the stove is 450 DEG C ~ 480 DEG C；
To 6.50min ~ 7.00min, temperature when entering material frame is 360 DEG C ~ 380 DEG C；
During the control is cooling, when forging control is cold enters furnace, cooling velocity is controlled in 1.6 DEG C/s ~ 3.0 DEG C/s, until
Forging control is cold to come out of the stove.
2. the manufacturing method of non-hardened and tempered steel thrust wheel according to claim 1, it is characterised in that: the surface induction hardening
Processing, it is ensured that thrust wheel work surface hardness reaches 55HRC ~ 61HRC, and case depth is 8mm ~ 18mm.
3. a kind of non-hardened and tempered steel thrust wheel, it is characterised in that: the non-hardened and tempered steel thrust wheel is using of any of claims 1 or 2
The preparation method of non-hardened and tempered steel thrust wheel is prepared.
4. non-hardened and tempered steel thrust wheel according to claim 3, it is characterised in that: the surrender of the non-hardened and tempered steel thrust wheel is strong
Degree is not less than 800MPa, and tensile strength is not less than 900MPa, and elongation after fracture is not less than 11%.
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| CN110000319A (en) * | 2019-03-25 | 2019-07-12 | 芜湖万联新能源汽车零部件有限公司 | A kind of band skirt non-hardened and tempered steel piston forging and forming technology |
| CN110578096B (en) * | 2019-10-24 | 2021-04-30 | 广东韶钢松山股份有限公司 | Non-quenched and tempered steel for crankshaft, crankshaft forging and preparation process thereof |
| CN111390512B (en) * | 2020-04-07 | 2021-08-17 | 中机精密成形产业技术研究院（安徽）股份有限公司 | Non-quenched and tempered steel material for electric drive shaft and production process |
| CN112981260B (en) * | 2021-02-08 | 2021-11-30 | 上海振华港机重工有限公司 | Container crane wheel steel, container crane wheel and preparation method of container crane wheel steel |
| CN115747639A (en) * | 2022-10-28 | 2023-03-07 | 中国第一汽车股份有限公司 | Bainite non-quenched and tempered steel material, steering knuckle and preparation method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199731A (en) * | 2011-05-18 | 2011-09-28 | 马鸣图 | Composite microalloyed large-section non-quenched and tempered steel |
| CN104988295A (en) * | 2015-07-31 | 2015-10-21 | 武汉钢铁(集团)公司 | Heat treatment method for improving medium-carbon non-quenched and tempered steel connecting rod cracking performance |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199731A (en) * | 2011-05-18 | 2011-09-28 | 马鸣图 | Composite microalloyed large-section non-quenched and tempered steel |
| CN104988295A (en) * | 2015-07-31 | 2015-10-21 | 武汉钢铁(集团)公司 | Heat treatment method for improving medium-carbon non-quenched and tempered steel connecting rod cracking performance |
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