CN106282788A - A kind of piston rod wire rod and production method thereof - Google Patents
A kind of piston rod wire rod and production method thereof Download PDFInfo
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- CN106282788A CN106282788A CN201610647365.2A CN201610647365A CN106282788A CN 106282788 A CN106282788 A CN 106282788A CN 201610647365 A CN201610647365 A CN 201610647365A CN 106282788 A CN106282788 A CN 106282788A
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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
- 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
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/065—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires of ferrous alloys
-
- 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
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
-
- 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
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/009—Pearlite
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a kind of piston rod wire rod and production method thereof, belong to Ferrous Metallurgy and wire rod rolling technical field, chemical composition and the mass percent of described piston rod wire rod are as follows: C:0.43 0.47%, Si:0.20 0.30%, Mn:0.65 0.85%, P≤0.030%, S≤0.035%, Cr:0.15 0.25%, surplus is Fe and inevitable impurity.Production method specifically includes continuous casting, strand heating, wire rod rolling, wire rod refrigerating work procedure, in described wire rod rolling process, enters finishing mill temperature: 900 ± 15 DEG C ,/crimping machine temperature of entering to weave silk: 850 ± 10 DEG C.The present invention is optimized design to chemical composition and rolling mill practice, obtains moderately good mechanical property and quenching degree.
Description
Technical field
The invention belongs to Ferrous Metallurgy and wire rod rolling technical field, be specifically related to a kind of piston rod wire rod and
Production method.
Background technology
Piston rod is a kind of axial workpiece, is mainly used as in the connection member of supporting piston acting, be widely used in cylinder,
In oil cylinder, hydraulic cylinder, the effect play and transmit moment of torsion, born alternate load, its Service Environment determines piston rod steel and needs tool
There are comprehensive mechanical performance and the surface abrasion resistance such as higher intensity, toughness；Because intensity, hardness are too low, in piston rod running
It may happen that deformation；It may happen that rupture in intensity, much higher hard then piston rod running；Piston rod surface is wear-resisting
Property is poor, then can cause piston rod surface oil leakage phenomenon.It is therefore desirable to piston rod steel has suitable mechanical performance indications and through hardening
Property and can stability contorting.
At present, on market, 45# steel is one of common used material of axial workpiece, but its composition range is extensive, different compositions
Combination, Mechanical Fluctuation is big；And in prior art, the research of piston rod steel concentrates on surface quality, cutting ability, wear-resisting resistance to
Lossy and corrosion resistance aspect, less to stable mechanical property control aspect research.Chinese Patent Application No.
The patent documentation of 201510561588.2 discloses the production technology of a kind of vehicle piston bar wire rod, uses two pyrogene material works
Skill, relatively costly.The patent documentation of Chinese Patent Application No. 201210415179.8, discloses one and utilizes powder metallurgy process
Prepare piston lever of reducer, compare traditional steel-making, the piston rod of rolling/forging has higher density and size essence
Degree, for preventing the oil leakage phenomenon in piston rod running from having certain effect, but production efficiency is extremely low, is unfavorable for that batch is raw
Produce.The patent documentation of Chinese Patent Application No. 201210529706.8, discloses and a kind of bears the piston rod steel that load is bigger,
The percentage by weight of its each component is: C:0.37-0.45%, Si:0.17-0.37%, Mn:0.50-0.80%, S :≤0.035%, P:
≤0.035%；Cr :≤0.25%；Ni :≤0.25%；Cu :≤0.25%, other inevitable impurity: ＜ 0.1%, surplus is ferrum；
Though machinability, wear-resisting wear resistance and corrosion resistance have improvement, but Cr, Ni, Cu need to reach certain content and just can reach
To this performance, separately its specification >=40mm, use die forging mode to produce.The patent literary composition of Chinese Patent Application No. 201410173691.5
Offer, disclose a kind of boracic piston rod steel and production method thereof；The patent literary composition of Chinese Patent Application No. 201410335277.X
Offer, disclose a kind of Cutting free type low-alloy piston rod steel and production method；The two technology is all to add B element, improves
Cutting ability, but the membership that adds of B improves the incidence rate of slab surface crack, thus affect piston rod surface quality.
For the problems referred to above, a kind of piston rod steel and production method thereof disclosed in the present invention, to chemical composition and rolling
Technique is optimized design, obtains moderately good mechanical property and quenching degree..
Summary of the invention
The technical problem to be solved is: cannot meet at present conventional piston rod wire rod or can not be complete
The requirement of stability contorting piston rod mechanical performance index, the present invention provides a kind of piston rod wire rod and the producer of wire rod thereof
Method, is optimized design to chemical composition and rolling mill practice, obtains moderately good mechanical property and quenching degree.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that a kind of piston rod wire rod, described piston rod
Chemical composition and mass percent with wire rod are as follows: C:0.43-0.47%, Si:0.20-0.30%, Mn:0.65-0.85%, P≤
0.030%, S≤0.035%, Cr:0.15-0.25%, surplus is Fe and inevitable impurity.
The specification limit of piston rod wire rod of the present invention is Φ 13mm-28mm.
The mechanical property of piston rod wire rod of the present invention is: tensile strength 640-720MPa, elongation after fracture >=
20%, hardness 89-96HRB.
Another object of the present invention is to provide the production method of above-mentioned a kind of piston rod wire rod, specifically include continuous casting,
Strand heating, wire rod rolling, wire rod refrigerating work procedure, in described wire rod rolling process, enter finishing mill temperature: 900 ± 15 DEG C, enter to tell
Silk/crimping machine temperature: 850 ± 10 DEG C.
In continuous casting working procedure of the present invention, chemical composition and the mass percent of described strand are as follows: C:0.43-0.47%,
Si:0.20-0.30%, Mn:0.65-0.85%, P≤0.030%, S≤0.035%, Cr:0.15-0.25%, surplus is Fe and can not
The impurity avoided.
In continuous casting working procedure of the present invention, described casting blank cross-section size is 150 × 150mm2-160×160mm2。
In continuous casting working procedure of the present invention, described strand sequentially passes through molten iron pretreatment, converter smelting, LF stove refine, company
Foundry work sequence obtains.
In strand heating process of the present invention, strand enters in heating furnace and is initially pre-heated to 1080 ± 15 DEG C, then adds
Heat is to 1100 ± 10 DEG C of insulations, strand total time≤120min in heating furnace, oxygen content≤7% in stove.
In wire rod refrigerating work procedure of the present invention, thermal insulation cover is fully open, and cooling blower Close All, after collector
Piston rod wire rod uses aerator to be accelerated cooling on PF chain.
In wire rod refrigerating work procedure of the present invention, average roller table speed is 0.90 m/s-1.2m/s.
Use having the beneficial effects that of technique scheme: chemical composition and rolling mill practice are optimized and set by the present invention
Meter, obtains moderately good mechanical property and quenching degree.Wire rod diameter specification limit 13mm-28mm；The mechanical property of finished product wire rod
Can exist by stability contorting: tensile strength scope 640-720MPa, elongation after fracture >=20%, hardness range 89-96HRB.To Cr content
Scope accurately controls, drawing processing back piston bar surface hardening hardness 59-62HRC scope；While improve the quenching degree of steel,
Inhibit growing up of high temperature austenite, make pearlite colony be refined, and content of pearlite in alloy 60-70%, both improve steel strength
Improve again plasticity, decrease piston rod failure risk；And wire rod raw material production efficiency is high, reduce waste of material, has saved one-tenth
This, be the development trend of existing market.
Accompanying drawing explanation
Fig. 1 is the micro-organization chart of embodiment 1 piston rod wire rod:
Fig. 2 is the micro-organization chart of embodiment 2 piston rod wire rod:
Fig. 3 is the micro-organization chart of embodiment 3 piston rod wire rod:
Fig. 4 is the micro-organization chart of embodiment 4 piston rod wire rod:
Fig. 5 is the micro-organization chart of embodiment 5 piston rod wire rod.
Detailed description of the invention
Below in conjunction with the drawings and the specific embodiments, the present invention is described in further details, but the present invention is limited to absolutely not reality
Execute example.
Embodiment 1
The chemical composition of piston rod wire rod is C:0.43% by weight percentage, Si:0.20%, Mn:0.65%, P:0.030%, S:
0.035%, Cr:0.15%, surplus is Fe and inevitable impurity.
Production method is as follows:
(1) strand of optimization composition is manufactured
Smelting molten steel and be casting continuously to form strand, its chemical composition is C:0.43% by weight percentage, Si:0.20%, Mn:0.65%, P:
0.030%, S:0.035%, Cr:0.15%, surplus is Fe and inevitable impurity.
During smelting, pass sequentially through molten iron pretreatment, converter smelting, LF stove refine.Strand a size of 160mm × 160mm ×
10700mm。
(2) strand heating
Strand enters in heating furnace and is initially pre-heated to 1065 DEG C, is then heated to 1090 DEG C of insulations, total in heating furnace of strand
Time 85min, oxygen content 6% in stove.
(3) wire rod rolling
Piston rod wire rod specification is Φ 13mm.
Enter finishing mill temperature: 885 DEG C.Enter Laying head temperature: 840 DEG C.
(4) wire rod cooling
Thermal insulation cover is fully open, cooling blower Close All, and average roller table speed is 1.2 m/s, through collector back piston bar
It is used on PF chain use aerator and is accelerated cooling.
(5) performance of finished product wire rod
Tensile strength 684MPa of piston rod wire rod, elongation after fracture 28%, hardness 94HRB.Piston rod wire rod ferrite contains
Amount 32%, content of pearlite in alloy 68%.
Embodiment 2
The chemical composition of piston rod wire rod is C:0.43%, Si:0.30%, Mn:0.85%, P:0.030% by weight percentage,
S:0.035%, Cr:0.25%, surplus is Fe and inevitable impurity.
Production method is as follows:
(1) strand of optimization composition is manufactured
Smelting molten steel and be casting continuously to form strand, its chemical composition is C:0.43%, Si:0.30%, Mn:0.85% by weight percentage,
P:0.030%, S:0.035%, Cr:0.25%, surplus is Fe and inevitable impurity.
During smelting, pass sequentially through molten iron pretreatment, converter smelting, LF stove refine.Strand a size of 150mm × 150mm ×
12000mm。
(2) strand heating
Strand enters in heating furnace and is initially pre-heated to 1090 DEG C, is then heated to 1100 DEG C of insulations, total in heating furnace of strand
Time 100min, oxygen content 5% in stove.
(3) wire rod rolling
Piston rod wire rod specification is Φ 15mm.
Enter finishing mill temperature: 910 DEG C.Enter Laying head temperature: 840 DEG C.
(4) wire rod cooling
Thermal insulation cover is fully open, cooling blower Close All, and average roller table speed is 1.0 m/s, through collector back piston bar
It is used on PF chain use aerator and is accelerated cooling.
(5) performance of finished product wire rod
Tensile strength 710MPa of piston rod wire rod, elongation after fracture 25%, hardness 92HRB.Piston rod wire rod ferrite contains
Amount 35%, content of pearlite in alloy 65%.
Embodiment 3
The chemical composition of piston rod wire rod is C:0.43%, Si:0.20%, Mn:0.65%, P:0.015% by weight percentage,
S:0.006%, Cr:0.15%, surplus is Fe and inevitable impurity.
Production method is as follows:
(1) strand of optimization composition is manufactured
Smelting molten steel and be casting continuously to form strand, its chemical composition is C:0.43%, Si:0.20%, Mn:0.65% by weight percentage,
P:0.015%, S:0.006%, Cr:0.15%, surplus is Fe and inevitable impurity.
During smelting, pass sequentially through molten iron pretreatment, converter smelting, LF stove refine.Strand a size of 155mm × 155mm ×
11400mm。
(2) strand heating
Strand enters in heating furnace and is initially pre-heated to 1085 DEG C, is then heated to 1095 DEG C of insulations, total in heating furnace of strand
Time 110min, oxygen content 6% in stove.
(3) wire rod rolling
Piston rod wire rod specification is Φ 20mm.
Enter finishing mill temperature: 910 DEG C.Enter Laying head temperature: 860 DEG C.
(4) wire rod cooling
Thermal insulation cover is fully open, cooling blower Close All, and average roller table speed is 0.9 m/s, through collector back piston bar
It is used on PF chain use aerator and is accelerated cooling.
(5) performance of finished product wire rod
Tensile strength 652MPa of piston rod wire rod, elongation after fracture 22%, hardness 90HRB.Piston rod wire rod ferrite contains
Amount 37%, content of pearlite in alloy 63%.
Embodiment 4
The chemical composition of piston rod wire rod is C:0.45%, Si:0.26%, Mn:0.76%, P:0.010% by weight percentage,
S:0.005%, Cr:0.25%, surplus is Fe and inevitable impurity.
Production method is as follows:
(1) strand of optimization composition is manufactured
Smelting molten steel and be casting continuously to form strand, its chemical composition is C:0.45%, Si:0.26%, Mn:0.76% by weight percentage,
P:0.010%, S:0.005%, Cr:0.25%, surplus is Fe and inevitable impurity.
During smelting, pass sequentially through molten iron pretreatment, converter smelting, LF stove refine.Strand a size of 160mm × 160mm ×
10700mm。
(2) strand heating
Strand enters in heating furnace and is initially pre-heated to 1070 DEG C, is then heated to 1100 DEG C of insulations, total in heating furnace of strand
Time 120min, oxygen content 4% in stove.
(3) wire rod rolling
Piston rod wire rod specification is Φ 24mm.
Enter finishing mill temperature: 890 DEG C.Enter crimping machine temperature: 840 DEG C.
(4) wire rod cooling
Thermal insulation cover is fully open, cooling blower Close All, and average roller table speed is 1.0 m/s, through collector back piston bar
It is used on PF chain use aerator and is accelerated cooling.
(5) performance of finished product wire rod
Tensile strength 676MPa of piston rod wire rod, elongation after fracture 23%, hardness 93HRB.Piston rod wire rod ferrite contains
Amount 35%, content of pearlite in alloy 65%.
Embodiment 5
The chemical composition of piston rod wire rod is C:0.47%, Si:0.30%, Mn:0.85%, P:0.030% by weight percentage,
S:0.035%, Cr:0.25%, surplus is Fe and inevitable impurity.
Production method is as follows:
(1) strand of optimization composition is manufactured
Smelting molten steel and be casting continuously to form strand, its chemical composition is C:0.47%, Si:0.30%, Mn:0.85% by weight percentage,
P:0.030%, S:0.035%, Cr:0.25%, surplus is Fe and inevitable impurity.
During smelting, pass sequentially through molten iron pretreatment, converter smelting, LF stove refine.Strand a size of 155mm × 155mm ×
11400mm。
(2) strand heating
Strand enters in heating furnace and is initially pre-heated to 1095 DEG C, is then heated to 1110 DEG C of insulations, total in heating furnace of strand
Time 90min, oxygen content 4% in stove.
(3) wire rod rolling
Piston rod wire rod specification is Φ 28mm.
Enter finishing mill temperature: 915 DEG C.Enter crimping machine temperature: 860 DEG C.
(4) wire rod cooling
Thermal insulation cover is fully open, cooling blower Close All, and average roller table speed is 0.90 m/s, through collector back piston bar
It is used on PF chain use aerator and is accelerated cooling.
(5) performance of finished product wire rod
Tensile strength 698MPa of piston rod wire rod, elongation after fracture 23%, hardness 95HRB.Piston rod wire rod ferrite contains
Amount 38%, content of pearlite in alloy 62%.
Above example is only in order to illustrative not limiting technical scheme, although with reference to above-described embodiment to this
Bright be described in detail, it will be understood by those within the art that: still the present invention can be modified or etc.
With replacing, any modification or partial replacement without departing from the spirit and scope of the present invention, it all should contain the power in the present invention
In the middle of profit claimed range.
Claims (10)
1. a piston rod wire rod, it is characterised in that chemical composition and the mass percent of described piston rod wire rod are as follows:
C:0.43-0.47%, Si:0.20-0.30%, Mn:0.65-0.85%, P≤0.030%, S≤0.035%, Cr:0.15-0.25%, remaining
Amount is Fe and inevitable impurity.
A kind of piston rod wire rod the most according to claim 1, it is characterised in that the specification model of described piston rod wire rod
Enclose for Φ 13mm-28mm.
A kind of piston rod wire rod the most according to claim 1, it is characterised in that the mechanical property of described piston rod wire rod
Can be: tensile strength 640-720MPa, elongation after fracture >=20%, hardness 89-96HRB.
4. production method based on a kind of piston rod wire rod described in claim 1-3 any one, specifically includes continuous casting, casting
Base heating, wire rod rolling, wire rod refrigerating work procedure, it is characterised in that in described wire rod rolling process, enter finishing mill temperature: 900 ±
15 DEG C ,/crimping machine temperature of entering to weave silk: 850 ± 10 DEG C.
The production method of a kind of piston rod wire rod the most according to claim 4, it is characterised in that described continuous casting working procedure
In, chemical composition and the mass percent of described strand are as follows: C:0.43-0.47%, Si:0.20-0.30%, Mn:0.65-
0.85%, P≤0.030%, S≤0.035%, Cr:0.15-0.25%, surplus is Fe and inevitable impurity.
The production method of a kind of piston rod wire rod the most according to claim 4, it is characterised in that described continuous casting working procedure
In, described casting blank cross-section size is 150 × 150mm2-160×160mm2。
7. according to the production method of a kind of piston rod wire rod described in claim 4-6 any one, it is characterised in that described
In continuous casting working procedure, described strand sequentially passes through molten iron pretreatment, converter smelting, LF stove refine, continuous casting working procedure obtain.
8. according to the production method of a kind of piston rod wire rod described in claim 4-6 any one, it is characterised in that described
In strand heating process, strand enters in heating furnace and is initially pre-heated to 1080 ± 15 DEG C, is then heated to 1100 ± 10 DEG C of insulations,
Strand total time≤120min in heating furnace, oxygen content≤7% in stove.
9. according to the production method of a kind of piston rod wire rod described in claim 4-6 any one, it is characterised in that described
In wire rod refrigerating work procedure, thermal insulation cover is fully open, cooling blower Close All, through collector back piston bar wire rod on PF chain
Aerator is used to be accelerated cooling.
10. according to the production method of a kind of piston rod wire rod described in claim 4-6 any one, it is characterised in that institute
Stating in wire rod refrigerating work procedure, average roller table speed is 0.90m/s-1.2m/s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610647365.2A CN106282788A (en) | 2016-08-10 | 2016-08-10 | A kind of piston rod wire rod and production method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610647365.2A CN106282788A (en) | 2016-08-10 | 2016-08-10 | A kind of piston rod wire rod and production method thereof |
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Cited By (5)
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| CN107723613A (en) * | 2017-09-27 | 2018-02-23 | 浙江龙盛薄板有限公司 | A kind of paper cutting blade wide cut steel band and its manufacture method |
| CN108746206A (en) * | 2018-04-10 | 2018-11-06 | 马鞍山钢铁股份有限公司 | With the method for high-carbon low-alloy steel continuous cast round billets Rolling Production quartering hammer piston rod steel |
| CN109234508A (en) * | 2018-10-10 | 2019-01-18 | 邢台钢铁有限责任公司 | A kind of medium carbon steel wire rod and its production method with high intensity and high-ductility |
| CN112760571A (en) * | 2020-12-30 | 2021-05-07 | 宝鼎重工有限公司 | High-toughness piston rod forging of large marine diesel engine |
| CN114571139A (en) * | 2022-03-04 | 2022-06-03 | 新疆八一钢铁股份有限公司 | Production process of steel for H08A welding rod for mechanical shelling |
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| CN108746206A (en) * | 2018-04-10 | 2018-11-06 | 马鞍山钢铁股份有限公司 | With the method for high-carbon low-alloy steel continuous cast round billets Rolling Production quartering hammer piston rod steel |
| CN108746206B (en) * | 2018-04-10 | 2020-04-21 | 马鞍山钢铁股份有限公司 | Method for producing steel for piston rod of breaking hammer by rolling high-carbon low-alloy steel continuous casting round billet |
| CN109234508A (en) * | 2018-10-10 | 2019-01-18 | 邢台钢铁有限责任公司 | A kind of medium carbon steel wire rod and its production method with high intensity and high-ductility |
| CN109234508B (en) * | 2018-10-10 | 2020-07-24 | 邢台钢铁有限责任公司 | Medium-carbon steel wire rod with high strength and high plasticity and production method thereof |
| CN112760571A (en) * | 2020-12-30 | 2021-05-07 | 宝鼎重工有限公司 | High-toughness piston rod forging of large marine diesel engine |
| CN114571139A (en) * | 2022-03-04 | 2022-06-03 | 新疆八一钢铁股份有限公司 | Production process of steel for H08A welding rod for mechanical shelling |
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