CN110218956A - One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method - Google Patents

One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method Download PDF

Info

Publication number
CN110218956A
CN110218956A CN201910435825.9A CN201910435825A CN110218956A CN 110218956 A CN110218956 A CN 110218956A CN 201910435825 A CN201910435825 A CN 201910435825A CN 110218956 A CN110218956 A CN 110218956A
Authority
CN
China
Prior art keywords
hardened
low
tempered steel
steel
directly cut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910435825.9A
Other languages
Chinese (zh)
Inventor
张刘瑜
屈小波
包耀宗
王军
程勇
刘绍康
李刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiangsu Yonggang Group Co Ltd
Original Assignee
Jiangsu Yonggang Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jiangsu Yonggang Group Co Ltd filed Critical Jiangsu Yonggang Group Co Ltd
Priority to CN201910435825.9A priority Critical patent/CN110218956A/en
Publication of CN110218956A publication Critical patent/CN110218956A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
    • 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
    • C21C7/10—Handling in a vacuum
    • 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
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • 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
    • C22C38/02—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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
    • 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
    • C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
    • 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
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • 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
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Heat Treatment Of Steel (AREA)

Abstract

The present invention provides one kind and directly cuts with low-carbon bainite non-hardened and tempered steel and its production method.Of the invention directly cuts with low-carbon bainite non-hardened and tempered steel, it is characterized by: including: C:0.10~0.35%, Si:0.30~1.00%, Mn:1.50~3.0%, P≤0.012%, S≤0.006%, Cr:0.35~0.95%, V:0.04~0.12%, Nb:0.010~0.030%, Mo:0.05~0.20%, Al:0.020~0.040%, Ti:0.015~0.025%, Ni:0.10~0.20%, O≤15ppm, N:110~180ppm, surplus Fe by mass percentage.The present invention overcomes the impact-levels of existing non-hardened and tempered steel bar to be difficult to the problem of reaching 50J, can satisfy the requirement of injection molding machine pull rod steel (φ 175mm specification) impact strength.

Description

One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method
Technical field:
The present invention relates to one kind to directly cut with low-carbon bainite non-hardened and tempered steel and its production method, belongs to steel alloy technology Field.
Background technique:
Non-hardened and tempered steel is a kind of rolling (or forging) to be combined as a whole to replace quenched process with heat treatment process Steel grade, due to having the characteristics that energy conservation, simplifying production process and reducing cost, non-hardened and tempered steel automobile, tractor, standard component, The popularization and application of the industries such as petroleum have resulted in very significant economic benefit and social benefit.Non-hardened and tempered steel common at present has Three classes, i.e. ferrite-pearlite type non-hardened and tempered steel, Microalloyed Bainitic Engineering Steel, martensite type non-hardened and tempered steel.High-strength and high ductility bayesian Figure non-hardened and tempered steel (Mn-Cr-V system) can be used to replace traditional chromium and the quenched steel making automobile front axle of Cr-Mo type etc. to intensity With the higher part of toughness reguirements.
Tensile strength level >=850MPa of current developed Bainitic Steels bar is unable to satisfy injection molding machine drawing Impact AKU2 (room temperature) >=50J requirement of bar steel (φ 175mm specification).Thus non-tune steel is limited in high performance requirements The application in bar rings domain.
Summary of the invention:
The purpose of the present invention is provide one kind in view of the above problems to directly cut with low-carbon bainite non-hardened and tempered steel And its production method, the impact flexibility level for overcoming existing non-hardened and tempered steel bar are difficult to the problem of reaching 50J, can satisfy (the φ 175mm specification) impact strength >=50J requirement of injection molding machine pull rod.
Above-mentioned purpose is achieved through the following technical solutions:
One kind is directly cut with low-carbon bainite non-hardened and tempered steel, by mass percentage include: C:0.10~0.20%, Si:0.84~0.90%, Mn:2.0~2.5%, P≤0.012%, S≤0.006%, Cr:0.0.67~0.0.72%, V: 0.08~0.12%, Nb:0.020~0.023%, Mo:0.11~0.17%, Al:0.030~0.034%, Ti:0.015~ 0.022%, Ni:0.10~0.20%, O≤15ppm, N:110~180ppm, surplus Fe.
The above-mentioned production method directly cut with low-carbon bainite non-hardened and tempered steel, this method comprises the following steps: electric furnace refining Steel → LF refining → VD vacuum processing → molding → heating → rolling → air-cooled → sampling → finishing → flaw detection → storage.
The production method directly cut with low-carbon bainite non-hardened and tempered steel, the specific work in the electric furnace steel making stage Skill requirement are as follows:
Technique requirement:
1. terminal C >=0.03%, aim carbon 0.04~0.09%；
2. target P≤0.007%；
3. target T >=1620 DEG C；
4. lime 600kg promotees net agent 200kg, 120~140kg/ of aluminium furnace of tapping.
The technique of the production method directly cut with low-carbon bainite non-hardened and tempered steel, the LF refining stage is wanted It asks: white slag time >=20min, the duration of heat >=45min；Supplementary product consumption: silicon carbide 140kg, aluminum steel 280m, carbon line 13kg are raw Lime 141kg.
The production method directly cut with low-carbon bainite non-hardened and tempered steel, the VD are vacuum-treated stage process and want It asks: high vacuum retention time >=15min, soft blow time >=30min；2. line feeding sequence: nitrogenized manganese iron wire-ferrotianium line-aluminum steel.
The utility model has the advantages that
Using method of the invention, obtain directly cut the tensile strength with low-carbon bainite non-hardened and tempered steel >= 1100MPa, Brinell hardness are 320~360HBW, impact AKU2 (room temperature) >=50J, yield strength >=800MPa, elongation after fracture >=12%, the contraction percentage of area >=50%, grain size >=7.0 grade realize non-hardened and tempered steel high intensity high impact property, impact mean value Reach 50J or more, can satisfy the requirement of high-strength high impact property of injection molding machine pull rod.
Detailed description of the invention:
Fig. 1 is non-hardened and tempered steel bar provided in an embodiment of the present invention away from 500 times of metallographs at outer surface 1/3；
Fig. 2 is non-hardened and tempered steel bar provided in an embodiment of the present invention away from 100 times of metallographs at outer surface 1/3.
Finished product bar does metallographic observation, and Fig. 1 matrix is granular bainite microstructure, and Fig. 2 can be seen that in microphoto and deposit It is organized on the island Ma Ao.
Specific embodiment:
Embodiment 1:
One kind is directly cut with low-carbon bainite non-hardened and tempered steel, includes: C:0.14%, Si by mass percentage: 0.90%, Mn:2.51%, P:0.0053%, S:0.002%, Cr:0.70%, V:0.089%, Nb:0.020%, Mo: 0.174%, Al:0.0275%, Ti:0.017%, Ni:0.191%, O:7.8ppm, N:144ppm, surplus Fe.
The above-mentioned production method directly cut with low-carbon bainite non-hardened and tempered steel, this method comprises the following steps: electric furnace refining Steel → LF refining → VD vacuum processing → molding → heating → rolling → air-cooled → sampling → finishing → flaw detection → storage.
Eaf process:
Technique requirement:
1. terminal C >=0.03%, aim carbon 0.04~0.09%；
2. target P≤0.007%；
3. target T >=1620 DEG C；
4. lime 600kg promotees net agent 200kg, 120~140kg/ of aluminium furnace of tapping.
Smelting number Tap Tapping temperature Tapping carbon Tapping phosphorus Tapping sulphur Promote net agent Lime Big aluminium block
18E104505 100.18t 1614℃ 0.07% 0.003% 0.011% 303kg 504kg 135kg
Refining procedure:
(1) technique requirement:
White slag time >=20min, the duration of heat >=45min.
(2) supplementary product consumption:
Smelting number Silicon carbide Aluminum steel Carbon line Quick lime Promote net agent
18E104505 140kg 280m 13kg 141kg 0
Alloy feeds aluminum steel 280m after melting, because of the partially dilute addition 141kg lime of slag after sampling.It is taken in L1-1, L1-2, L1-3 80kg, 40kg, 20kg silicon carbide are separately added into before sample.The outbound 40m carbon line of feeding in first 30 minutes.
(3) smelting process:
Smelting number The white slag time The duration of heat Conduction time Argon gas consumption Electricity consumption Bull ladle temperature
18E104505 50min 144min 59min 69277.9NL 12880kwh 1670℃
(4) chemical component:
Sample number C Si Mn P S Cr Ni Mo V Nb Ti Al Al_S
L1-4 0.12 0.83 2.45 0.005 0.002 0.69 0.18 0.17 0.086 0.021 0.004 0.032 0.0308
L1-3 0.11 0.79 2.39 0.005 0.002 0.68 0.18 0.16 0.083 0.021 0.004 0.035 0.0339
L1-2 0.11 0.76 2.34 0.005 0.001 0.67 0.17 0.14 0.079 0.022 0.004 0.043 0.0418
L1-1 0.09 0.73 2.30 0.004 0.001 0.64 0.16 0.11 0.059 0.022 0.003 0.065 0.062
(5) process aluminium controls
Smelting number L1-1 L1-2 L1-3 L1-4 V1-1 V1-2 V1-3
18E104505 0.0645% 0.0434% 0.0348% 0.0322% 0.0171% 0.0329% 0.0292%
VD process:
(1) technique requirement:
1. high vacuum retention time >=15min, soft blow time >=30min；
2. line feeding sequence: nitrogenized manganese iron wire-ferrotianium line-aluminum steel；
(2) smelting process:
Technique requirement / ≥10min ≥30min
Smelting number Vacuum time High vacuum The soft blow time Broken air temperature degree Vacuum temperature drop Bull ladle temperature Soft blow temperature drop
18E104505 35min 26min 56min 1619℃ 1.63℃/min 1565℃ 0.41℃/min
Vacuum, high vacuum, soft blow time meet technique requirement, but broken empty temperature drift (online 54 DEG C of high bull ladle temperature), Soft blow overlong time.
Smelting number Nitrogenized manganese iron wire Ferrotianium line Aluminum steel Argon gas consumption Determine hydrogen [N] [Ti]
18E104505 380.4m 101m 58m 24427.2NL 0.64ppm 114ppm 0.02%
Line feeding, determine hydrogen, component content be all satisfied technique requirement.
(3) slag specimen:
Smelting number Test piece number (Test pc No.) CaO/% SiO2/% P/% Σ FeO/% TFe/% S/% Al2O3/% MnO/% MgO/% TiO2/% R
18E104505 ZV-1 46.41 9.78 0.001 0.442 0.309 0.33 30.03 0.319 7.76 0.21 4.75
18E104505 ZL-4 51.15 7.85 0.002 0.525 0.367 0.42 30.84 0.189 5.53 0.14 6.51
Five, molding operations
(1) process control
Product material object mechanical property
1, tensile property
Note: sample position 1/3
2, impact property
Note: sample position 1/3
As it can be seen that the low-carbon bainite steel mechanical property of the embodiment of the present invention is higher than common non-hardened and tempered steel, especially impact Can, advantage is more apparent.Also superior to common Bainitic Steels.
Embodiment 2:
It is directly cut described in the present embodiment with low-carbon bainite non-hardened and tempered steel, includes: C by mass percentage: 0.20%, Si:0.89%, Mn:2.45%, P:0.0051%, S:0.003%, Cr:0.71%, V:0.090%, Nb: 0.020%, Mo:0.171%, Al:0.0271%, Ti:0.015%, Ni:0.190%, O:8.1ppm, N:140ppm, surplus are Fe.Smelting process is the same as embodiment 1.
Embodiment 3:
It is directly cut described in the present embodiment with low-carbon bainite non-hardened and tempered steel, includes: C by mass percentage: 0.10%, Si:0.90%, Mn:2.40%, P:0.0051%, S:0.002%, Cr:0.69%, V:0.085%, Nb: 0.021%, Mo:0.167%, Al:0.0285%, Ti:0.018%, Ni:0.191%, O:7.6ppm, N:139ppm, surplus are Fe.Smelting process is the same as embodiment 1.
Embodiment 4:
It is directly cut described in the present embodiment with low-carbon bainite non-hardened and tempered steel, includes: C by mass percentage: 0.15%, Si:0.90%, Mn:2.51%, P:0.0053%, S:0.002%, Cr:0.70%, V:0.11%, Nb: 0.020%, Mo:0.174%, Al:0.0275%, Ti:0.017%, Ni:0.191%, O:7.8ppm, N:144ppm, surplus are Fe.Smelting process is the same as embodiment 1.
Embodiment 5:
It is directly cut described in the present embodiment with low-carbon bainite non-hardened and tempered steel, includes: C by mass percentage: 0.15%, Si:0.90%, Mn:2.01%, P:0.0053%, S:0.002%, Cr:0.70%, V:0.090%, Nb: 0.021%, Mo:0.175%, Al:0.0276%, Ti:0.022%, Ni:0.190%, O:7.9ppm, N:141ppm, surplus are Fe.Smelting process is the same as embodiment 1.
The low-carbon bainite steel of embodiment 2 to 5 see the table below with common non-hardened and tempered steel F49MnVS mechanical property comparing result:
As it can be seen that the low-carbon bainite steel mechanical property of four kinds of embodiments of the invention is better than common non-hardened and tempered steel, it is especially low Warm impact property, advantage are more apparent.Also superior to common Bainitic Steels.

Claims (5)

1. one kind is directly cut with low-carbon bainite non-hardened and tempered steel, it is characterised in that: by mass percentage include: C:0.10~ 0.18%, Si:0.30~1.00%, Mn:1.50~3.0%, P≤0.012%, S≤0.006%, Cr:0.35~0.95%, V:0.04~0.12%, Nb:0.010~0.030%, Mo:0.05~0.20%, Al:0.020~0.040%, Ti:0.015~ 0.025%, Ni:0.10~0.20%, O≤15ppm, N:135~145ppm, surplus Fe.
2. a kind of production method directly cut with low-carbon bainite non-hardened and tempered steel, it is characterised in that: this method includes following step Rapid: electric furnace steel making → LF refining → VD vacuum processing → molding → heating → rolling → air-cooled → sampling → finishing → is detected a flaw → is entered Library.
3. the production method according to claim 2 directly cut with low-carbon bainite non-hardened and tempered steel, it is characterised in that: institute State the concrete technology requirement in electric furnace steel making stage are as follows:
Technique requirement:
1. terminal C >=0.03%, aim carbon 0.04~0.09%；
2. target P≤0.007%；
3. target T >=1620 DEG C；
4. lime 600kg promotees net agent 200kg, 120~140kg/ of aluminium furnace of tapping.
4. the production method according to claim 2 directly cut with low-carbon bainite non-hardened and tempered steel, it is characterised in that: institute State the technique requirement in LF refining stage: white slag time >=20min, the duration of heat >=45min；Supplementary product consumption: silicon carbide 140kg, Aluminum steel 280m, carbon line 13kg, quick lime 141kg.
5. the production method according to claim 2 directly cut with low-carbon bainite non-hardened and tempered steel, it is characterised in that: institute It states VD and is vacuum-treated stage process requirement: high vacuum retention time >=15min, soft blow time >=30min；2. line feeding sequence: nitrogen Change manganese iron wire-ferrotianium line-aluminum steel.
CN201910435825.9A 2019-05-23 2019-05-23 One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method Pending CN110218956A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910435825.9A CN110218956A (en) 2019-05-23 2019-05-23 One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910435825.9A CN110218956A (en) 2019-05-23 2019-05-23 One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method

Publications (1)

Publication Number Publication Date
CN110218956A true CN110218956A (en) 2019-09-10

Family

ID=67817877

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910435825.9A Pending CN110218956A (en) 2019-05-23 2019-05-23 One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method

Country Status (1)

Country Link
CN (1) CN110218956A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111118403A (en) * 2020-03-06 2020-05-08 马鞍山钢铁股份有限公司 Ti microalloyed high-strength high-toughness bainite non-quenched and tempered steel and forging and cooling control process and production process thereof
CN115074634A (en) * 2022-07-08 2022-09-20 北京高创智信冶金科技有限公司 High-strength non-quenched and tempered steel front shaft for heavy-duty automobile and production process thereof
CN115896614A (en) * 2022-10-31 2023-04-04 中国第一汽车股份有限公司 Niobium-containing bainite non-quenched and tempered steel material, steering knuckle and preparation method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1532300A (en) * 2003-03-26 2004-09-29 ס�ѽ�����ҵ��ʽ���� Non quenched and tempered seamless steel pipe
CN101254527A (en) * 2008-02-01 2008-09-03 湖南华菱涟源钢铁有限公司 Method for producing low carbon bainite high-strength steel based on sheet bar continuous casting and rolling process flow
CN102051522A (en) * 2010-12-21 2011-05-11 南阳汉冶特钢有限公司 Steel plate made of bainite structure high-strength toughness structural steel Q550D(E) and production method thereof
CN102899589A (en) * 2012-09-25 2013-01-30 长城汽车股份有限公司 High-strength non-tempered bainite steel and preparation method thereof
CN103436814A (en) * 2013-08-19 2013-12-11 南京钢铁股份有限公司 Ultra-low-temperate ribbed steel bar for liquefied natural gas tank, and preparation method thereof
CN103589970A (en) * 2013-10-24 2014-02-19 南京钢铁股份有限公司 Bar material for non-quenched and tempered shaft part and manufacturing process of bar material

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1532300A (en) * 2003-03-26 2004-09-29 ס�ѽ�����ҵ��ʽ���� Non quenched and tempered seamless steel pipe
CN101254527A (en) * 2008-02-01 2008-09-03 湖南华菱涟源钢铁有限公司 Method for producing low carbon bainite high-strength steel based on sheet bar continuous casting and rolling process flow
CN102051522A (en) * 2010-12-21 2011-05-11 南阳汉冶特钢有限公司 Steel plate made of bainite structure high-strength toughness structural steel Q550D(E) and production method thereof
CN102899589A (en) * 2012-09-25 2013-01-30 长城汽车股份有限公司 High-strength non-tempered bainite steel and preparation method thereof
CN103436814A (en) * 2013-08-19 2013-12-11 南京钢铁股份有限公司 Ultra-low-temperate ribbed steel bar for liquefied natural gas tank, and preparation method thereof
CN103589970A (en) * 2013-10-24 2014-02-19 南京钢铁股份有限公司 Bar material for non-quenched and tempered shaft part and manufacturing process of bar material

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111118403A (en) * 2020-03-06 2020-05-08 马鞍山钢铁股份有限公司 Ti microalloyed high-strength high-toughness bainite non-quenched and tempered steel and forging and cooling control process and production process thereof
CN111118403B (en) * 2020-03-06 2020-11-03 马鞍山钢铁股份有限公司 Ti microalloyed high-strength high-toughness bainite non-quenched and tempered steel and forging and cooling control process and production process thereof
CN115074634A (en) * 2022-07-08 2022-09-20 北京高创智信冶金科技有限公司 High-strength non-quenched and tempered steel front shaft for heavy-duty automobile and production process thereof
CN115074634B (en) * 2022-07-08 2023-01-06 北京高创智信冶金科技有限公司 High-strength non-quenched and tempered steel front shaft for heavy-duty automobile and production process thereof
CN115896614A (en) * 2022-10-31 2023-04-04 中国第一汽车股份有限公司 Niobium-containing bainite non-quenched and tempered steel material, steering knuckle and preparation method

Similar Documents

Publication Publication Date Title
CN107177797B (en) The oil gas field anti-corrosion drilling tool steel of 130KSI, 135KSI rank and its manufacturing method
CN101671792B (en) Spring steel and preparation method thereof
CN110218956A (en) One kind is directly cut with low-carbon bainite non-hardened and tempered steel and its production method
CN102899575B (en) Non-quenched and tempered steel used for welding and electroplating hydraulic rod and production method thereof
CN1888116B (en) High hardness and high wear resistance no-magnetism bearing steel and its preparation method
CN101613835A (en) A kind of alloy hot rolled steel plate and make the method for gas cylinder with it
CN106939391A (en) A kind of Ca microalloyings easy-cutting high strength fractured connecting rod steel and manufacture method
CN103614640B (en) A kind of non-coating hot press-formed steel of resistance to high temperature oxidation
CN101603119A (en) Make the method for high-intensity high-tenacity steel plate with hot-rolled coil
Gramlich et al. Development of air-hardening martensitic forging steels
CN110499474A (en) High temperature resistant 400HB wear-resisting steel plate and its production method
CN103131962A (en) High-tenacity low-alloy high-strength steel and quenched-tempered heat treatment method thereof
CN106086639B (en) A kind of strong steel for engineering machinery Q960D of superelevation and its production method
US20240052470A1 (en) Non-quenched and Tempered Round Steel with High Strength, High Toughness and Easy Cutting and Manufacturing Method Therefor
CN108411192A (en) A kind of high-hardenability engineering machinery thrust wheel steel and preparation method
CN105925904B (en) The excellent steel plate containing Mo of a kind of high-temp and high-strength, low-temperature impact toughness and its manufacture method
CN107937807A (en) 770MPa grades of low-welding crack-sensitive pressure vessel steels and its manufacture method
CN1330789C (en) 600MPa grade low temperature high toughness weather corrosion resistant steel and its production method
CN106435360A (en) High-strength, high-toughness, corrosion-resistant and weather-resistant steel plate and manufacturing method thereof
CN106947911A (en) A kind of high-intensity high-tenacity high-wearing feature austempored ductile iron and its preparation method and application
CN108677084A (en) A kind of low production method for being mingled with clean steel
CN107974643A (en) - 70 DEG C of normalized high-strength low yield strength ratio pressure vessel steels and its manufacture method
CN101849028A (en) High tensile steel for deep drawing and manufacturing method thereof
CN112048668B (en) High-hardness steel for shield cutter and manufacturing method thereof
CN109295391A (en) A kind of high-strength tenacity non-hardened and tempered steel and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20190910