CN108893673A - Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof - Google Patents
Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof Download PDFInfo
- Publication number
- CN108893673A CN108893673A CN201810564483.6A CN201810564483A CN108893673A CN 108893673 A CN108893673 A CN 108893673A CN 201810564483 A CN201810564483 A CN 201810564483A CN 108893673 A CN108893673 A CN 108893673A
- Authority
- CN
- China
- Prior art keywords
- pull
- bar
- evaporator
- rod
- preparation
- 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
Links
Classifications
-
- 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
- C21D1/18—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
- 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
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
- C22C33/06—Making ferrous alloys by melting using master 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
- C22C38/04—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
- C22C38/44—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
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The present invention proposes a kind of evaporator pull rod and pull-rod nut 12Cr13 bar, constituent are by weight percentage：C：0.13-0.15%；Si：0.10-0.25%；Mn：0.5-0.8%；P：≤0.015%；S：≤0.005%；Cr：11.60-12.10%；Mo:0.1-0.15%；Ni：0.6-0.8%；B：0.003-0.008%；Surplus is Fe.The preparation method of the 12Cr13 bar is：Intermediate frequency is smelted, electroslag refining, 1140 ~ 1160 DEG C of forgings, ultrasound detection, hot rolling, heat treatment, ultrasound detection, scribing line sampling, and performance test and vehicle light grind finished product.12Cr13 bar of the invention is by optimization material prescription and accurately controls, and adds Ni, Mo, B alloying element, improves harden ability, reduces б phase；Using the technique of Medium frequency+electric slag smelting remelting, reduction is mingled with and harmful phase, strict control forging and hot-rolled temperature and cooling rate, obtains good comprehensive performance by reasonable heat treatment process, lumber recovery is high.
Description
Technical field
The present invention relates to nuclear power evaporator technical field, in particular to the evaporator pull rod and pull-rod nut of nuclear power field is used
12Cr13 bar and preparation method thereof.
Pull rod and pull-rod nut are used, and the present invention passes through composition adjustment and collocation, reasonable production technology and heat treating regime
Reach and remote superalloy technical requirements, product qualification rate reach 100%.
Background technique
12Cr13, that is, national standard 1Cr13, RCCM standard x 12Cr13,12Cr13 bar material mainly uses state at present
The steam generation pull rod and pull-rod nut bar of interior independent research are steam generation alloy for connecting bars.Although in GB/T
There are specific technical requirements to 1Cr13 in 1220-2007 standard, but in actual use, it is obviously tight to the technical requirements of material
In national standard.Firstly, the 12Cr13 tensile test at room temperature intensity requirement of actual operation requirements is apparently higher than national standard, for example, room
The lower tensile strength Rm value national standard of temperature is greater than 540MPa, and actual operation requirements are greater than 760Mpa, remaining yield strength
The value national standard of Rp0.2 is greater than 345MPa, and actual operation requirements are greater than 590MPa, while the requirement of its KV impact test is also
It is apparently higher than national standard, Brinell hardness test is also to be strict in national standard, and the Brinell hardness of national standard is greater than 159 at room temperature, and real
The requirement that border uses is greater than 228；Secondly, always oppose from materialogy intensity and toughness, it is unable to same material intensity
There are also good for high tenacity again.In the production of 12Cr13 bar, tempered sorbite tissue is obtained after material requirements is quenched, because it is extremely tight
Lattice and special performance requirement keep its lumber recovery extremely low, and 0 DEG C of KV impact test test value is only in 30J or so, 0 DEG C of heat treatment adjustment
KV impact post-tensioning test is unable to satisfy again, and the unstable learies of performance are very big.Thus, it is necessary to existing 12Cr13 stick
Material can meet order by reasonable production technology and heat treating regime by the collocation of optimization ingredient and alloy element action
It is required that.
Summary of the invention
For performance requirement stringent to 12Cr13 bar in existing actual use, the object of the present invention is to provide a kind of steamings
Device pull rod and pull-rod nut 12Cr13 bar and preparation method thereof are sent out, is designed by special chemical ingredient and realizes obdurability, made
In low-temperature condition（0℃）Possess good impact flexibility, room temperature state has stable pulling and hardness performance, in the condition of high temperature
（350℃）There is high tensile strength.
To achieve the object of the present invention, the composition of a kind of evaporator pull rod and pull-rod nut 12Cr13 bar of the invention
Ingredient is by weight percentage：C：0.13-0.15%；Si：0.10-0.25%；Mn：0.5-0.8%；P：≤0.015%； S：≤
0.005%； Cr：11.60-12.10%；Mo: 0.1-0.15%；Ni：0.6-0.8%； B：0.003-0.008%；Surplus is Fe.
Preferably, the constituent of the evaporator pull rod and pull-rod nut 12Cr13 bar is by weight percentage
For：C：0.13-0.15%；Si：0.15-0.25%；Mn：0.6-0.8%；P：≤0.015%； S：≤0.005%； Cr：11.80-
12.00%；Mo: 0.1-0.15%；Ni：0.6-0.8%； B：0.003-0.008%；Surplus is Fe.
The principle and Action Specification of the design ingredient of 12Cr13 evaporator pull rod and pull-rod nut bar of the invention are such as
Under：
（1）The effect of carbon：Carbon is martensitic stain less steel important composition element, is γ phase formation element, is martensitic stain less steel phase
The basic reason of change；Carbon capping can reduce б phase, improve harden ability, promote the intensity of steel；
（2）The effect of chromium：Chromium is ferrite former, and sufficient amount chromium can make steel form single ferritic structure, is acted on carbon
Generate martensite；Chromium can make C curve move to right the main alloy element of raising harden ability, chromium or stainless passivation；Chromium removes line energy
б phase is enough reduced, ferrite is reduced and is formed；
（3）The effect of silicon：Silicon produces SiO2 after high-temperature oxydation, is distributed in the interface of oxidation film and parent metal, can hinder
Block penetrates into, and drops low-alloyed oxidation rate；When silicon and rare earth element exist simultaneously, silicon improves the effect of antioxygenic property more
Significantly；Silicon appropriate can go deoxygenation in steel-making, reduce the formation of field trash；
（4）The effect of manganese：Manganese is austenite former, and manganese, which is added, in steel-making to deoxygenate, and a small amount of manganese and sulphur formation MnS can
It reduces hot-short；
（5）The effect of nickel：Nickel expands γ phase region, reduces Ms temperature, and a small amount of nickel can reduce б phase and improve harden ability；
Nickel element is added in the present invention greatly improves the low-temperature impact toughness of material.
（6）Hydroboration：A small amount of boron element that is added can refine crystal grain, promote harden ability；
（7）The effect of molybdenum：It improves temper resistance and strengthens post-curing effect, excessively high molybdenum will form б phase, and a small amount of molybdenum improves
Harden ability and obdurability.
（8）The effect of iron：It is material matrix, changes with material component and generate phase transformation.
Another object according to the present invention, the present invention also propose above-mentioned 12Cr13 evaporator pull rod and pull-rod nut stick
The preparation method of material, the preparation method include the following steps：
S1, ferrochrome, nickel plate, molybdenum-iron, ferro-boron, electrolytic manganese, pure iron and other elements are selected according to above-mentioned element weight percent
It is put into intermediate frequency furnace smelting；
S2, intermediate frequency carry out electroslag remelting refining after smelting；
S3, forging, heating temperature is 1140~1160 DEG C when forging；
Hot rolling is carried out after S4, ultrasound detection；
S5, heat treatment, specific heat treatment process are：
Material is heated to 780~810 DEG C and keeps the temperature 1~1.5 hour；
Quenching：It heats the material to 900~1020 DEG C of heat preservations 2 hours or more, oil is cold；
Tempering：Water cooling after heating the material to 600 DEG C or more heat preservations 3-5 hours；
Material sampling after S6, heat treatment carries out mechanics properties testing, the observation of acidleach low power, check analysis and nonmetal inclusion
Quality testing is tested；
Ultrasonic examination, liquid penetration test, dimensional gaughing etc. are carried out after S7, machining, grinding obtains 12Cr13 bar product.
Preferably, in the step S3, the forging temperature is 1150~1160 DEG C.
It further preferably, is to heat the material to 800 DEG C to keep the temperature 1.2~1.5 hours in the step S5.
It further preferably, is that heat the material to 980~1020 DEG C of heat preservations 3~4 small in the quenching technical of the step S5
When after oil it is cold.
Further preferably, in the tempering process of the step S5, be heat the material to 670~690 DEG C heat preservation 3.5~
Water cooling after 4.5 hours.
12Cr13 evaporator pull rod and pull-rod nut bar of the invention and preparation method thereof optimize material prescription, choosing
More accurate composition range is selected and controlled, Ni, Mo, B alloying element are added, harden ability is improved, reduces б phase, the element of addition
Select Strengthening and Toughening element；The technique that Medium frequency+electric slag smelting remelting is used in preparation method, reduction is mingled with and harmful phase, and strict control
Forging and hot-rolled temperature and cooling rate, obtain good comprehensive performance by reasonable heat treatment process.
Detailed description of the invention
Through the following detailed description taken in conjunction with the accompanying drawings, present invention objects, features and advantages above-mentioned and other will become
Obviously.Wherein：
Fig. 1 show the preparation process flow schematic diagram of evaporator pull rod and pull-rod nut 12Cr13 bar of the invention.
Specific embodiment
In conjunction with the drawings and the specific embodiments, the element of 12Cr13 evaporator pull rod of the invention and pull-rod nut bar at
Point and preparation method and advantage details are as follows.
Embodiment 1：
Raw material are chosen, 0.13% C, 0.15% Si are contained by weight percentage in material；0.6% Mn；11.8% Cr,
0.12% Mo, 0.6% Ni, 0.005% B, surplus Fe, and control P content≤0.015%；S content≤0.005%.
Material investment intermediate frequency is smelted, electroslag refining is heated to 1140 DEG C and is forged after refining, hot after ultrasound detection
It rolls, is then heat-treated, heating after 980 DEG C of quenching and preserving heats, 3 hours oil is cold after heating the material to 800 DEG C of heat preservations 1.5 hours
4 hours are kept the temperature to 680 DEG C of tempering, ultrasound detection is carried out after water cooling, scribing line sampling performance test, vehicle light, which is ground, is made 12Cr13 stick
Material finished product.
Embodiment 2：
Raw material are chosen, 0.15% C, 0.2% Si are contained by weight percentage in material；0.8% Mn；12% Cr, 0.15%
Mo, 0.8% Ni, 0.005% B, surplus Fe, and control P content≤0.015%；S content≤0.005%.
Material investment intermediate frequency is smelted, electroslag refining is heated to 1160 DEG C and is forged after refining, hot after ultrasound detection
It rolls, is then heat-treated, heating after 990 DEG C of quenching and preserving heats, 2.5 hours oil is cold after heating the material to 805 DEG C of heat preservations 1 hour
4.5 hours are kept the temperature to 690 DEG C of tempering, ultrasound detection is carried out after water cooling, scribing line sampling performance test, vehicle light, which is ground, is made 12Cr13
Rod product.
Embodiment 3：
Raw material are chosen, 0.14% C, 0.23% Si are contained by weight percentage in material；0.7% Mn；12.1% Cr,
0.13% Mo, 0.7% Ni, 0.008% B, surplus Fe, and control P content≤0.015%；S content≤0.005%.
Material investment intermediate frequency is smelted, electroslag refining is heated to 1150 DEG C and is forged after refining, hot after ultrasound detection
It rolls, is then heat-treated, is heated to after 1000 DEG C of quenching and preserving heats, 2 hours oil is cold after heating the material to 805 DEG C of heat preservations 1 hour
700 DEG C of tempering keep the temperature 3.5 hours, ultrasound detection are carried out after water cooling, scribing line sampling performance test, vehicle light, which is ground, is made 12Cr13 stick
Material finished product.
12Cr13 bar result of sampling inspection such as the following table 1 made from each embodiment：
Table 1：12Cr13 rod mechanical performance test result
It can be seen that 12Cr13 bar of the invention by designing reasonable ingredient collocation, Yi Jihe from above-mentioned testing result
The production technology and heat treating regime of reason（990 ~ 1000+680 ~ 700 DEG C of quenching tempering）It can achieve and remote superalloy technology is wanted
It asks, product qualification rate reaches 100%.
Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof of the invention, passes through special chemical ingredient
Obdurability is realized in design, is allowed in low-temperature condition（0℃）Possess good impact flexibility, room temperature state has stable pulling and hardness
Performance, in the condition of high temperature（350℃）There is high tensile strength；The lumber recovery of material is high, suitable for mass production.
The present invention is not limited to the described embodiments, and those skilled in the art is not departing from spirit of the invention i.e. public affairs
Open in range, still may make some modifications or changes, thus the range that is limited with claims of the scope of the present invention as
It is quasi-.
Claims (7)
1. a kind of evaporator pull rod and pull-rod nut 12Cr13 bar, which is characterized in that the composition of the 12Cr13 bar
Ingredient is by weight percentage：C：0.13-0.15%；Si：0.10-0.25%；Mn：0.5-0.8%；P：≤0.015%； S：≤
0.005%； Cr：11.60-12.10%；Mo: 0.1-0.15%；Ni：0.6-0.8%； B：0.003-0.008%；Surplus is Fe.
2. evaporator pull rod as described in claim 1 and pull-rod nut 12Cr13 bar, which is characterized in that described
The constituent of 12Cr13 bar is by weight percentage：C：0.13-0.15%；Si：0.15-0.25%；Mn：0.6-0.8%；P：
≤0.015%； S：≤0.005%； Cr：11.80-12.00%；Mo: 0.1-0.15%；Ni：0.6-0.8%； B：0.003-
0.008%；Surplus is Fe.
3. a kind of preparation method for preparing evaporator pull rod and pull-rod nut 12Cr13 bar as claimed in claim 1 or 2,
It is characterized in that, the preparation method includes the following steps：
S1, ferrochrome, nickel plate, molybdenum-iron, ferro-boron, electrolytic manganese, pure iron and other elements are selected according to above-mentioned element weight percent
It is put into intermediate frequency furnace smelting；
S2, intermediate frequency carry out electroslag remelting refining after smelting；
S3, forging, heating temperature is 1140~1160 DEG C when forging；
Hot rolling is carried out after S4, ultrasound detection；
S5, heat treatment, specific heat treatment process are：
Material is heated to 780~810 DEG C and keeps the temperature 1~1.5 hour；
Quenching：It heats the material to 900~1020 DEG C of heat preservations 2 hours or more, oil is cold；
Tempering：Water cooling after heating the material to 600 DEG C or more heat preservations 3-5 hours；
Material sampling after S6, heat treatment carries out mechanics properties testing, the observation of acidleach low power, check analysis and nonmetal inclusion
Quality testing is tested；
Ultrasonic examination, liquid penetration test, dimensional gaughing etc. are carried out after S7, machining, grinding obtains 12Cr13 bar product.
4. the preparation method of evaporator pull rod as claimed in claim 3 and pull-rod nut 12Cr13 bar, which is characterized in that
In the step S3, the forging temperature is 1150~1160 DEG C.
5. the preparation method of evaporator pull rod as claimed in claim 3 and pull-rod nut 12Cr13 bar, which is characterized in that
It is to heat the material to 800 DEG C to keep the temperature 1.2~1.5 hours in the step S5.
6. the preparation method of evaporator pull rod as claimed in claim 3 and pull-rod nut 12Cr13 bar, which is characterized in that
It is that oil is cold after heating the material to 980~1020 DEG C of heat preservations 3~4 hours in the quenching technical of the step S5.
7. the preparation method of evaporator pull rod as claimed in claim 3 and pull-rod nut 12Cr13 bar, which is characterized in that
It is to heat the material to water cooling after 670~690 DEG C of heat preservations 3.5~4.5 hours in the tempering process of the step S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810564483.6A CN108893673A (en) | 2018-06-04 | 2018-06-04 | Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810564483.6A CN108893673A (en) | 2018-06-04 | 2018-06-04 | Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108893673A true CN108893673A (en) | 2018-11-27 |
Family
ID=64344283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810564483.6A Pending CN108893673A (en) | 2018-06-04 | 2018-06-04 | Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108893673A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111004981A (en) * | 2019-12-31 | 2020-04-14 | 江苏新华合金有限公司 | XL3303-33 bar and production process thereof |
| CN113564312A (en) * | 2021-06-25 | 2021-10-29 | 江苏锦瑞金属制品有限公司 | Nut production method |
| CN113884354A (en) * | 2021-09-17 | 2022-01-04 | 江苏裕隆锻造有限公司 | Manufacturing and testing method of 1Cr13 evaluation test bar |
| CN116136011A (en) * | 2021-11-17 | 2023-05-19 | 江苏新华合金有限公司 | 12Cr13 bar for evaporator pull rod and pull rod nut and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812625A (en) * | 2010-04-21 | 2010-08-25 | 中国科学院金属研究所 | Smelting process of 1Cr13 stainless steel |
| CN105200346A (en) * | 2015-09-22 | 2015-12-30 | 江苏新核合金科技有限公司 | 12Cr13 bar used for evaporator pull rods and pull rod nuts |
| EP2857126B1 (en) * | 2013-10-02 | 2016-05-25 | Uddeholms AB | Corrosion and wear resistant cold work tool steel |
-
2018
- 2018-06-04 CN CN201810564483.6A patent/CN108893673A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101812625A (en) * | 2010-04-21 | 2010-08-25 | 中国科学院金属研究所 | Smelting process of 1Cr13 stainless steel |
| EP2857126B1 (en) * | 2013-10-02 | 2016-05-25 | Uddeholms AB | Corrosion and wear resistant cold work tool steel |
| CN105200346A (en) * | 2015-09-22 | 2015-12-30 | 江苏新核合金科技有限公司 | 12Cr13 bar used for evaporator pull rods and pull rod nuts |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111004981A (en) * | 2019-12-31 | 2020-04-14 | 江苏新华合金有限公司 | XL3303-33 bar and production process thereof |
| CN113564312A (en) * | 2021-06-25 | 2021-10-29 | 江苏锦瑞金属制品有限公司 | Nut production method |
| CN113884354A (en) * | 2021-09-17 | 2022-01-04 | 江苏裕隆锻造有限公司 | Manufacturing and testing method of 1Cr13 evaluation test bar |
| CN116136011A (en) * | 2021-11-17 | 2023-05-19 | 江苏新华合金有限公司 | 12Cr13 bar for evaporator pull rod and pull rod nut and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101603119B (en) | Method for manufacturing steel plate with high strength and high toughness by using hot-rolling coiled plate | |
| CN105506494B (en) | A kind of yield strength 800MPa grade high ductilities hot-rolling high-strength steel and its manufacture method | |
| CN103820729B (en) | Titanium reinforced high-cobalt martensitic aged anti-corrosion ultrahigh-strength steel and preparation method | |
| CN108893673A (en) | Evaporator pull rod and pull-rod nut 12Cr13 bar and preparation method thereof | |
| CN104513936B (en) | A kind of yield strength 1100MPa grades of quenching and tempering, highs and its production method | |
| CN104046915A (en) | Large-section high-performance hot work die steel for die casting and preparation technology thereof | |
| CN106636908B (en) | A kind of nanometer of bainite spring steel and preparation method thereof | |
| CN103695802A (en) | High-molybdenum high-strength secondary hardening ultra-high-strength steel and preparation method thereof | |
| CN103436803A (en) | Processing method for pump head body of five-cylinder plunger pump | |
| CN103014554A (en) | Low-yield-ratio high-tenacity steel plate and manufacture method thereof | |
| CN103741068A (en) | Special process for freely forging EH36 optimized material steel ingot into plate-shaped bearing seat forged piece | |
| CN104532156A (en) | Quenched and tempered high strength steel with 1300 MPa grade of yield strength and production method thereof | |
| CN109487061B (en) | Heat treatment method of martensite precipitation hardening stainless steel 06Cr15Ni5Cu2Ti | |
| CN108368591A (en) | Steel plate of pressure vessel and its manufacturing method with excellent post weld heat treatment patience | |
| CN107475487B (en) | A kind of production method of low-carbon and low-alloy high intensity high/low temperature toughness steel-casting | |
| CN114351058B (en) | Alloy steel with yield strength of 2000MPa and preparation method thereof | |
| CN105200346A (en) | 12Cr13 bar used for evaporator pull rods and pull rod nuts | |
| CN114317918B (en) | Beehive composite phase-change heavy rail steel with high strength and toughness tissue quantitatively controlled and preparation method thereof | |
| CN103643012B (en) | A kind of strengthen connotation test method of steel | |
| CN104818432B (en) | A kind of alloy material for Steam Turbine rotor and preparation method thereof | |
| CN101812634B (en) | Low-carbon low-welding crack-sensitive high-strength steel and steel plate and manufacture method thereof | |
| EP0031800B1 (en) | Austenitic, precipitation hardenable stainless steel | |
| CN104109811B (en) | Mn-Cr-V system superhigh intensity nonmagnetic steel and production method thereof | |
| CN107245563A (en) | It is a kind of to improve indissoluble delta ferrite solid solution speed in martensite type refractory steel ingot casting while the technology of fining austenite grains | |
| CN103451553A (en) | Reinforced bar used in ultra-low temperature environments 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 | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 225722 Luo West Village, Zhang Guo Town, Xinghua City, Taizhou, Jiangsu Applicant after: Jiangsu Xinhua Alloy Co., Ltd Address before: 225722 Luo West Village, Zhang Guo Town, Xinghua City, Taizhou, Jiangsu Applicant before: Jiangsu Xinhua Alloy Electric Apparatus Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181127 |