CN108754081A - A kind of heat-treatment technology method of two phase stainless steel - Google Patents
A kind of heat-treatment technology method of two phase stainless steel Download PDFInfo
- Publication number
- CN108754081A CN108754081A CN201810626234.5A CN201810626234A CN108754081A CN 108754081 A CN108754081 A CN 108754081A CN 201810626234 A CN201810626234 A CN 201810626234A CN 108754081 A CN108754081 A CN 108754081A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- phase stainless
- heat
- treatment technology
- technology method
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
- C21D1/773—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material under reduced pressure or 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
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/06—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
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- 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
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- 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
- C21D2211/001—Austenite
-
- 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
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)
- Heat Treatment Of Articles (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The present invention provides a kind of heat-treatment technology methods of two phase stainless steel, and the mechanical performance of product can be promoted by using this method.Its technical solution is such：A kind of heat-treatment technology method of two phase stainless steel, which is characterized in that it includes following steps：Step 1：Two phase stainless steel is placed in high-pressure gas-quenching vacuum furnace and is heated to 1100 DEG C -1140 DEG C, keeps the temperature 3h-4h；Step 2：In the case where purity is the nitrogen environment of 99.99%-99.999% and under 800Kpa-1000Kpa pressure conditions, the temperature of two phase stainless steel is dropped to 920 DEG C -960 DEG C in 2s, then 460 DEG C or less are dropped in 48s.
Description
Technical field
The present invention relates to material heat treatment technical field, specially a kind of heat-treatment technology method of two phase stainless steel.
Background technology
Two phase stainless steel is a kind of nickel resources economizing type stainless steel, and the volume ratio of ferrite and austenite connects in microscopic structure
Nearly 1: 1, both there is the high intensity of ferritic stainless steel, the stress corrosion performance of resistance to chloride, while there is austenitic stainless steel
Excellent in toughness and weldability, thus it is widely used in ship, chemical transport and petroleum pipeline transport field.
The microscopic structure of two phase stainless steel has conclusive influence, unsuitable heat treatment and hot-working work to its performance
Skill can cause the mechanical property of two phase stainless steel and corrosion resisting property to generate serious deterioration.Traditional heat treatment method is using box
Stove water quenching heat treatment process, the specific steps are：Step 1,920 DEG C are warming up to after part shove charge, and keep the temperature 20min；Step 2,
1140 DEG C are warming up to from 920 DEG C in 50min, and in 1140 DEG C of temperature 3h；Step 3,1060 DEG C of heat preservations are cooled to stove
50min；Step 4, it is cooled to room temperature in fast transfer to room temperature circulating water.It can be because being to enter manually using this heat treatment process
Water, time are difficult to control, and σ phases often occurs in part tissue as shown in Figure 1 and Figure 2, to above-mentioned steps treated two samples into
Row measuring mechanical property：
Sample 1：Ultimate tensile strength 706Mpa, yield strength 608Mpa, ballistic work 62J, elongation percentage 10.7%, hardness 263HRC；
Sample 2：Ultimate tensile strength 723Mpa, yield strength 555Mpa, ballistic work 82J, elongation percentage 24.2%, hardness 276HRC；
Compared to standard requirement（Ultimate tensile strength 650Mpa-850Mpa, yield strength >=480Mpa, ballistic work >=80J prolong
Stretch rate >=22%, hardness 203HRC-267HRC）, the ballistic work and elongation percentage of sample 1 be unsatisfactory for requiring, and the hardness of sample 2 is not
It meets the requirements, so causing the two phase stainless steel mechanical performance produced using prior heat treatment mode unstable, performance is poor.
Invention content
For the problem that being easy that σ phases are precipitated using batch-type furnace water quenching, bad mechanical property, the present invention provides a kind of two-phases not
Rust Heat-Treatment of Steel process, the mechanical performance of product can be promoted by using this method.
Its technical solution is such：A kind of heat-treatment technology method of two phase stainless steel, which is characterized in that it includes with
Lower step：
Step 1：Two phase stainless steel is placed in high-pressure gas-quenching vacuum furnace and is heated to 1100 DEG C -1140 DEG C, keeps the temperature 3h-4h；
Step 2：It, will in the case where purity is the nitrogen environment of 99.99%-99.999% and under 800Kpa-1000Kpa pressure conditions
The temperature of two phase stainless steel drops to 920 DEG C -960 DEG C in 2s, then 460 DEG C or less are dropped in 48s.
It is further characterized by：
The heating process of step 1 carries out under nitrogen environment, and two phase stainless steel is avoided to aoxidize；
The two-phase stainless steel chemical composition being heat-treated is by mass percentage：C≤0.03%, Si≤1%, Mn≤1%, P≤
0.035%, S≤0.025%, Cr:25.0%-27.0%, Ni:6.0%-8.0%, Cu≤1.3%, Al≤0.02%, N:0.12%-
0.22%,Mo:3.0%-5.0%, Nb≤0.05%, surplus Fe.
The two phase stainless steel for using such method processing, makees by using the nitrogen that purity is 99.99%-99.999%
For cooling medium, gas quenching is carried out to the workpiece after heating in high-pressure gas-quenching vacuum furnace, avoids the precipitation of σ phases, Er Qiejin
The good mechanical properties such as phase constitution uniformity, plasticity and toughness, in addition, heat treatment process completely in high-pressure gas-quenching vacuum furnace simultaneously
And carry out in a nitrogen environment, temperature-controllable, and completely cut off oxygen, and it avoids aoxidizing, it is more aesthetically pleasing, compared to traditional water
It quenches, since air cooling speed is slower than water, so part deformation amount smaller.
Description of the drawings
Fig. 1 is using existing heat treatment method treated two phase stainless steel metallograph（Ratio is 100:1）；
Fig. 2 is using existing heat treatment method treated two phase stainless steel metallograph（Ratio is 500:1）；
Fig. 3 is heat treatment method treated the two phase stainless steel metallograph using embodiment 1（Ratio is 100:1）；
Fig. 4 is heat treatment method treated the two phase stainless steel metallograph using embodiment 1（Ratio is 500:1）；
Fig. 5 is heat treatment method treated the two phase stainless steel metallograph using embodiment 2（Ratio is 100:1）；
Fig. 6 is heat treatment method treated the two phase stainless steel metallograph using embodiment 2（Ratio is 500:1）；
Fig. 7 is heat treatment method treated the two phase stainless steel metallograph using embodiment 3（Ratio is 100:1）；
Fig. 8 is heat treatment method treated the two phase stainless steel metallograph using embodiment 3（Ratio is 500:1）.
Specific implementation mode
The present embodiment is by mass percentage using two-phase stainless steel casting 1.4469, chemical composition：C≤0.03%,
Si≤1%, Mn≤1%, P≤0.035%, S≤0.025%, Cr:25.0%-27.0%, Ni:6.0%-8.0%, Cu≤1.3%, Al≤
0.02%,N:0.12%-0.22%,Mo:3.0%-5.0%, Nb≤0.05%, surplus Fe.
Embodiment 1：A kind of heat-treatment technology method of two phase stainless steel, it includes following steps：
Step 1：Two-phase stainless steel casting 1.4469 is placed in high-pressure gas-quenching vacuum furnace, is warming up in 3h under nitrogen protection
1100 DEG C, keep the temperature 3h；
Step 2：In the case where purity is 99.99% nitrogen environment and under 800Kpa pressure conditions, cooling Jie is used nitrogen as
Matter carries out gas quenching to the workpiece after heating, is down to 960 DEG C by 2s, is down to 460 DEG C using 48s, then proceedes to cool down
To room temperature.
1.4469 metallograph of two-phase stainless steel casting after treatment is as shown in Figure 3, Figure 4, and no σ phases are precipitated, metallographic group
Knit uniformity.
To above-mentioned steps, treated that two samples carry out measuring mechanical properties：
Sample 1：Ultimate tensile strength 718Mpa, yield strength 568Mpa, ballistic work 123J, elongation percentage 23.4%, hardness
241HRC；
Sample 2：Ultimate tensile strength 685Mpa, yield strength 522Mpa, ballistic work 100J, elongation percentage 25%, hardness 260HRC；
Meet the requirements of the standard（Ultimate tensile strength 650Mpa-850Mpa, yield strength >=480Mpa, ballistic work >=80J prolong
Stretch rate >=22%, hardness 203HRC-267HRC）.
Embodiment 2：A kind of heat-treatment technology method of two phase stainless steel, it includes following steps：
Step 1：Two-phase stainless steel casting 1.4469 is placed in high-pressure gas-quenching vacuum furnace, is warming up in 3h under nitrogen protection
1140 DEG C, keep the temperature 4h；
Step 2：In the case where purity is 99.999% nitrogen environment and under 1000Kpa pressure conditions, cooling is used nitrogen as
Medium, to after heating workpiece carry out gas quenching, be down to 920 DEG C by 1.5s, 300 DEG C be down to using 28.5s, then after
It is continuous to be cooled to room temperature.
1.4469 metallograph of two-phase stainless steel casting after treatment is as shown in Figure 5, Figure 6, and no σ phases are precipitated, metallographic group
Knit uniformity.
To above-mentioned steps, treated that two samples carry out measuring mechanical properties：
Sample 1：Ultimate tensile strength 751Mpa, yield strength 648Mpa, ballistic work 108J, elongation percentage 25.4%, hardness
254HRC；
Sample 2：Ultimate tensile strength 747Mpa, yield strength 621Mpa, ballistic work 117J, elongation percentage 26.3%, hardness
257HRC；
Meet the requirements of the standard（Ultimate tensile strength 650Mpa-850Mpa, yield strength >=480Mpa, ballistic work >=80J prolong
Stretch rate >=22%, hardness 203HRC-267HRC）.
Embodiment 3：A kind of heat-treatment technology method of two phase stainless steel, it includes following steps：
Step 1：Two-phase stainless steel casting 1.4469 is placed in high-pressure gas-quenching vacuum furnace, is warming up in 3h under nitrogen protection
1120 DEG C, keep the temperature 3.5h；
Step 2：In the case where purity is 99.995% nitrogen environment and under 900Kpa pressure conditions, cooling is used nitrogen as
Medium carries out gas quenching to the workpiece after heating, is down to 920 DEG C by 2s, is down to 350 DEG C using 38s, then proceedes to cold
But to room temperature.
1.4469 metallograph of two-phase stainless steel casting after treatment is as shown in Figure 7, Figure 8, and no σ phases are precipitated, metallographic group
Knit uniformity.
To above-mentioned steps, treated that two samples carry out measuring mechanical properties：
Sample 1：Ultimate tensile strength 735Mpa, yield strength 490Mpa, ballistic work 117J, elongation percentage 22%, hardness 238HRC；
Sample 2：Ultimate tensile strength 800Mpa, yield strength 537Mpa, ballistic work 98J, elongation percentage 24%, hardness 216HRC；
Meet the requirements of the standard（Ultimate tensile strength 650Mpa-850Mpa, yield strength >=480Mpa, ballistic work >=80J prolong
Stretch rate >=22%, hardness 203HRC-267HRC）.
Sample in embodiment 1, embodiment 2, embodiment 3, which is placed in high-pressure gas-quenching vacuum furnace, to be handled, effectively
Heating zone is：900*600*600mm, final vacuum are：8*10-3Pa, heating power are：150KW, Pressure Rise Rate are：0.5Pa/
H, be gas-cooled pressure：In 10bar, the 3h in the step 1 of each embodiment, selected in conjunction with the parameter of high-pressure gas-quenching vacuum furnace
's.
In step 1, since vacuum drying oven heats up compared to the heating of conventional air stove slowly, two phase stainless steel is heated equal in stove
It is even, therefore can directly heat to 1100 DEG C -1140 DEG C, and without being further continued for heating as carrying out heat preservation using conventional air stove,
It is easy to operate.In step 2, first fast cooling is further continued for cooling until reaching room temperature, to avoid the generation of crisp phase.
Claims (3)
1. a kind of heat-treatment technology method of two phase stainless steel, which is characterized in that it includes following steps：
Step 1：Two phase stainless steel is placed in high-pressure gas-quenching vacuum furnace and is heated to 1100 DEG C -1140 DEG C, keeps the temperature 3h-4h；
Step 2：It, will in the case where purity is the nitrogen environment of 99.99%-99.999% and under 800Kpa-1000Kpa pressure conditions
The temperature of two phase stainless steel drops to 920 DEG C -960 DEG C in 2s, then 460 DEG C or less are dropped in 48s.
2. a kind of heat-treatment technology method of two phase stainless steel according to claim 1, it is characterised in that：Step 1 adds
Thermal process carries out under nitrogen environment, and two phase stainless steel is avoided to aoxidize.
3. a kind of heat-treatment technology method of two phase stainless steel according to claim 1, it is characterised in that：It is heat-treated
Two-phase stainless steel chemical composition be by mass percentage：C≤0.03%, Si≤1%, Mn≤1%, P≤0.035%, S≤
0.025%, Cr:25.0%-27.0%, Ni:6.0%-8.0%, Cu≤1.3%, Al≤0.02%, N:0.12%-0.22%,Mo:3.0%-
5.0%, Nb≤0.05%, surplus Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626234.5A CN108754081B (en) | 2018-06-19 | 2018-06-19 | Heat treatment process method of duplex stainless steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626234.5A CN108754081B (en) | 2018-06-19 | 2018-06-19 | Heat treatment process method of duplex stainless steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108754081A true CN108754081A (en) | 2018-11-06 |
| CN108754081B CN108754081B (en) | 2020-04-14 |
Family
ID=63978481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810626234.5A Active CN108754081B (en) | 2018-06-19 | 2018-06-19 | Heat treatment process method of duplex stainless steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108754081B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835673A (en) * | 2019-12-09 | 2020-02-25 | 中航沈飞民用飞机有限责任公司 | Method for preventing stainless steel from being oxidized during heat treatment |
| CN113737095A (en) * | 2021-08-30 | 2021-12-03 | 温州瑞银不锈钢制造有限公司 | High-strength corrosion-resistant duplex stainless steel, and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6119731A (en) * | 1984-07-06 | 1986-01-28 | Sumitomo Metal Ind Ltd | Method for hot processing of two-phase stainless steel |
| CN101501234A (en) * | 2006-06-16 | 2009-08-05 | 克勒佐工业钢铁公司 | Duplex stainless steel |
| CN103469125A (en) * | 2013-09-10 | 2013-12-25 | 株洲硬质合金集团有限公司 | Heat treatment method of WC-Co-Ni3Al hard alloy |
| CN104294031A (en) * | 2014-10-14 | 2015-01-21 | 洛阳Lyc轴承有限公司 | Air quenching process for high-temperature bearing steel ferrule |
| CN105177255A (en) * | 2015-10-15 | 2015-12-23 | 东北大学 | Heat treatment technological method for ferrite-austenite duplex stainless steel |
| CN106929647A (en) * | 2017-04-25 | 2017-07-07 | 东莞市华兴隆模具钢材有限公司 | A kind of vacuum heat-treating method of mould steel |
-
2018
- 2018-06-19 CN CN201810626234.5A patent/CN108754081B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6119731A (en) * | 1984-07-06 | 1986-01-28 | Sumitomo Metal Ind Ltd | Method for hot processing of two-phase stainless steel |
| CN101501234A (en) * | 2006-06-16 | 2009-08-05 | 克勒佐工业钢铁公司 | Duplex stainless steel |
| CN103469125A (en) * | 2013-09-10 | 2013-12-25 | 株洲硬质合金集团有限公司 | Heat treatment method of WC-Co-Ni3Al hard alloy |
| CN104294031A (en) * | 2014-10-14 | 2015-01-21 | 洛阳Lyc轴承有限公司 | Air quenching process for high-temperature bearing steel ferrule |
| CN105177255A (en) * | 2015-10-15 | 2015-12-23 | 东北大学 | Heat treatment technological method for ferrite-austenite duplex stainless steel |
| CN106929647A (en) * | 2017-04-25 | 2017-07-07 | 东莞市华兴隆模具钢材有限公司 | A kind of vacuum heat-treating method of mould steel |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110835673A (en) * | 2019-12-09 | 2020-02-25 | 中航沈飞民用飞机有限责任公司 | Method for preventing stainless steel from being oxidized during heat treatment |
| CN113737095A (en) * | 2021-08-30 | 2021-12-03 | 温州瑞银不锈钢制造有限公司 | High-strength corrosion-resistant duplex stainless steel, and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108754081B (en) | 2020-04-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104928568B (en) | A kind of ferrite low-density high-strength steel and its manufacture method | |
| CN109423577B (en) | High-strength multi-phase steel tinning raw plate and manufacturing method thereof | |
| CN102251194A (en) | Two-phase stainless steel cold-rolled sheet with good surface corrosion resistance, and preparation method thereof | |
| CN106854733B (en) | A kind of manufacturing process of 14Cr17Ni2 stainless steels heavy forging | |
| CN100584963C (en) | Austenitic stainless steel as-forged solid solution treatment process after forging | |
| CN112831721B (en) | Additive manufacturing ultrahigh-strength plastic-product steel material and preparation method thereof | |
| CN105063291A (en) | Thermal processing method improving impact resistance of 13Cr9Mo2Co1NiVNbNB forged piece | |
| CN108251748A (en) | A kind of low-carbon-equivalent Nuclear containment steel plate and its production method | |
| CN106222572A (en) | A kind of thickness is the manufacture method of the cold rolling medium high carbon alloy structural steel of 0.4 0.8mm | |
| CN103215418A (en) | Thermal treatment method for super-thick steel plate | |
| CN108754081A (en) | A kind of heat-treatment technology method of two phase stainless steel | |
| CN112210737A (en) | Two-stage phase-change heat treatment method for improving hardness of Ti-6Al-4V titanium alloy | |
| CN104451073A (en) | Heat treatment method for removing delta ferrites in ferritic heat-resistant steel | |
| CN106011425A (en) | Hardening and tempering treatment technique for low-alloy heat-resistant steel fasteners | |
| CN109536685B (en) | Heat treatment method for eliminating harmful phases in duplex stainless steel | |
| CN108796181A (en) | One discharge plate member is heat-treated annealing process | |
| CN110373523B (en) | Heat treatment softening method for steel for 90 kg-grade welding wire | |
| CN110373524B (en) | Heat treatment softening process for 90 kg-grade welding wire steel | |
| CN112280942A (en) | Martensitic stainless steel 2Cr13 wire annealing process | |
| CN107267799B (en) | A kind of chrome zirconium copper alloy material and preparation method thereof | |
| CN105296799A (en) | TC11 titanium alloy and technique for optimizing performance of TC11 titanium alloy | |
| CN104109811A (en) | Mn-Cr-V ultra-high strength non-magnetic steel and production method thereof | |
| CN107513601A (en) | A kind of heat treatment method for effectively improving steel performance | |
| CN107779762A (en) | A kind of enamel steel plate and its manufacture method with excellent high temperature deformation performance | |
| CN106011642B (en) | A kind of corrosion-resistant explosive clad plate base material Pipeline Steel Plate 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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |