CN105369139A - Break-down roller made of special alloy semi-steel material and manufacturing method of break-down roller - Google Patents
Break-down roller made of special alloy semi-steel material and manufacturing method of break-down roller Download PDFInfo
- Publication number
- CN105369139A CN105369139A CN201510686925.0A CN201510686925A CN105369139A CN 105369139 A CN105369139 A CN 105369139A CN 201510686925 A CN201510686925 A CN 201510686925A CN 105369139 A CN105369139 A CN 105369139A
- Authority
- CN
- China
- Prior art keywords
- roll
- rollcogging
- carry out
- break
- normalizing
- 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
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- 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
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- 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
-
- 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
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
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)
- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
Abstract
The invention discloses a break-down roller made of a special alloy semi-steel material and a manufacturing method of the break-down roller and belongs to the field of roller manufacturing. The material is prepared from, by weight percent, 0.80%-1.30% of C, 0.30%-0.70% of Si, 0.70%-1.30% of Mn, not larger than 0.03% of P, not larger than 0.03% of S, 0.80%-2.50% of Cr, 0.50%-1.50% of Ni, 0.40%-1.00% of Mo and the balance Fe and inevitable impurities. The manufacturing method of the break-down roller includes the steps of electric arc furnace smelting, external refining, casting molding through a bottom casting method after refining, annealing after steel billet unpacking, machining on a steel billet, and normalizing and tempering on the machined and molded break-down roller. The break-down roller has the comprehensive performance of high strength, good heat crack resistance and abrasion resistance, low hardness fall and the like, and can adapt to complex rolling conditions of a structural steel-rail beam mill break-down rack.
Description
Technical field
The present invention relates to a kind of rollcogging-roll and manufacture method thereof of specific alloy half steel material, for the cogging frame of shaped steel-beam-and-rail universal mill.
Background technology
The cogging frame rolling temperature of shaped steel-beam-and-rail universal mill is high, rolling pressure large, requires that roll has good heat crack resistance and higher intensity.For ensureing surface quality and the dimensional precision of stocking, require that roll has certain wear resistance.In addition due to sectional shape usually comparatively complicated, be out of shape very uneven in the operation of rolling, the thermal stress that the temperature at each position of shaped steel, deflection difference cause each position of roll to be born, rolling load differ greatly.Therefore, for realizing uniform wear, require that roll has approximate hardness bottom body surface and pass.
Because Alloy Cast Steel has certain intensity and toughness concurrently, domestic shaped steel-beam-and-rail universal mill cogging frame generally adopts Alloy Cast Steel material, but due to the singularity of section rolling, can cause the not wear-resisting phenomenon in alloy cast steel roll local.And traditional half steel material is because carbon content is high, undercapacity, easily cause the generation of the serious accidents such as roll breakage.Therefore, shaped steel-beam-and-rail universal mill rollcogging-roll should have the over-all propertieies such as high strength, good heat crack resistance, wear resistance and soft drop.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of rollcogging-roll and manufacture method thereof of specific alloy half steel material, make rollcogging-roll possess high strength, good heat crack resistance and the over-all properties such as wear resistance and soft drop, the rolling condition of shaped steel-structural mill cogging frame complexity can be adapted to.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of rollcogging-roll of specific alloy half steel material, chemical composition in its material and weight percentage are: C:0.80 ~ 1.30%, Si:0.30 ~ 0.70%, Mn:0.70 ~ 1.30%, P≤0.03%, S≤0.03%, Cr:0.80 ~ 2.50%, Ni:0.50 ~ 1.50%, Mo:0.40 ~ 1.00%, all the other are Fe and inevitable impurity.
The further improvement of technical solution of the present invention is: a kind of rollcogging-roll manufacture method of specific alloy half steel material, comprises the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
B, refining terminate rear employing bottom pouring and carry out casting;
C, steel billet carry out anneal after unpacking, and annealing temperature is 700 DEG C ~ 800 DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper.
The further improvement of technical solution of the present invention is: described steps A oxidation style smelt in oxidation period adopt oxidizing reaction to complete de-P, de-S and the gas removed in metal and non-metallic inclusion, reduction period takes diffusive deoxidation method to remove oxygen in molten steel.
The further improvement of technical solution of the present invention is: in described step C after casting complete to emitting notch portion to carry out electrically heated.
The further improvement of technical solution of the present invention is: in described step e, normalizing+temper is specially: first carry out normalizing treatment to rollcogging-roll, normalizing temperature is 900 DEG C ~ 980 DEG C, the normalizing type of cooling adopts the type of cooling of air-cooled+air cooling, when roll rolipass design is to 450 ~ 500 DEG C, stop cooling, carry out temper, tempering temperature is 550 DEG C ~ 600 DEG C.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
Because the carbon content in specific alloy half steel is between Alloy Cast Steel and traditional half steel, the more traditional half steel of the intensity of rollcogging-roll, heat crack resistance is increased, wear resistance makes moderate progress than Alloy Cast Steel material, and the over-all properties of rollcogging-roll can be applicable to the rolling condition of shaped steel-structural mill cogging frame complexity.
Fusion process adopts the technique of melting+external refining in arc furnace, improves Smelting Effect, makes the mass ratio of molten steel adopt the higher of general electric arc furnace smelting, reduces the generation of the defects such as slag inclusion in rollcogging-roll.
Adopting bottom pouring to pour into a mould, to emitting notch portion to carry out electrically heated after casting complete, preventing the generation of shrinkage cavity in rollcogging-roll.
The mode of air-cooled+air cooling is taked in normalizing cooling in the rollcogging-roll thermal treatment shaping to mechanical workout, guarantees to reach suitable hardness, can avoid again that cooling rate is too fast to be cracked, and improves the quality of rollcogging-roll.
Accompanying drawing explanation
Fig. 1 is the metallographic structure photo of rollcogging-roll of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further details:
A kind of rollcogging-roll of specific alloy half steel material, chemical composition in rollcogging-roll material and weight percentage are: C:0.80 ~ 1.30%, Si:0.30 ~ 0.70%, Mn:0.70 ~ 1.30%, P≤0.03%, S≤0.03%, Cr:0.80 ~ 2.50%, Ni:0.50 ~ 1.50%, Mo:0.40 ~ 1.00%, all the other are Fe and inevitable impurity.Because the carbon content in specific alloy half steel is between Alloy Cast Steel and traditional half steel, the more traditional half steel of the intensity of rollcogging-roll, heat crack resistance is increased, wear resistance makes moderate progress than Alloy Cast Steel material, and the over-all properties of rollcogging-roll can be applicable to the rolling condition of shaped steel-structural mill cogging frame complexity.
This rollcogging-roll manufacture method comprises the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
Matching starting material by the content proportioning of each chemical composition of design objective and put into electric arc furnace adopts oxidation style to carry out melting, smelting temperature is 1500 DEG C ~ 1600 DEG C, heat-up rate is 50 DEG C/h, adopt oxidation period of melting oxidizing reaction to complete de-P, de-S and the gas removed in metal and non-metallic inclusion, reduction period takes diffusive deoxidation method to remove oxygen in molten steel.After the preliminary melting of electric arc furnace terminates, carry out external refining, improve quality of molten steel.
Fusion process adopts the technique of melting+external refining in arc furnace, improves Smelting Effect, makes the mass ratio of molten steel adopt the higher of general electric arc furnace smelting, reduces the generation of the defects such as slag inclusion in rollcogging-roll.
B, refining terminate rear employing bottom pouring and carry out casting;
Casting process adopts mould assembling bottom pouring to pour into a mould, and makes molten steel produce and rotate during cast, inclusion is converged in center and emits port part along with molten steel rises to take to, obtaining roller blank.To emitting notch portion to carry out electrically heated after casting complete, prevent the generation of shrinkage cavity in rollcogging-roll.
C, steel billet carry out anneal after unpacking, and annealing temperature is 700 DEG C ~ 800 DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper;
Normalizing temperature is 900 DEG C ~ 980 DEG C, and the normalizing type of cooling adopts the blowing+air cooling type of cooling, guarantees to reach suitable hardness, can avoid again that cooling rate is too fast to be cracked, the quality of raising rollcogging-roll.When roll rolipass design is to 500 DEG C, stop cooling, carry out temper, tempering temperature is 550 DEG C ~ 600 DEG C, and basis of time roll specification is determined.
After above-mentioned process, the working lining hardness of rollcogging-roll is 46 ~ 49HSD, and as shown in Figure 1, the tensile strength of rollcogging-roll roll neck is 930 ~ 955MPa in metallographic structure.
Embodiment 1
Chemical composition in rollcogging-roll material and weight percentage are: C:0.80%, Si:0.30%, Mn:0.70%, P:0.01%, S:0.0:1%, Cr:0.80%, Ni:0.50%, Mo:0.40%, and all the other are Fe and inevitable impurity.
This rollcogging-roll manufacture method comprises the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
Matching starting material by the content proportioning of each chemical composition of design objective and put into electric arc furnace adopts oxidation style to carry out melting, and smelting temperature is 1500 DEG C DEG C, and heat-up rate is 50 DEG C/h.
B, refining terminate rear employing bottom pouring and carry out casting;
Casting process adopts mould assembling bottom pouring to pour into a mould, to emitting notch portion to carry out electrically heated after casting complete.
C, steel billet carry out anneal after unpacking, and annealing temperature is 700 DEG C DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper;
Normalizing temperature is 900 DEG C DEG C, and the normalizing type of cooling adopts the blowing+air cooling type of cooling.When roll rolipass design is to 500 DEG C, stop cooling, carry out temper, tempering temperature is 550 DEG C.
After above-mentioned process, the working lining hardness of rollcogging-roll is 46HSD, and the tensile strength of rollcogging-roll roll neck is 930MPa.
Embodiment 2
A rollcogging-roll for specific alloy half steel material, the chemical composition in rollcogging-roll material and weight percentage are: C:1.00%, Si:0.50%, Mn:1.00%, P:0.02%, S:0.02%, Cr:1.50%, Ni:1.00%, Mo:0.70%, all the other are Fe and inevitable impurity.
This rollcogging-roll manufacture method comprises the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
Matching starting material by the content proportioning of each chemical composition of design objective and put into electric arc furnace adopts oxidation style to carry out melting, and smelting temperature is 1550 DEG C, and heat-up rate is 50 DEG C/h.
B, refining terminate rear employing bottom pouring and carry out casting;
Casting process adopts mould assembling bottom pouring to pour into a mould, to emitting notch portion to carry out electrically heated after casting complete.
C, steel billet carry out anneal after unpacking, and annealing temperature is 750 DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper;
Normalizing temperature is 950 DEG C, and the normalizing type of cooling adopts the blowing+air cooling type of cooling, and when roll rolipass design is to 500 DEG C, stop cooling, carry out temper, tempering temperature is 570 DEG C.
After above-mentioned process, the working lining hardness of rollcogging-roll is 47HSD, and the tensile strength of rollcogging-roll roll neck is 942MPa.
Embodiment 3
Chemical composition in rollcogging-roll material and weight percentage are: C:1.30%, Si:0.70%, Mn:1.30%, P:0.03%, S:0.03%, Cr:2.50%, Ni:1.50%, Mo:1.00%, and all the other are Fe and inevitable impurity.
This rollcogging-roll manufacture method comprises the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
Matching starting material by the content proportioning of each chemical composition of design objective and put into electric arc furnace adopts oxidation style to carry out melting, and smelting temperature is 1600 DEG C, and heat-up rate is 50 DEG C/h.
B, refining terminate rear employing bottom pouring and carry out casting;
Casting process adopts mould assembling bottom pouring to pour into a mould, to emitting notch portion to carry out electrically heated after casting complete.
C, steel billet carry out anneal after unpacking, and annealing temperature is 800 DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper;
Normalizing temperature is 980 DEG C, and the normalizing type of cooling adopts the blowing+air cooling type of cooling, and when roll rolipass design is to 500 DEG C, stop cooling, carry out temper, tempering temperature is 600 DEG C.
After above-mentioned process, the working lining hardness of rollcogging-roll is 49HSD, and the tensile strength of rollcogging-roll roll neck is 955MPa.
Claims (5)
1. the rollcogging-roll of a specific alloy half steel material, it is characterized in that chemical composition in its material and weight percentage are: C:0.80 ~ 1.30%, Si:0.30 ~ 0.70%, Mn:0.70 ~ 1.30%, P≤0.03%, S≤0.03%, Cr:0.80 ~ 2.50%, Ni:0.50 ~ 1.50%, Mo:0.40 ~ 1.00%, all the other are Fe and inevitable impurity.
2. a rollcogging-roll manufacture method for specific alloy half steel material, is characterized in that comprising the following steps:
A, starting material are put into electric arc furnace adopt the preliminary melting of oxidation style, the preliminary melting of electric arc furnace terminates to carry out external refining to liquation afterwards;
B, refining terminate rear employing bottom pouring and carry out casting;
C, steel billet carry out anneal after unpacking, and annealing temperature is 700 DEG C ~ 800 DEG C;
D, steel billet is carried out mechanical workout;
E, the rollcogging-roll shaping to mechanical workout carry out normalizing+temper.
3. the rollcogging-roll manufacture method of a kind of specific alloy half steel material according to claim 2, it is characterized in that: described steps A oxidation style smelt in oxidation period adopt oxidizing reaction to complete de-P, de-S and the gas removed in metal and non-metallic inclusion, reduction period takes diffusive deoxidation method to remove oxygen in molten steel.
4. the rollcogging-roll manufacture method of a kind of specific alloy half steel material according to claim 2, is characterized in that: in described step C after casting complete to emitting notch portion to carry out electrically heated.
5. the rollcogging-roll manufacture method of a kind of specific alloy half steel material according to claim 2, it is characterized in that: in described step e, normalizing+temper is specially: first normalizing treatment is carried out to rollcogging-roll, normalizing temperature is 900 DEG C ~ 980 DEG C, the normalizing type of cooling adopts the type of cooling of air-cooled+air cooling, when roll rolipass design is to 450 ~ 500 DEG C, stop cooling, carry out temper, tempering temperature is 550 DEG C ~ 600 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510686925.0A CN105369139B (en) | 2015-10-22 | 2015-10-22 | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510686925.0A CN105369139B (en) | 2015-10-22 | 2015-10-22 | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105369139A true CN105369139A (en) | 2016-03-02 |
| CN105369139B CN105369139B (en) | 2017-09-29 |
Family
ID=55371762
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510686925.0A Active CN105369139B (en) | 2015-10-22 | 2015-10-22 | The rollcogging-roll and its manufacture method of a kind of specific alloy half steel material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105369139B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884123A (en) * | 2016-12-29 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | Universal mill alloy cast steel material BD rolls and its manufacture method |
| CN107326167A (en) * | 2017-06-19 | 2017-11-07 | 太仓市钧胜轧辊有限公司 | A kind of processing technology of roll for cold rolling |
| CN112680586A (en) * | 2020-12-14 | 2021-04-20 | 成都三强轧辊股份有限公司 | Heat treatment method of large roller and product thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080329A (en) * | 1992-06-13 | 1994-01-05 | 首钢总公司 | The tilting roller cover and the manufacture method thereof of half steel material |
| CN103334060A (en) * | 2013-07-18 | 2013-10-02 | 邢台精诚轧辊有限公司 | Graphite tool steel used for metal calendaring and manufacturing method of graphite tool steel |
| CN103469109A (en) * | 2013-09-16 | 2013-12-25 | 中钢集团邢台机械轧辊有限公司 | Roughing roll made of graphitizable steel material and manufacturing method thereof |
-
2015
- 2015-10-22 CN CN201510686925.0A patent/CN105369139B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1080329A (en) * | 1992-06-13 | 1994-01-05 | 首钢总公司 | The tilting roller cover and the manufacture method thereof of half steel material |
| CN103334060A (en) * | 2013-07-18 | 2013-10-02 | 邢台精诚轧辊有限公司 | Graphite tool steel used for metal calendaring and manufacturing method of graphite tool steel |
| CN103469109A (en) * | 2013-09-16 | 2013-12-25 | 中钢集团邢台机械轧辊有限公司 | Roughing roll made of graphitizable steel material and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106884123A (en) * | 2016-12-29 | 2017-06-23 | 中钢集团邢台机械轧辊有限公司 | Universal mill alloy cast steel material BD rolls and its manufacture method |
| CN107326167A (en) * | 2017-06-19 | 2017-11-07 | 太仓市钧胜轧辊有限公司 | A kind of processing technology of roll for cold rolling |
| CN112680586A (en) * | 2020-12-14 | 2021-04-20 | 成都三强轧辊股份有限公司 | Heat treatment method of large roller and product thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105369139B (en) | 2017-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109161658B (en) | Steel for main shaft bearing of wind driven generator and production method thereof | |
| CN106947908B (en) | A kind of method of continuous casting electroslag production 4Cr5MoSiV1 die steels | |
| CN103014534B (en) | Cast hot work die steel and processing method thereof | |
| CN103014511B (en) | High-toughness cold-work mould steel and complete processing thereof | |
| CN103014495B (en) | High-tenacity high-wear-resistance cold-work die steel and processing method thereof | |
| CN105063512A (en) | Plastic die steel and manufacturing method thereof | |
| CN103409688B (en) | Large forged high-speed steel cold roll and manufacturing method thereof | |
| CN104525889A (en) | High-speed steel roller manufacturing method | |
| CN1686666A (en) | Production method of large high chromium steel cold roll blank | |
| CN112695255B (en) | Preparation method of ferrite martensite steel clad tube | |
| CN105033227A (en) | Manufacturing method for high-vanadium high-speed steel composite roll | |
| CN103243268A (en) | High-quality H13 rear earth mold steel and production method thereof | |
| CN101503781A (en) | Pipe for crane boom and manufacturing method thereof | |
| CN102373352A (en) | Preparation method of forging aluminum alloy for wheel hub swaging | |
| CN104532135A (en) | Cold work die steel and preparation method thereof | |
| CN104438337A (en) | Wear resistance rolling roll for strip steel cold rolling and manufacturing method of wear resistance rolling roll | |
| CN105369139A (en) | Break-down roller made of special alloy semi-steel material and manufacturing method of break-down roller | |
| CN113999955A (en) | Forging die for heat insulation piece and forming process thereof | |
| CN105543653A (en) | Plastic die steel with high intensity, high toughness and high corrosion resistance and production method thereof | |
| CN102876996A (en) | Austenitic hot-work die steel and preparation method thereof | |
| CN104250712A (en) | Method for manufacturing large-size, high-toughness and wear-resistant alloy roller | |
| CN104152809B (en) | A kind of alloy plug | |
| CN105463336A (en) | Plastic die steel with high strength, toughness, corrosion resistance and polishing performance and production method | |
| CN113846263B (en) | High-toughness heat-resistant steel without delta ferrite and preparation method thereof | |
| CN101781738A (en) | Method for producing long-life die casting die material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |