CN109014045A - A kind of preparation method of rich chromium cast iron tup - Google Patents
A kind of preparation method of rich chromium cast iron tup Download PDFInfo
- Publication number
- CN109014045A CN109014045A CN201810862552.1A CN201810862552A CN109014045A CN 109014045 A CN109014045 A CN 109014045A CN 201810862552 A CN201810862552 A CN 201810862552A CN 109014045 A CN109014045 A CN 109014045A
- Authority
- CN
- China
- Prior art keywords
- preparation
- cast iron
- chromium cast
- rich chromium
- tup
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- 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
- C21D5/00—Heat treatments of cast-iron
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a kind of preparation methods of rich chromium cast iron tup, method includes the following steps: (1) is added raw materials into according to the composition proportion of rich chromium cast iron tup carries out melting in induction furnace, melting is to 1450-1480 DEG C；(2) it after raw material all melting, is cast in sand mold in 1350-1420 DEG C, it is cooling, obtain blank；(3) blank is quenched in 960-1010 DEG C of heat preservation 2-6h, is then cooled to 580-640 DEG C with air-cooled mode and carries out tempering, then natural cooling.The preparation method improves high chromium cast iron material harden ability, hardenability, moreover, also improves the toughness of rich chromium cast iron tup, reduces brittle fracture tendency, improves the wearability and service life of rich chromium cast iron tup.The process conditions that the present invention only changes in casting solve the problems, such as to perplex tup performance, application value with higher for a long time.
Description
Technical field
The present invention relates to casting fields, and in particular, to a kind of preparation method of rich chromium cast iron tup.
Background technique
Tup is the key that accessory on hammer mill that the industries such as mine, building materials, electric power, metallurgy, chemical industry use, and
Vulnerable part.Because its broken object is the hard and crisp materials such as mine, rock, clinker so both having required camera lens wear-resisting
Property, and require the toughness having had.Common potassium steel tup, wears no resistance, service life is short.
Because hardness is high, tool has good wearability rich chromium cast iron, is for making the good material selection of tup.It is used as
When wear-resistant material high chromium cast iron material be because of harden ability with higher, hardenability and wearability, and it is preferable anti-oxidant and
Thermal fatigue properties, but its toughness is poor, is easy to happen brittle fracture.And different operating conditions proposes the performance of rich chromium cast iron
Different requirements is gone out, so taking corresponding heat treatment process to improve the pattern of carbide and distribution shape in rich chromium cast iron
State, and then the comprehensive mechanical property of rich chromium cast iron is improved, to obtain required rich chromium cast iron, and high cost performance is obtained, is
Urgent problem to be solved at present.
Summary of the invention
The object of the present invention is to provide a kind of preparation method of rich chromium cast iron tup, which passes through specific technique
Condition improves high chromium cast iron material harden ability, hardenability, moreover, also improves the toughness of rich chromium cast iron tup, reduces
Brittle fracture tendency, improves the wearability and service life of rich chromium cast iron tup.The present invention only changes in casting
Process conditions solve the problems, such as to perplex tup performance, application value with higher for a long time.
To achieve the goals above, the present invention provides a kind of preparation method of rich chromium cast iron tup, the preparation methods
The following steps are included:
(1) it is added raw materials into according to the composition proportion of rich chromium cast iron tup and carries out melting in induction furnace, melting to 1450-
1480℃；
(2) it after raw material all melting, is cast in sand mold in 1350-1420 DEG C, it is cooling, obtain blank；
(3) blank is quenched in 960-1010 DEG C of heat preservation 2-6h, is then cooled to 580-640 DEG C with air-cooled mode
Tempering is carried out, then natural cooling.
In the above-mentioned technical solutions, under pouring temperature of the invention, avoid shrinking excessive and scab, high temperature air quenching, in
The heat treatment of temperature tempering, obtains the matrix of high rigidity, aspect of performance improves high chromium cast iron material harden ability, hardenability, not only
In this way, also improving the toughness of rich chromium cast iron tup, brittle fracture tendency is reduced, the wearability of rich chromium cast iron tup is improved
And service life.The process conditions that the present invention only changes in casting solve perplexs asking for tup performance for a long time
Topic, application value with higher.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Specific embodiment
Detailed description of the preferred embodiments below.It should be understood that described herein specific
Embodiment is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of preparation method of rich chromium cast iron tup, and the preparation method comprises the following steps:
(1) it is added raw materials into according to the composition proportion of rich chromium cast iron tup and carries out melting in induction furnace, melting to 1450-
1480℃；
(2) it after raw material all melting, is cast in sand mold in 1350-1420 DEG C, it is cooling, obtain blank；
(3) blank is quenched in 960-1010 DEG C of heat preservation 2-6h, is then cooled to 580-640 DEG C with air-cooled mode
Tempering is carried out, then natural cooling.
In the above-mentioned technical solutions, under pouring temperature of the invention, avoid shrinking excessive and scab, high temperature air quenching, in
The heat treatment of temperature tempering, obtains the matrix of high rigidity, aspect of performance improves high chromium cast iron material harden ability, hardenability, not only
In this way, also improving the toughness of rich chromium cast iron tup, brittle fracture tendency is reduced, the wearability of rich chromium cast iron tup is improved
And service life.The process conditions that the present invention only changes in casting solve perplexs asking for tup performance for a long time
Topic, application value with higher.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, in a kind of preferred implementation of the invention
It in mode, is calculated in mass percent, the ingredient of the rich chromium cast iron tup includes C:2.6~2.8%；Si:0.4~0.8%；
Mn:0.5~1.0%；Cr:18~23%；Mo:2.2~2.6%；Cu:0.8~1.0%；S: < 0.05%；P: < 0.08%, it is remaining
Amount is Fe.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, avoid opening in quenching process medium casting
It splits, in a kind of preferred embodiment of the present invention, in step (3), before temperature rises to 960-1010 DEG C, first by blank
It is successively respectively kept the temperature in 200 DEG C, 400 DEG C, 600 DEG C and stops 2-3h.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, avoid opening in quenching process medium casting
It splits, in a kind of preferred embodiment of the present invention, in quenching process, heating rate is not more than 150 DEG C/h.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, in a kind of preferred implementation of the invention
In mode, when temperature rises to 700 DEG C, heating rate is 100-150 DEG C/h.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, it is impermeable to prevent quenching, of the invention a kind of
In preferred embodiment, when blank wall thickness is 6-20mm, the soaking time of quenching is 2-4h.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, it is impermeable to prevent quenching, of the invention a kind of
In preferred embodiment, when blank wall thickness is 20-60mm, the soaking time time of quenching is 4-6h.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, avoid cracking, of the invention a kind of excellent
In the embodiment of choosing, in blank quenching process, when temperature is at 700 DEG C or less, heating rate is not more than 50 DEG C/h.
It further include that deoxidation treatment is carried out to the molten iron of melting before casting in a kind of preferred embodiment of the present invention
The step of.For method of deoxidation, those skilled in the art can select in a wider range, such as commercially available deoxidier is added etc..?
In a kind of preferred embodiment of the present invention, before casting, in ladle plus 0.05% aluminium carries out deoxidation, is then poured.
High-intensitive in order to obtain, high rigidity and the preferable rich chromium cast iron tup of toughness, in a kind of preferred implementation of the invention
In mode, the soaking time of tempering is 4-8h.
The present invention will be described in detail by way of examples below.
Embodiment 1
A kind of preparation method of rich chromium cast iron tup, the preparation method comprises the following steps:
(1) it is calculated in mass percent, ingredient includes C:2.6~2.8%；Si:0.4~0.8%；Mn:0.5~1.0%；
Cr:18~23%；Mo:2.2~2.6%；Cu:0.8~1.0%；S: < 0.05%；P: < 0.08%, surplus Fe, according to aforementioned
The low value of composition proportion add raw materials into and carry out melting in induction furnace, melting is to 1450 DEG C；
(2) chemical component for adjusting raw material carries out deoxidation, is cast in sand mold then at 1350 DEG C after raw material all melting
In, it is cooling, obtain blank；
(3) first blank is successively respectively kept the temperature in 200 DEG C, 400 DEG C, 600 DEG C and stops 2h, then by blank in 940 DEG C of heat preservation 2h
It is quenched, in temperature-rise period, at 700 DEG C or less, heating rate control is 50 DEG C/h；When 700 DEG C of heating, heating rate
For 100 DEG C/h；
(4) after quenching, 580 DEG C of heat preservation 4h is cooled to air-cooled mode and carry out tempering, then natural cooling.
It is detected through spectrum analysis, the ingredient of finished product tup is C:2.62%；Si:0.43%；Mn:0.60%；Cr:
18.85%；Mo:2.22%；Cu:0.84%；S:0.021；P:0.027, surplus Fe.
Embodiment 2
A kind of preparation method of rich chromium cast iron tup, the preparation method comprises the following steps:
(1) it is calculated in mass percent, ingredient includes C:2.6~2.8%；Si:0.4~0.8%；Mn:0.5~1.0%；
Cr:18~23%；Mo:2.2~2.6%；Cu:0.8~1.0%；S: < 0.05%；P: < 0.08%, surplus Fe, according to aforementioned
The high level of composition proportion add raw materials into and carry out melting in induction furnace, until 1480 DEG C；
(2) material chemical component is adjusted, after raw material all melting, deoxidation is carried out, is cast in sand mold then at 1420 DEG C,
It is cooling, obtain blank；
(3) first blank is successively respectively kept the temperature in 200 DEG C, 400 DEG C, 600 DEG C and stops 3h, then by blank in 970 DEG C of heat preservation 6h
It is quenched, in temperature-rise period, at 700 DEG C or less, heating rate control is 40 DEG C/h；When 700 DEG C of heating, heating
Speed is 150 DEG C/h；
(4) after quenching, 640 DEG C of heat preservation 8h is cooled to air-cooled mode and carry out tempering, then natural cooling.
It is detected through spectrum analysis, the ingredient of finished product tup is C:2.74%；Si:0.72%；Mn:0.91%；Cr:
22.89%；Mo:2.54%；Cu:0.93%；S:0.02；P:0.02, surplus Fe.
Embodiment 3
A kind of preparation method of rich chromium cast iron tup, the preparation method comprises the following steps:
(1) it is calculated in mass percent, ingredient includes C:2.6~2.8%；Si:0.4~0.8%；Mn:0.5~1.0%；
Cr:18~23%；Mo:2.2~2.6%；Cu:0.8~1.0%；S: < 0.05%；P: < 0.08%, surplus Fe, according to aforementioned
The median of composition proportion add raw materials into and carry out melting in induction furnace, melting is to 1465 DEG C；
(2) chemical component for adjusting raw material carries out deoxidation, is cast in sand mold then at 1470 DEG C after raw material all melting
In, it is cooling, obtain blank；
(3) first blank is successively respectively kept the temperature in 200 DEG C, 400 DEG C, 600 DEG C and stops 2.5h, then blank is kept the temperature in 955 DEG C
4h is quenched, and in temperature-rise period, at 700 DEG C or less, heating rate control is 30 DEG C/h；When 700 DEG C of heating, heating speed
Degree is 120 DEG C/h；
(4) after quenching, 610 DEG C of heat preservation 6h is cooled to air-cooled mode and carry out tempering, then natural cooling.
It is detected through spectrum analysis, the ingredient of finished product tup is C:2.72%；Si:0.61%；Mn:0.75%；Cr:
20.86%；Mo:2.43%；Cu:0.93%；S:0.02；P:0.02, surplus Fe.
Detect example 1
It detects a flaw through appearance and PT, it is found that the rich chromium cast iron tup surface spikes in embodiment 1-3 are less, and flawless.
According to GB/T228.1-2010, GB/T229-2007 and GB/T 231.1-2009 standard, Gao Ge in embodiment is detected
The performance of cast iron, the tensile strength for the rich chromium cast iron that discovery embodiment 1-3 is obtained are 490-520MPa, elongation 0.8-
1.4%, HRC59-62, impact flexibility 11.1-12.2J/cm2Wherein, the performance of rich chromium cast iron obtained in embodiment 2 is most
It is excellent.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of preparation method of rich chromium cast iron tup, which is characterized in that the preparation method comprises the following steps:
(1) it is added raw materials into according to the composition proportion of rich chromium cast iron tup and carries out melting in induction furnace, melting to 1450-1480
℃；
(2) it after raw material all melting, is cast in sand mold in 1350-1420 DEG C, it is cooling, obtain blank；
(3) blank is quenched in 960-1010 DEG C of heat preservation 2-6h, is then cooled to 580-640 DEG C with air-cooled mode and carries out
Tempering, then natural cooling.
2. preparation method according to claim 1, wherein be calculated in mass percent, the ingredient of the rich chromium cast iron tup
Including C:2.6~2.8%；Si:0.4~0.8%；Mn:0.5~1.0%；Cr:18~23%；Mo:2.2~2.6%；Cu:0.8
~1.0%；S: < 0.05%；P: < 0.08%, surplus Fe.
3. preparation method according to claim 1, wherein in step (3), before temperature rises to 960-1010 DEG C,
Blank is successively respectively kept the temperature in 200 DEG C, 400 DEG C, 600 DEG C first and stops 2-3h.
4. preparation method according to claim 3, wherein in quenching process, heating rate is not more than 150 DEG C/h.
5. the preparation method according to claim 4, wherein when temperature rises to 700 DEG C, heating rate be 100-150 DEG C/
h。
6. preparation method according to claim 5, wherein when blank wall thickness is 6-20mm, the soaking time of quenching is 2-
4h。
7. preparation method according to claim 5, wherein when blank wall thickness is 20-60mm, the soaking time of quenching is 4-
6h。
8. the preparation method according to claim 4, wherein in blank quenching process, when temperature is at 700 DEG C or less,
Heating rate is not more than 50 DEG C/h.
9. preparation method according to claim 2, wherein further include being carried out at deoxidation to the molten iron of melting before casting
The step of reason.
10. according to the described in any item preparation methods of claim 2-9, wherein the soaking time of tempering is 4-8h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862552.1A CN109014045A (en) | 2018-08-01 | 2018-08-01 | A kind of preparation method of rich chromium cast iron tup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810862552.1A CN109014045A (en) | 2018-08-01 | 2018-08-01 | A kind of preparation method of rich chromium cast iron tup |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109014045A true CN109014045A (en) | 2018-12-18 |
Family
ID=64648395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810862552.1A Pending CN109014045A (en) | 2018-08-01 | 2018-08-01 | A kind of preparation method of rich chromium cast iron tup |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109014045A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0260792A2 (en) * | 1986-09-19 | 1988-03-23 | Crucible Materials Corporation | Corrosion resistant austenitic stainless steel |
| CN1421539A (en) * | 2001-11-30 | 2003-06-04 | 吴承健 | Production process of extruder pressure booster with wall board of antiwear cast iron alloy |
| CN103014550A (en) * | 2012-12-10 | 2013-04-03 | 马鞍山市恒达耐磨材料有限责任公司 | High chromium multielement alloy wear resisting ball and manufacturing method thereof |
| CN103436773A (en) * | 2013-08-21 | 2013-12-11 | 北京工业大学 | Preparation method of wear-resistant high-chromium cast iron |
| CN104164609A (en) * | 2014-07-24 | 2014-11-26 | 宁国市开源电力耐磨材料有限公司 | Compound hammerhead of hammer crusher |
| CN104164615A (en) * | 2014-08-06 | 2014-11-26 | 吴永 | Fork of forklift |
| CN105088055A (en) * | 2015-06-26 | 2015-11-25 | 南京梅山冶金发展有限公司 | Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head |
| CN105950957A (en) * | 2016-04-28 | 2016-09-21 | 宁国市开源电力耐磨材料有限公司 | High-chromium abrasion-resistant casting and preparation process thereof |
| WO2016164360A1 (en) * | 2015-04-06 | 2016-10-13 | Scoperta, Inc. | Fine-grained high carbide cast iron alloys |
-
2018
- 2018-08-01 CN CN201810862552.1A patent/CN109014045A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0260792A2 (en) * | 1986-09-19 | 1988-03-23 | Crucible Materials Corporation | Corrosion resistant austenitic stainless steel |
| CN1421539A (en) * | 2001-11-30 | 2003-06-04 | 吴承健 | Production process of extruder pressure booster with wall board of antiwear cast iron alloy |
| CN103014550A (en) * | 2012-12-10 | 2013-04-03 | 马鞍山市恒达耐磨材料有限责任公司 | High chromium multielement alloy wear resisting ball and manufacturing method thereof |
| CN103436773A (en) * | 2013-08-21 | 2013-12-11 | 北京工业大学 | Preparation method of wear-resistant high-chromium cast iron |
| CN104164609A (en) * | 2014-07-24 | 2014-11-26 | 宁国市开源电力耐磨材料有限公司 | Compound hammerhead of hammer crusher |
| CN104164615A (en) * | 2014-08-06 | 2014-11-26 | 吴永 | Fork of forklift |
| WO2016164360A1 (en) * | 2015-04-06 | 2016-10-13 | Scoperta, Inc. | Fine-grained high carbide cast iron alloys |
| CN105088055A (en) * | 2015-06-26 | 2015-11-25 | 南京梅山冶金发展有限公司 | Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head |
| CN105950957A (en) * | 2016-04-28 | 2016-09-21 | 宁国市开源电力耐磨材料有限公司 | High-chromium abrasion-resistant casting and preparation process thereof |
Non-Patent Citations (2)
| Title |
|---|
| 强文江，吴承建: "《金属材料学》", 30 September 2016, 冶金工业出版社 * |
| 鲍崇高: "《先进抗磨材料》", 31 October 2010, 西安交通大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102363859B (en) | Method for producing wear-resisting steel plate | |
| CN102330016B (en) | Preparation method of hypoeutectic high-chromium white cast iron | |
| CN103540855A (en) | High-toughness high-boron medium-chrome low-carbon wear-resisting alloy steel and preparation method thereof | |
| CN103556064A (en) | Metastable austenite high-boron high-chrome low-carbon wear-resisting alloy steel and preparation method thereof | |
| CN105856725B (en) | A kind of bimetallic bainite and martensite multi-phase wear-resistant liner plate and preparation method thereof | |
| CN104762559A (en) | Method for producing steel plate for hydrogen-contacting equipment | |
| CN103014480B (en) | Multielement microalloy low chromium white iron grinding ball and manufacturing method thereof | |
| CN105112765A (en) | High impact high chromium cast iron plate hammer and preparation method thereof | |
| CN109457086A (en) | Nb-microalloying abrasion-resistant cast steel material, its application and preparation method | |
| CN102634734A (en) | Wear-resistant hammer head for crusher and production method thereof | |
| CN103014481A (en) | Multielement low alloy bainite spheroidal graphite cast iron grinding ball and manufacturing method thereof | |
| CN103627993A (en) | Alloy steel hammerhead material for small-size crusher and preparation method thereof | |
| CN104057066A (en) | Method for manufacturing dual-metal dual-liquid composite hammer head | |
| CN104911494B (en) | Boron-contained wear-resisting steel casting material and preparation method thereof | |
| CN102234734A (en) | Production process of modified alloy ball iron roller | |
| CN103966498A (en) | High-chromium white abrasion-resistant cast iron abrasion-resistant material and production method thereof | |
| CN104651735B (en) | Low-alloy wear-resistant steel with toughness being more than 50J/cm2 and production method thereof | |
| CN103614658A (en) | High-strength wear-resistant low-carbon steel material and preparation method thereof | |
| CN103789678B (en) | A kind of Alloy steel material for drill and preparation method thereof | |
| CN101319289B (en) | Smelting method for high manganese steel casting | |
| CN106086682B (en) | A kind of high-strength die steel and its processing method | |
| CN105463302B (en) | A kind of preparation method of high rigidity spheroidal graphite cast-iron tup | |
| CN109014044A (en) | A kind of preparation method of rich chromium cast iron tup | |
| CN103614659A (en) | An austenite alloy steel material used for an internal combustion engine and a preparation method of the alloy steel material | |
| CN106498277A (en) | A kind of special thickness high-strength and high-ductility engineering machinery modulation steel plate and production method |
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: 20181218 |