CN110923566A - Three way catalyst converter support - Google Patents
Three way catalyst converter support Download PDFInfo
- Publication number
- CN110923566A CN110923566A CN201910776871.5A CN201910776871A CN110923566A CN 110923566 A CN110923566 A CN 110923566A CN 201910776871 A CN201910776871 A CN 201910776871A CN 110923566 A CN110923566 A CN 110923566A
- Authority
- CN
- China
- Prior art keywords
- way catalytic
- catalytic support
- rolled steel
- steel plate
- quenching
- 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
Images
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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- 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
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- 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
- C22C38/04—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
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Heat Treatment Of Sheet Steel (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
The invention discloses a three-way catalytic support which is formed by punching and molding a hot-rolled steel plate, wherein the hot-rolled steel plate comprises the following components in percentage by mass: c: 0.05 to 0.18%, Si: 0.3-1.0%, Mn: 0.8-1.7%, V: 0.02 to 0.08%, Nb: 0.01-0.06%, Ti: 0.02 to 0.09%, Al: 0.03-0.05%, Cr: 0.02 to 0.1%, Ni: 0.2-0.4%, Gu: 0.1-0.5%, the balance being Fe. The three-way catalytic support has the advantages that the problems that the strength and the toughness of the conventional three-way catalytic support are not high, and the three-way catalytic support is damaged due to the fact that the material is sticky to a die during molding, and the surface of a product is roughened due to the fact that the die is heated through multiple times of high-speed stamping are solved.
Description
Technical Field
The invention belongs to the technical field of automobile part processing, and particularly relates to a three-way catalytic support.
Background
The market competition of the existing cars is increasingly intensified, the produced car models are required to be continuously adaptive to the market trend from the aspects of appearance and practicability, otherwise, the shares of the products of the car models are difficult to obtain in the market, and therefore, new car models are all introduced to adapt to the market. And the new vehicle type is required to be designed and developed according to parts of the new vehicle type.
In the prior art, the strength and the toughness of the ternary catalytic support for the automobile parts are not high, and meanwhile, when the ternary catalytic support is molded, the ternary catalytic support is damaged due to the fact that the material characteristics are more sticky to a die, and the surface of a product is roughened due to the fact that the die is heated through multiple times of high-speed stamping.
Disclosure of Invention
The invention aims to solve the problems that the existing ternary catalytic support is low in strength and toughness, and the surface of a product is roughened due to the fact that the material characteristic is sticky to a die and the die is heated after multiple times of high-speed stamping when the ternary catalytic support is formed.
In order to achieve the purpose, the technical scheme provided by the invention is that the three-way catalytic support is formed by punching and molding a hot-rolled steel plate, and the hot-rolled steel plate comprises the following components in percentage by mass:
c: 0.05 to 0.18%, Si: 0.3-1.0%, Mn: 0.8-1.7%, V: 0.02 to 0.08%, Nb: 0.01-0.06%, Ti: 0.02 to 0.09%, Al: 0.03-0.05%, Cr: 0.02 to 0.1%, Ni: 0.2-0.4%, Gu: 0.1-0.5%, the balance being Fe.
Preferably, the hot rolled steel sheet further contains, in mass percent, P: 0.01-0.04%, S: 0.02-0.035%.
Preferably, the preparation method of the hot rolled steel plate of the three-way catalytic bracket comprises the following steps:
the method comprises the following steps: heating and melting the raw material of the hot-rolled steel plate in a heating furnace, and then discharging and pouring to obtain a plate;
step two: placing the plate blank on a roller way of a heating furnace for heating, then sending the plate blank into a roughing mill for roughing through the roller way, and removing secondary iron oxide scales on the surface of the plate blank by using a high-pressure water descaling header;
step three: then, the steel strip is sent to a finishing mill to be made into a steel strip;
step four: and sending the steel plate into a quenching furnace for quenching, and then carrying out secondary tempering to obtain the hot rolled steel plate.
Preferably, in the first step, the heating furnace temperature is 1500-.
Preferably, in the fourth step, the quenching temperature of the quenching furnace is 900-.
Preferably, the three-way catalytic support punch forming die is subjected to TD treatment:
the method comprises the following steps: putting the mold into a medium containing vanadium carbide for heating at the temperature of 850-;
step two: putting the die into a quenching furnace for quenching at the temperature of 980-;
step three: annealing is carried out at the temperature of 650-710 ℃.
Preferably, the three-way catalytic support is formed by punching:
the method comprises the following steps: putting the hot rolled steel plate into a plate shearing machine for processing;
step two: then punching and lettering;
step three: and (5) feeding the three-way catalytic support into a mold subjected to TD (time division) treatment for punch forming to obtain the three-way catalytic support.
By adopting the technical scheme, the invention has the beneficial effects that: the three-way catalytic support manufactured by the hot rolled steel plate has the characteristics of high impact toughness and high wear resistance, and the strength of the three-way catalytic support is improved through quenching and tempering treatment; the surface of the die is subjected to TD treatment, so that a hardened layer is formed on the surface of the die and is used for protecting the die from being damaged when the die is contacted with stainless steel, and the high performance and high quality of the die can be ensured after the TD treatment, so that the appearance requirement of a product is met, and the maintenance period is longer and the service life is longer compared with that of other dies; the three-way catalytic support is manufactured by punching and forming the hot rolled steel plate, and compared with the traditional method of carrying out single hot rolling and pouring, the three-way catalytic support is high in forming efficiency and low in cost.
Drawings
FIG. 1 is a schematic diagram of a hot rolled steel plate manufacturing method of a three-way catalytic stent according to the present invention;
FIG. 2 is a schematic view of a three-way catalytic support punch forming die of the present invention performing TD processing;
fig. 3 is a schematic view of the punch forming of the three-way catalytic support of the present invention.
Detailed Description
The present invention will be further described with reference to the following examples.
The first embodiment is as follows: the invention provides a three-way catalytic support which is formed by punching and molding a hot-rolled steel plate, wherein the hot-rolled steel plate comprises the following components in percentage by mass:
c: 0.06%, Si: 0.3%, Mn: 0.9%, V: 0.03%, Nb: 0.02%, Ti: 0.03%, Al: 0.035%, Cr: 0.03%, Ni: 0.21%, Gu: 0.12%, the balance being Fe.
The hot rolled steel plate further comprises the following components in percentage by mass: 0.02%, S: 0.028 percent.
The preparation method of the hot rolled steel plate of the three-way catalytic support comprises the following steps: the method comprises the following steps: heating and melting the raw material of the hot-rolled steel plate in a heating furnace, and then discharging and pouring to obtain a plate; step two: placing the plate blank on a roller way of a heating furnace for heating, then sending the plate blank into a roughing mill for roughing through the roller way, and removing secondary iron oxide scales on the surface of the plate blank by using a high-pressure water descaling header; step three: then, the steel strip is sent to a finishing mill to be made into a steel strip; step four: sending the steel plate into a quenching furnace for quenching, and then carrying out secondary tempering to obtain a hot rolled steel plate; in the first step, the temperature of the heating furnace is 1500 ℃, in the second step, the heating temperature on the roller way of the heating furnace is 500 ℃, and in the third step, the hot rolling temperature in the finishing mill is 800 ℃; in the fourth step, the quenching temperature of the quenching furnace is 900 ℃, the first tempering temperature is 480 ℃, and the second tempering temperature is 560 ℃.
The three-way catalytic support punch forming die carries out TD treatment: the method comprises the following steps: putting the die into a medium containing vanadium carbide for heating, wherein the temperature is 850 ℃; step two: putting the die into a quenching furnace for quenching at 980 ℃; step three: tempering is carried out, and the tempering temperature is 650 ℃.
The three-way catalytic support is punched and formed by the following steps: the method comprises the following steps: putting the hot rolled steel plate into a plate shearing machine for processing; step two: then punching and lettering; step three: and (5) feeding the three-way catalytic support into a mold subjected to TD (time division) treatment for punch forming to obtain the three-way catalytic support.
Example two: the invention provides a three-way catalytic support which is formed by punching and molding a hot-rolled steel plate, wherein the hot-rolled steel plate comprises the following components in percentage by mass:
c: 0.1%, Si: 0.6%, Mn: 1.4%, V: 0.05%, Nb: 0.035%, Ti: 0.05%, Al: 0.04%, Cr: 0.06%, Ni: 0.23%, Gu: 0.3%, the balance being Fe.
The hot rolled steel plate further comprises the following components in percentage by mass: 0.03%, S: 0.03 percent.
The preparation method of the hot rolled steel plate of the three-way catalytic support comprises the following steps: the method comprises the following steps: heating and melting the raw material of the hot-rolled steel plate in a heating furnace, and then discharging and pouring to obtain a plate; step two: placing the plate blank on a roller way of a heating furnace for heating, then sending the plate blank into a roughing mill for roughing through the roller way, and removing secondary iron oxide scales on the surface of the plate blank by using a high-pressure water descaling header; step three: then, the steel strip is sent to a finishing mill to be made into a steel strip; step four: sending the steel plate into a quenching furnace for quenching, and then carrying out secondary tempering to obtain a hot rolled steel plate; in the first step, the temperature of the heating furnace is 1700 ℃, in the second step, the heating temperature on the roller way of the heating furnace is 550 ℃, and in the third step, the hot rolling temperature in the finishing mill is 850 ℃; in the fourth step, the quenching temperature of the quenching furnace is 1000 ℃, the first tempering temperature is 520 ℃, and the second tempering temperature is 610 ℃.
The three-way catalytic support punch forming die carries out TD treatment: the method comprises the following steps: putting the die into a medium containing vanadium carbide for heating, wherein the temperature is 950 ℃; step two: putting the die into a quenching furnace for quenching at 1010 ℃; step three: tempering is carried out, and the tempering temperature is 690 ℃.
The three-way catalytic support is punched and formed by the following steps: the method comprises the following steps: putting the hot rolled steel plate into a plate shearing machine for processing; step two: then punching and lettering; step three: and (5) feeding the three-way catalytic support into a mold subjected to TD (time division) treatment for punch forming to obtain the three-way catalytic support.
Example three: the invention provides a three-way catalytic support which is formed by punching and molding a hot-rolled steel plate, wherein the hot-rolled steel plate comprises the following components in percentage by mass:
c: 0.18%, Si: 1.0%, Mn: 1.7%, V: 0.08%, Nb: 0.06%, Ti: 0.09%, Al: 0.05%, Cr: 0.1%, Ni: 0.4%, Gu: 0.5%, the balance being Fe.
The hot rolled steel plate further comprises the following components in percentage by mass: 0.04%, S: 0.035%.
The preparation method of the hot rolled steel plate of the three-way catalytic support comprises the following steps: the method comprises the following steps: heating and melting the raw material of the hot-rolled steel plate in a heating furnace, and then discharging and pouring to obtain a plate; step two: placing the plate blank on a roller way of a heating furnace for heating, then sending the plate blank into a roughing mill for roughing through the roller way, and removing secondary iron oxide scales on the surface of the plate blank by using a high-pressure water descaling header; step three: then, the steel strip is sent to a finishing mill to be made into a steel strip; step four: sending the steel plate into a quenching furnace for quenching, and then carrying out secondary tempering to obtain a hot rolled steel plate; in the first step, the temperature of the heating furnace is 1800 ℃, in the second step, the heating temperature on the roller way of the heating furnace is 600 ℃, and in the third step, the hot rolling temperature in the finishing mill is 900 ℃; in the fourth step, the quenching temperature of the quenching furnace is 1100 ℃, the first tempering temperature is 600 ℃, and the second tempering temperature is 680 ℃.
The three-way catalytic support punch forming die carries out TD treatment: the method comprises the following steps: putting the die into a medium containing vanadium carbide for heating, wherein the temperature is 1050 ℃; step two: putting the die into a quenching furnace for quenching at the temperature of 1080 ℃; step three: tempering is carried out at a temperature of 710 ℃.
The three-way catalytic support is punched and formed by the following steps: the method comprises the following steps: putting the hot rolled steel plate into a plate shearing machine for processing; step two: then punching and lettering; step three: and (5) feeding the three-way catalytic support into a mold subjected to TD (time division) treatment for punch forming to obtain the three-way catalytic support.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A three-way catalytic stent, comprising: the three-way catalytic support is formed by punching and molding hot rolled steel plates, and the hot rolled steel plates comprise the following components in percentage by mass:
c: 0.05 to 0.18%, Si: 0.3-1.0%, Mn: 0.8-1.7%, V: 0.02 to 0.08%, Nb: 0.01-0.06%, Ti: 0.02 to 0.09%, Al: 0.03-0.05%, Cr: 0.02 to 0.1%, Ni: 0.2-0.4%, Gu: 0.1-0.5%, the balance being Fe.
2. A three-way catalytic support according to claim 1, wherein: the hot rolled steel plate further comprises the following components in percentage by mass: 0.01-0.04%, S: 0.02-0.035%.
3. A three-way catalytic support according to claim 1, wherein: the preparation method of the hot rolled steel plate of the three-way catalytic support comprises the following steps:
the method comprises the following steps: heating and melting the raw material of the hot-rolled steel plate in a heating furnace, and then discharging and pouring to obtain a plate;
step two: placing the plate blank on a roller way of a heating furnace for heating, then sending the plate blank into a roughing mill for roughing through the roller way, and removing secondary iron oxide scales on the surface of the plate blank by using a high-pressure water descaling header;
step three: then, the steel strip is sent to a finishing mill to be made into a steel strip;
step four: and sending the steel plate into a quenching furnace for quenching, and then carrying out secondary tempering to obtain the hot rolled steel plate.
4. A three-way catalytic support according to claim 3, wherein: in the first step, the temperature of the heating furnace is 1500-.
5. A three-way catalytic support according to claim 3, wherein: in the fourth step, the quenching temperature of the quenching furnace is 900-.
6. A three-way catalytic support according to claim 1, wherein: the three-way catalytic support punch forming die carries out TD treatment:
the method comprises the following steps: putting the mold into a medium containing vanadium carbide for heating at the temperature of 850-;
step two: putting the die into a quenching furnace for quenching at the temperature of 980-;
step three: annealing is carried out at the temperature of 650-710 ℃.
7. A three-way catalytic support according to any of claims 1-6, wherein: the three-way catalytic support is punched and formed by the following steps:
the method comprises the following steps: putting the hot rolled steel plate into a plate shearing machine for processing;
step two: then punching and lettering;
step three: and (5) feeding the three-way catalytic support into a mold subjected to TD (time division) treatment for punch forming to obtain the three-way catalytic support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776871.5A CN110923566A (en) | 2019-08-22 | 2019-08-22 | Three way catalyst converter support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910776871.5A CN110923566A (en) | 2019-08-22 | 2019-08-22 | Three way catalyst converter support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110923566A true CN110923566A (en) | 2020-03-27 |
Family
ID=69856622
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910776871.5A Pending CN110923566A (en) | 2019-08-22 | 2019-08-22 | Three way catalyst converter support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110923566A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739975A (en) * | 2017-08-30 | 2018-02-27 | 宁波亿润汽车零部件有限公司 | A kind of ternary catalyzing unit support |
-
2019
- 2019-08-22 CN CN201910776871.5A patent/CN110923566A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107739975A (en) * | 2017-08-30 | 2018-02-27 | 宁波亿润汽车零部件有限公司 | A kind of ternary catalyzing unit support |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107641759B (en) | Method for producing thin-specification hot forming steel based on CSP (cast Steel plate) process | |
| CN101481778B (en) | Austenic stainless steel strip and manufacturing method thereof | |
| CN103397267A (en) | Cold roll for rolling lithium battery guard plate and manufacturing method thereof | |
| KR101494113B1 (en) | Press-molded article and method for producing same | |
| CN105441786B (en) | Tensile strength 1500MPa grades of hot press-formed use sheet metal and its CSP production methods | |
| CN101147920A (en) | Control method for surface scale of hot rolled steel plate for vanadium-containing automobile beam | |
| CN101440462B (en) | Economical long service life material for mechanical press forging die and manufacturing method thereof | |
| CN102127675A (en) | Steel plate warm formed parts with high efficiency, low energy consumption and high quality and production method thereof | |
| CN114525453A (en) | Thin-specification bridge steel and production method thereof | |
| CN102974742A (en) | Processing method of movable fork | |
| CN105420455A (en) | Annealing heat treatment technology of special cold-rolled alloy steel strip 16MnCr5 for automobile engine rocker | |
| CN115341142B (en) | Steel for warm forming and preparation method thereof | |
| CN102260828B (en) | Metallic material and method for forming same | |
| CN110157979B (en) | Rolling method for improving surface quality of steel plate | |
| CN113941599A (en) | Preparation method of high-toughness hot forming part for automobile | |
| CN100476007C (en) | CSP production process of steel for automobile crossbeam | |
| CN102989944A (en) | Forging method of expansion breaking connecting rod | |
| CN102974729A (en) | Machining method of automobile engine left plate | |
| CN103846633A (en) | Method of forging idler shaft for gearbox | |
| WO2017029773A1 (en) | Method for manufacturing hot press part and hot press part | |
| CN103589850B (en) | Manufacturing method for scale breaking tension leveler working roll | |
| CN102628146A (en) | High-nickel-chromium-alloy semi-steel roll and manufacturing method thereof | |
| CN102989982B (en) | Forging method of driving shaft for gearbox | |
| CN110923566A (en) | Three way catalyst converter support | |
| CN114525391B (en) | Production process of high-carbon tool steel cold-rolled sheet |
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 |
Application publication date: 20200327 |
|
| RJ01 | Rejection of invention patent application after publication |