CN111926217A - High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof - Google Patents
High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof Download PDFInfo
- Publication number
- CN111926217A CN111926217A CN202010814212.9A CN202010814212A CN111926217A CN 111926217 A CN111926217 A CN 111926217A CN 202010814212 A CN202010814212 A CN 202010814212A CN 111926217 A CN111926217 A CN 111926217A
- Authority
- CN
- China
- Prior art keywords
- alloy material
- temperature
- resistant
- content
- strength
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/03—Alloys based on nickel or cobalt based on nickel
- C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
- C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
- C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/023—Alloys based on nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C30/00—Alloys containing less than 50% by weight of each constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/002—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working by rapid cooling or quenching; cooling agents used therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/10—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of nickel or cobalt or alloys based thereon
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
Abstract
The invention discloses a high-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material, which is prepared by taking nickel as a base material, molybdenum and chromium as main ingredients, tungsten, cobalt, rhenium and iron as auxiliary ingredients and manganese and vanadium as a small amount of additive materials, and is characterized in that the content of nickel in the 1200-type alloy material is more than 45 percent, the content of molybdenum is more than 12 percent, the content of chromium is more than 13 percent, the content of tungsten is more than 3 percent, the content of cobalt is more than 3 percent, the content of rhenium is more than 3 percent, the content of iron is more than 4 percent, the content of manganese is less than 2 percent and the content of vanadium is less than 4 percent. The invention also discloses a preparation method and application thereof. The 1200-type alloy material has the tensile strength of 1076MPa at room temperature and the elongation of 38 percent. At the high-temperature test temperature of 1200 ℃, the tensile strength reaches: 47.1MPa, and the elongation rate reaches 86.6 percent. And has excellent corrosion resistance in derivatives such as fluorine, hydrochloric acid, sulfuric acid, chloride, calcium chloride, etc.
Description
Technical Field
The invention relates to the field of alloy material preparation, in particular to a 1200-type alloy material with high temperature resistance, corrosion resistance and high strength, and a preparation method and application thereof.
Background
Conventional non-metallic refractory materials are for example: corundum, silicon carbide graphite and the like, compared with metal materials, have low density and are easy to break, and can only be made into bricks or containers with small volume. Under the high temperature environment, materials such as acid, alkali, salt and the like can be corroded and damaged and lose efficacy after being contacted with the materials for a long time, and the materials which are maintained and replaced can only become solid wastes, so that the resource waste is caused. The damaged metal material can satisfy the recycle of the melting furnace, but the high temperature resistant and corrosion resistant metal material on the market at present, such as: 316L, 310S, the working temperature is 950 ℃ and 1150 ℃, respectively, the working temperature can not reach 1200 ℃, and the material can not be used as a working condition material at 1200 ℃.
Therefore, a conductive material which can stably work and be repaired and replaced under the working condition of 1200 ℃ can be designed for recycling, and can be manufactured into a large-sized cylinder through welding is needed.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a 1200-type alloy material with high temperature resistance, corrosion resistance and high strength, and a preparation method and application thereof.
Unlike the prior art, the 1200-type alloy material of the present invention has strong corrosion resistance to fluorine, chlorine, sulfur, salts, etc. and derivatives thereof when heated to a high temperature of 1200 ℃, maintains high strength at a high temperature of 1200 ℃, and can be used as a material for manufacturing a rotary kiln body.
Under the conditions of high temperature and bearing corrosive materials, the high-strength bearing ring still has high strength and cannot deform when rotating and dynamically working.
The 1200-type alloy material can be recycled after remelting and reshaping according to actual needs as a precious metal material, and has high resource utilization rate and small environmental influence. A1200-type high-temp, corrosion and strength alloy is prepared from Ni as basic raw material, Mo and Cr as main raw materials, W, Co, Re and Fe as auxiliary materials, Mn and V as additive,
the 1200-type alloy material comprises more than 45% of nickel, more than 12% of molybdenum, more than 13% of chromium, more than 3% of tungsten, more than 3% of cobalt, more than 3% of rhenium, more than 4% of iron, less than 2% of manganese and less than 4% of vanadium.
In a preferred embodiment of the invention, the density of the 1200-type alloy material is more than or equal to 8.9 g/cubic centimeter; the working temperature is less than or equal to 1349 ℃ (the electric furnace continuously tests for 100 days).
In a preferred embodiment of the present invention, the type 1200 alloy material contains 45% -59% of nickel, 14% -19% of molybdenum, 13% -18% of chromium, 2% -5% of tungsten and 4% -7% of iron
A preparation method of a 1200-type alloy material with high temperature resistance, corrosion resistance and high strength comprises the following steps:
and (3) smelting the nickel, the molybdenum, the chromium, the tungsten, the cobalt, the rhenium, the iron, the manganese and the vanadium at high temperature, casting and molding, carrying out solid solution heat treatment, and then carrying out water quenching to prepare a single-phase solid solution, thus obtaining the 1200-type alloy material.
In a preferred embodiment of the present invention, the pyrometallurgical temperature range is 1650 ℃ to 1700 ℃.
In a preferred embodiment of the invention, the smelting time of the high-temperature smelting is 1-1.5 h.
In a preferred embodiment of the present invention, the temperature range of the solution heat treatment is 1160 ℃ to 1190 ℃, and the treatment time of the solution heat treatment is 4 hours.
The application of the 1200-type alloy material with high temperature resistance, corrosion resistance and high strength is independently used as a rotary kiln body material.
The invention has the beneficial effects that:
the 1200-type alloy material has tensile strength of 1076mpa and elongation of 38% at room temperature. At the high-temperature test temperature of 1200 ℃, the tensile strength reaches: 47.1mpa, elongation up to 86.6%. And has excellent corrosion resistance in derivatives such as fluorine, hydrochloric acid, sulfuric acid, chloride, calcium chloride, etc.
Detailed Description
The design principle of the invention is as follows:
the 1200-type alloy material which still has corrosion resistance and high strength at the high temperature of 1200 ℃ is prepared by using nickel as a base material, molybdenum and chromium as main ingredients, tungsten, cobalt, rhenium and iron as auxiliary materials and manganese and vanadium as a small amount of additive materials.
Can be used for manufacturing self-heating crucibles and rotary kiln bodies by electromagnetic induction technology. The method is used for calcining solid wastes such as tailings, raw ores and waste containing heavy metals by an electromagnetic induction technology, achieves the environmental protection purpose of activating, magnetizing, separating, recycling and utilizing the precious metals, and realizes the development of promoting circular economy.
The high-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material has the tensile strength of 1076mpa and the elongation of 38% at room temperature. At the high-temperature test temperature of 1200 ℃, the tensile strength reaches: 47.1mpa, elongation up to 86.6%. At the following stage: fluorine gas, hydrochloric acid, sulfuric acid, chloride, calcium chloride, and the like, have excellent corrosion resistance. The corrosion rate is less than 0.025/a, and the corrosion rate is less than 0.026mm/a at the high temperature of 600 ℃.
Example 1
The preparation method of the 1200 type alloy material is characterized in that nickel, molybdenum, chromium, tungsten, cobalt, rhenium, iron, manganese, vanadium and other metals are proportioned according to a certain proportion, the proportioned materials are fed into an electromagnetic induction smelting furnace, and the electromagnetic induction smelting furnace carries out high-temperature smelting and electromagnetic stirring. After casting and forming by a high-temperature centrifugal casting machine, carrying out solution heat treatment, and then carrying out water quenching to enable the structure to become a single-phase solid solution. The 1200 type alloy material is obtained, wherein the ingredients comprise 50% of nickel, 16% of molybdenum, 14.6% of chromium, 3.1% of tungsten, 3.1% of cobalt, 4.2% of rhenium, 4.2% of iron, 0.8% of manganese and 3% of vanadium; the temperature in the magnetic induction smelting furnace is 1650-1700 ℃, and the smelting time of the ingredients in the electromagnetic induction smelting furnace is 1-1.5 h. The temperature of the solution heat treatment is 1160-1190 ℃, and the time of the solution heat treatment is 4 hours. The type 1200 alloy material of this example is shown in Table 1
TABLE 1 physical and chemical indexes
Example 2
The preparation method of the 1200 type alloy material is characterized in that nickel, molybdenum, chromium, tungsten, cobalt, rhenium, iron, manganese, vanadium and other metals are proportioned according to a certain proportion, the proportioned materials are fed into an electromagnetic induction smelting furnace, and the electromagnetic induction smelting furnace carries out high-temperature smelting and electromagnetic stirring. After casting and forming by a high-temperature centrifugal casting machine, carrying out solution heat treatment, and then carrying out water quenching to enable the structure to become a single-phase solid solution. Thus obtaining a 1200 type alloy material, wherein the ingredients comprise 52% of nickel, 14.5% of molybdenum, 14% of chromium, 3.2% of tungsten, 3.1% of cobalt, 4.1% of rhenium, 5% of iron, 0.95% of manganese and 3.1% of vanadium; the temperature in the magnetic induction smelting furnace is 1650-1700 ℃, and the smelting time of the ingredients in the electromagnetic induction smelting furnace is 1-1.5 h. The temperature of the solution heat treatment is 1160-1190 ℃, and the time of the solution heat treatment is 4 hours. The type 1200 alloy material of this example is shown in Table 2
TABLE 2 physical and chemical indexes
Example 3
The preparation method of the 1200 type alloy material is characterized in that nickel, molybdenum, chromium, tungsten, cobalt, rhenium, iron, manganese, vanadium and other metals are proportioned according to a certain proportion, the proportioned materials are fed into an electromagnetic induction smelting furnace, and the electromagnetic induction smelting furnace carries out high-temperature smelting and electromagnetic stirring. After casting and forming by a high-temperature centrifugal casting machine, carrying out solution heat treatment, and then carrying out water quenching to enable the structure to become a single-phase solid solution. The 1200 type alloy material is obtained, wherein the ingredients comprise 49% of nickel, 17.2% of molybdenum, 16% of chromium, 4% of tungsten, 4.2% of cobalt, 4.5% of rhenium, 6% of iron, 0.99% of manganese and 3.5% of vanadium; the temperature in the electromagnetic induction smelting furnace is 1650-1700 ℃, and the smelting time of the ingredients in the magnetic induction smelting furnace is 1-1.5 h. The temperature of the solution heat treatment is 1160-1190 ℃, and the time of the solution heat treatment is 4 hours. The type 1200 alloy material of this example is shown in Table 3
TABLE 3 physical and chemical indexes
From examples 1-3, it can be seen that the high temperature resistant, corrosion resistant, high strength 1200 type alloy material of the present invention has a tensile strength of 1076mpa and an elongation of 38% at room temperature. At the high-temperature test temperature of 1200 ℃, the tensile strength reaches: 47.1mpa, elongation up to 86.6%. At the following stage: fluorine gas, hydrochloric acid, sulfuric acid, chloride, calcium chloride, and the like, have excellent corrosion resistance. The corrosion rate is less than 0.025/a at normal temperature and less than 0.026mm/a at 600 ℃.
Claims (8)
1. A1200-type high-temp, corrosion and strength alloy material is prepared from Ni as basic raw material, Mo and Cr as main raw materials, W, Co, Re and Fe as auxiliary materials, and Mn and V as additive,
the 1200-type alloy material comprises more than 45% of nickel, more than 12% of molybdenum, more than 13% of chromium, more than 3% of tungsten, more than 3% of cobalt, more than 3% of rhenium, more than 4% of iron, less than 2% of manganese and less than 4% of vanadium.
2. The high temperature, corrosion and strength 1200 alloy material of claim 1, wherein the 1200 alloy material has a density of 8.9 g/cc or more; the working temperature is less than or equal to 1349 ℃.
3. The high temperature, corrosion and strength 1200-type alloy material of claim 1, wherein the nickel content of the 1200-type alloy material is 45% -59%, the molybdenum content is 14% -19%, the chromium content is 13% -18%, the tungsten content is 2% -5%, and the iron content is 4% -7%.
4. A method for preparing a high temperature, corrosion and strength 1200 type alloy material according to any one of claims 1 to 3, comprising the steps of:
and (3) smelting the nickel, the molybdenum, the chromium, the tungsten, the cobalt, the rhenium, the iron, the manganese and the vanadium at high temperature, casting and molding, carrying out solid solution heat treatment, and then carrying out water quenching to prepare a single-phase solid solution, thus obtaining the 1200-type alloy material.
5. The method for preparing the high-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material according to claim 4, wherein the temperature range of the high-temperature smelting is 1650-1700 ℃.
6. The method for preparing the high-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material according to claim 4, wherein the smelting time of the high-temperature smelting is 1h-1.5 h.
7. The method for preparing the high temperature resistant, corrosion resistant and high strength 1200 type alloy material according to claim 4, wherein the temperature of the solution heat treatment is in the range of 1160-1190 ℃, and the treatment time of the solution heat treatment is 4 hours.
8. Use of a high temperature, corrosion resistant, high strength type 1200 alloy material according to any one of claims 1-3 as a sole material in a rotary kiln body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814212.9A CN111926217A (en) | 2020-08-13 | 2020-08-13 | High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010814212.9A CN111926217A (en) | 2020-08-13 | 2020-08-13 | High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111926217A true CN111926217A (en) | 2020-11-13 |
Family
ID=73311887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010814212.9A Pending CN111926217A (en) | 2020-08-13 | 2020-08-13 | High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111926217A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0803585A1 (en) * | 1996-04-24 | 1997-10-29 | ROLLS-ROYCE plc | Nickel alloy for turbine engine component |
| CN103498078A (en) * | 2008-06-26 | 2014-01-08 | 独立行政法人物质·材料研究机构 | Ni-based single crystal superalloy and alloy member obtained from the same |
| CN106048310A (en) * | 2016-08-11 | 2016-10-26 | 四川六合锻造股份有限公司 | Ni-Cr-Mo-W high temperature alloy material, and preparation method and application thereof |
| CN106676366A (en) * | 2017-01-16 | 2017-05-17 | 宁国市华成金研科技有限公司 | High-temperature resistance alloy |
| CN106801207A (en) * | 2017-02-13 | 2017-06-06 | 无锡宝露重工有限公司 | A kind of solution heat treatment of nickel-based high-temperature alloy forge piece |
| CN107750280A (en) * | 2015-06-24 | 2018-03-02 | 冶联科技地产有限责任公司 | Alloy melting and method of refining |
| CN108588814A (en) * | 2018-06-05 | 2018-09-28 | 西北工业大学 | The preparation method of Ni-based 028 single crystal alloy of iron under solid-state |
| CN109136654A (en) * | 2017-06-19 | 2019-01-04 | 中国科学院金属研究所 | A kind of low rhenium corrosion and heat resistant long-life high intensity second generation nickel-base high-temperature single crystal alloy and its heat treatment process |
| CN110640353A (en) * | 2019-11-14 | 2020-01-03 | 攀钢集团江油长城特殊钢有限公司 | Welding wire material and preparation method thereof |
| CN110724826A (en) * | 2019-04-16 | 2020-01-24 | 敬业钢铁有限公司 | Electroslag remelting process for nickel-based superalloy |
| CN110923512A (en) * | 2019-12-04 | 2020-03-27 | 上海旷彩环保科技发展有限公司 | High-temperature corrosion resistant alloy core, production process and electromagnetic heating rotary kiln |
-
2020
- 2020-08-13 CN CN202010814212.9A patent/CN111926217A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0803585A1 (en) * | 1996-04-24 | 1997-10-29 | ROLLS-ROYCE plc | Nickel alloy for turbine engine component |
| CN103498078A (en) * | 2008-06-26 | 2014-01-08 | 独立行政法人物质·材料研究机构 | Ni-based single crystal superalloy and alloy member obtained from the same |
| CN107750280A (en) * | 2015-06-24 | 2018-03-02 | 冶联科技地产有限责任公司 | Alloy melting and method of refining |
| CN106048310A (en) * | 2016-08-11 | 2016-10-26 | 四川六合锻造股份有限公司 | Ni-Cr-Mo-W high temperature alloy material, and preparation method and application thereof |
| CN106676366A (en) * | 2017-01-16 | 2017-05-17 | 宁国市华成金研科技有限公司 | High-temperature resistance alloy |
| CN106801207A (en) * | 2017-02-13 | 2017-06-06 | 无锡宝露重工有限公司 | A kind of solution heat treatment of nickel-based high-temperature alloy forge piece |
| CN109136654A (en) * | 2017-06-19 | 2019-01-04 | 中国科学院金属研究所 | A kind of low rhenium corrosion and heat resistant long-life high intensity second generation nickel-base high-temperature single crystal alloy and its heat treatment process |
| CN108588814A (en) * | 2018-06-05 | 2018-09-28 | 西北工业大学 | The preparation method of Ni-based 028 single crystal alloy of iron under solid-state |
| CN110724826A (en) * | 2019-04-16 | 2020-01-24 | 敬业钢铁有限公司 | Electroslag remelting process for nickel-based superalloy |
| CN110640353A (en) * | 2019-11-14 | 2020-01-03 | 攀钢集团江油长城特殊钢有限公司 | Welding wire material and preparation method thereof |
| CN110923512A (en) * | 2019-12-04 | 2020-03-27 | 上海旷彩环保科技发展有限公司 | High-temperature corrosion resistant alloy core, production process and electromagnetic heating rotary kiln |
Non-Patent Citations (4)
| Title |
|---|
| ASTM: "镍基合金", 《高温下具有高强度的铁、钴、和镍基合金铸件标准的规定ASTMA567-66》 * |
| 宗学文: "《光固化3D打印复杂零件快速铸造技术》", 31 January 2019, 华中科技大学出版社 * |
| 约翰 杜邦: "《镍基合金焊接冶金和焊接性》", 31 May 2014, 上海科学技术文献出版社 * |
| 骆莉等: "《工程材料及机械制造基础》", 29 February 2012, 华中科技大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104532097B (en) | High-strength high corrosion-resistant nickel-base high temperature alloy and solid-solution and aging heat treatment method thereof | |
| CN106282702A (en) | A kind of automotive casting high-quality aluminum alloy material | |
| CN101913037A (en) | Super diphase stainless steel welding material and production method thereof | |
| CN111500897A (en) | High-strength oxidation-resistant corrosion-resistant nickel-chromium electrothermal alloy and processing method thereof | |
| CN109477155A (en) | Manufacture have the manganese of required content, nickel, molybdenum ferrochrome method | |
| CN106755963A (en) | A kind of method of dilval in high efficiente callback stainless steel sludge | |
| CN111926217A (en) | High-temperature-resistant, corrosion-resistant and high-strength 1200-type alloy material and preparation method and application thereof | |
| CN101368232B (en) | Method for recycling valuable metal from cobalt-copper-iron alloy | |
| Kim et al. | Influence of temperature on reaction mechanism of ilmenite ore smelting for titanium production | |
| CN105567973A (en) | Method for preparing ferro-nickel alloy and ferrotungsten-molybdenum alloy from waste material containing tungsten, molybdenum and nickel | |
| CN109609776A (en) | A method of copper cobalt in copper vessel slag is extracted using waste cathode of aluminum electrolytic cell carbon block | |
| CN108385014A (en) | A kind of preparation method of ferrochrome | |
| CN107287496A (en) | High tough spheroidal graphite cast-iron and its manufacturing process based on austenitic matrix | |
| Sihotang et al. | The effect of smelting time and composition of palm kernel shell charcoal reductant toward extractive Pomalaa nickel laterite ore in mini electric arc furnace | |
| CN109913743B (en) | Method for preparing ferromolybdenum from molybdenum carbide and iron oxide | |
| Soare et al. | Innovative approach for the valorization of useful metals from waste electric and electronic equipment (WEEE) | |
| CN104141047B (en) | A kind of recycling processing method of molybdenum iron slag | |
| CN111705272A (en) | Low-cost high-performance ferritic stainless steel for corrosion-resistant pump valve and preparation method thereof | |
| CN105063504A (en) | Low-Ni high-temperature steel material | |
| Sivasakthi et al. | Cobalt recovery from waste catalysts (petroleum refining industry from Gujarat) | |
| VASILESCU et al. | Chromite. Processing and Applications | |
| Laungsakulthai et al. | Smelting reduction of spent catalyst containing nickel: a preliminary study | |
| Baroch et al. | Applications of Powder Metallurgy Molybdenum in the 1990 s | |
| Thanjekwayo | The influence of Ru additions on the corrosion behaviour of WC-Co cemented carbide in corrosive media | |
| CN106435357A (en) | Alloy steel |
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: 20201113 |
|
| RJ01 | Rejection of invention patent application after publication |