CN108118346B - High tenacity gold article fabrication methods - Google Patents
High tenacity gold article fabrication methods Download PDFInfo
- Publication number
- CN108118346B CN108118346B CN201711433637.XA CN201711433637A CN108118346B CN 108118346 B CN108118346 B CN 108118346B CN 201711433637 A CN201711433637 A CN 201711433637A CN 108118346 B CN108118346 B CN 108118346B
- Authority
- CN
- China
- Prior art keywords
- gold
- acid solution
- semi
- finished product
- bracelet
- 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.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/10—Other heavy metals
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Adornments (AREA)
Abstract
The invention discloses high tenacity gold article fabrication methods.The high tenacity gold article fabrication methods include the following steps: the second acid solution containing nitrate ion and gold bracelet semi-finished product that the first acid solution containing sulfate ion that offer concentration is 95%-99%, concentration are 95%-99%；First acid solution is mixed with second acid solution with volume ratio 8.5-9:1-1.5, pickling solution is formed；The pickling solution is heated up to 70 DEG C -90 DEG C, gold bracelet semi-finished product are placed in the pickling solution and soak 2-5s, are then taken out；The gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, are then taken out；The gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, obtain gold bracelet.High tenacity gold article fabrication methods of the present invention, can be improved gold jewellery toughness, gold jewellery are prevented to be cracked, and extend gold jewellery service life.
Description
Technical field
The present invention relates to gold manufacture technology fields, and in particular to high tenacity gold article fabrication methods.
Background technique
Gold as beautiful golden yellow non-ferrous metal, have it is rare it is valuable, density is big, hardness is low, good ductility and can
Oxidation, and pure gold face do not occur at any temperature with oxygen for the characteristics of plasticity and quite high chemical stability
For color in golden yellow, gloss is bright but very soft, therefore, is usually used in making jewellery.More importantly in Chinese mind, gold
Exactly worship and rich and honour symbol, and the characteristics of gold exclusive cultural connotation and value preserving and appreciation, so that everybody goes after like a flock of ducks.
The method that gold bracelet molding in the prior art mostly uses manual processing greatly had also been introduced some machinery in recent years and had been added
Construction equipment.But either manual processing is still machined, and after wearing long-time, mostly tortoise not enough can occur due to toughness
It splits, affects the normal wearing of jewellery.
Summary of the invention
Based on this, the present invention, which provides one kind, can be improved gold jewellery toughness, the high tenacity gold product production side for preventing it to be cracked
Method.
In order to achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of high tenacity gold article fabrication methods, include the following steps:
There is provided the first acid solution containing sulfate ion, concentration that concentration is 95%-99% is containing for 95%-99%
The second acid solution and gold bracelet semi-finished product of nitrate ion；
First acid solution is mixed with second acid solution with volume ratio 8.5-9:1-1.5, acid is formed
Dilution；
The pickling solution is heated up to 70 DEG C -90 DEG C, gold bracelet semi-finished product are placed in the pickling solution and soak 2-
5s then takes out；
The gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, are then taken out；
The gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, obtain gold bracelet.
Above-mentioned high tenacity gold article fabrication methods, by the gold bracelet semi-finished product tentatively to complete be placed in sulfate radical with
In the pickling solution that nitrate anion is made into, after mixing pickling, test finds that the toughness of golden product greatly improves, and finds cracking
Probability substantially reduces, and extends the service life of gold ornaments.
Wherein in an embodiment, first acid solution is sulfuric acid solution.Sulfuric acid solution can provide purer sulfate radical from
Son, the pickling solution concentration being made into are more accurate.
Wherein in an embodiment, the concentration of the sulfuric acid solution is 98%.
Wherein in an embodiment, second acid solution is nitric acid solution.Nitric acid solution can provide purer nitrate anion from
Son, the pickling solution concentration being made into are more accurate.
Wherein in an embodiment, the concentration of the nitric acid solution is 98%.
Wherein in an embodiment, the volume ratio of first acid solution and second acid solution is 8.5:1.
Wherein in an embodiment, the pickling solution is heated up to 75 DEG C -85 DEG C.
Wherein in an embodiment, the gold bracelet semi-finished product are placed in 40 DEG C of water and are washed.
Wherein in an embodiment, the gold bracelet semi-finished product are dried in 50 DEG C of environment.
The present invention there is a need to provide another high tenacity gold article fabrication methods, include the following steps:
There is provided nitric acid solution that sulfuric acid solution, concentration that concentration is 95%-99% are 95%-99% and gold bracelet half at
Product；
The sulfuric acid solution is mixed with the nitric acid solution with volume ratio 8.5-9:1-1.5, it is molten to form pickling
Liquid；
The pickling solution is heated up to 75 DEG C -85 DEG C, gold bracelet semi-finished product are placed in the pickling solution and soak 2-
5s then takes out；
The gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, are then taken out；
The gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment；
The gold bracelet semi-finished product are again placed in the pickling solution and soak 2-5s, are then taken out, such recurring number
Secondary, last gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, obtain gold bracelet.
Specific embodiment
It to facilitate the understanding of the present invention, below will be to invention is more fully described.But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes
It is more thorough and comprehensive to the understanding of the disclosure.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term as used herein in the specification of the present invention is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.
The present invention provides a kind of high tenacity gold article fabrication methods, for processing golden product, especially gold jewelry for example
Gold bracelet improves the toughness of gold ornaments, prevents to be cracked, and extends the service life of jewellery.
Wherein in an embodiment, gold bracelet semi-finished product be gold bracelet half after being processed early period at the present invention one compared with
The high tenacity gold article fabrication methods of good embodiment, include the following steps.
One, providing the first acid solution containing sulfate ion, concentration that concentration is 95%-99% is 95%-99%'s
The second acid solution containing nitrate ion and gold bracelet semi-finished product.
Two, the first acid solution is mixed with the second acid solution with volume ratio 8.5-9:1-1.5, it is molten forms pickling
Liquid；
Three, pickling solution is heated up to 70 DEG C -90 DEG C, gold bracelet semi-finished product is placed in pickling solution and soak 2-5s, so
After take out；
Four, gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, then taken out；
Five, gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, obtains gold bracelet.
Product.For example, it may be using gold block through tabletting, volume ring, treated this finished product such as trombone slide.Tabletting therein is
Refer to and gold is first pressed into sheet, the size of needs can also be cut into.Volume ring, which refers to, is rolled into ring-shaped for the gold piece of sheet, with
It is handled convenient for the later period.Trombone slide, which refers to, pulls into hollow annular for cricoid gold, forms the shape of the jewellery of needs.
It is to be appreciated that in other embodiments, if the not instead of bracelet of processing, the jewelry of other shapes, such as
Animals shaped gold bullion then will carry out die casting by mold and be formed, also be semi-finished product.
First acid solution is sulfuric acid solution, and sulfuric acid solution can provide purer sulfate ion, and the pickling solution being made into is dense
It spends more accurate.Sulfate relative to others containing sulfate radical, the pickling solution purity being made into is higher, is more conducive to acid
Wash journey.
Similarly, the second acid solution is nitric acid solution, and nitric acid solution can provide purer nitrate ion, and the pickling being made into is molten
Liquid concentration is more accurate.Nitrate relative to others containing nitrate anion, the pickling solution purity being made into is higher, advantageously
In acid cleaning process.
Wherein in an embodiment, the concentration of sulfuric acid solution is 98%, and the concentration of nitric acid solution is 98%.What the concentration was made into
The golden product toughness of pickling solution, wash-off is higher.
Wherein in an embodiment, the first acid solution is mixed with the second acid solution with volume ratio 8.5-9:1-1.5, example
Such as with the mixing of 8.5:1,8.5:1.5,9:1,9:1.5 equal proportion.Optionally, the volume of the first acid solution and second acid solution
Than for 8.5:1.The golden product toughness of the pickling solution that the ratio is made into, wash-off is higher.
Wherein in an embodiment, pickling solution is heated up to such as 70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C.Optionally, pickling
Solution is heated up to 75 DEG C -85 DEG C, such as can be 75 DEG C, 80 DEG C, 85 DEG C.
Wherein in an embodiment, gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, for example, be placed in 30 DEG C,
35 DEG C, 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C, wash in 60 DEG C of water.Optionally, gold bracelet semi-finished product are placed in 40 DEG C of water and carry out
Washing.
Wherein in an embodiment, gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, for example, be placed in 40 DEG C, 45 DEG C,
50 DEG C, 55 DEG C, dry in 60 DEG C of environment.Optionally, gold bracelet semi-finished product are dried in 50 DEG C of environment.
Another embodiment provides high tenacity gold article fabrication methods, and obtained golden product toughness is obtained higher than above scheme
The golden product arrived, the high tenacity gold article fabrication methods include the following steps:
One, provide concentration be 95%-99% sulfuric acid solution, concentration be 95%-99% nitric acid solution and gold bracelet
Semi-finished product.
Two, sulfuric acid solution and nitric acid solution are mixed with volume ratio 8.5-9:1-1.5, forms pickling solution；
Three, pickling solution is heated up to 75 DEG C -85 DEG C, gold bracelet semi-finished product is placed in the pickling solution and soak 2-
5s then takes out；
Four, gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, then taken out；
Five, gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment；
Six, gold bracelet semi-finished product are again placed in pickling solution and soak 2-5s, then taken out, so recycled for several times, most
Gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment afterwards, obtain gold bracelet.
Above-mentioned high tenacity gold article fabrication methods, by the gold bracelet semi-finished product tentatively to complete be placed in sulfate radical with
In the pickling solution that nitrate anion is made into, after mixing pickling, test finds that the toughness of golden product greatly improves, and finds cracking
Probability substantially reduces, and extends the service life of gold ornaments.
Embodiment one
The golden article fabrication methods of the present embodiment include the following steps: that providing sulfuric acid solution, concentration that concentration is 98% is
98% nitric acid solution and gold bracelet semi-finished product；Sulfuric acid solution and nitric acid solution are mixed with volume ratio 8.5:1, shape
At pickling solution；Pickling solution is heated up to 80 DEG C, gold bracelet semi-finished product are placed in pickling solution and soak 3s, are then taken out；
Gold bracelet semi-finished product are placed in 45 DEG C of water and are washed, are then taken out.Gold bracelet semi-finished product are dried in 50 DEG C of environment
It is dry, gold bracelet semi-finished product are again placed in pickling solution and soak 3s, are then taken out, are so recycled twice, last gold bracelet
Semi-finished product are dried in 50 DEG C of environment, obtain gold bracelet.
Embodiment two
The golden article fabrication methods of the present embodiment include the following steps: that providing sulfuric acid solution, concentration that concentration is 98% is
98% nitric acid solution and gold bracelet semi-finished product；Sulfuric acid solution and nitric acid solution are mixed with volume ratio 8.5:1, shape
At pickling solution；Pickling solution is heated up to 80 DEG C, gold bracelet semi-finished product are placed in pickling solution and soak 3s, are then taken out；
Gold bracelet semi-finished product are placed in 45 DEG C of water and are washed, are then taken out.Gold bracelet semi-finished product are dried in 50 DEG C of environment
It is dry, obtain gold bracelet.
Embodiment three
The golden article fabrication methods of the present embodiment include the following steps: to provide metabisulfite solution, the concentration that concentration is 98%
For 98% sodium nitrate solution and gold bracelet semi-finished product；Metabisulfite solution is mixed with sodium nitrate solution with volume ratio 8.5:1
Together, pickling solution is formed；Pickling solution is heated up to 80 DEG C, gold bracelet semi-finished product are placed in pickling solution and soak 3s,
It then takes out；Gold bracelet semi-finished product are placed in 45 DEG C of water and are washed, are then taken out.By gold bracelet semi-finished product at 50 DEG C
It is dried in environment, obtains gold bracelet.
Example IV
The golden article fabrication methods of the present embodiment include the following steps: that providing sulfuric acid solution, concentration that concentration is 95% is
95% nitric acid solution and gold bracelet semi-finished product；Sulfuric acid solution and nitric acid solution are mixed with volume ratio 9:1, formed
Pickling solution；Pickling solution is heated up to 80 DEG C, gold bracelet semi-finished product are placed in pickling solution and soak 3s, are then taken out；It will
Gold bracelet semi-finished product are placed in 45 DEG C of water and are washed, and then take out.Gold bracelet semi-finished product are dried in 50 DEG C of environment,
Obtain gold bracelet.
Comparative example one
The golden article fabrication methods of the present embodiment are to mix 98% sulfuric acid with the volume ratio of 8.5:1 with water, form acid
The gold bracelet semi-finished product completed the process are soaked 3s in the pickling solution for being heated up to 80 DEG C, are subsequently placed in 45 DEG C by dilution
It is washed in water, is then dried, obtain gold bracelet finished product.
Comparative example two
The golden article fabrication methods of the present embodiment are to mix 98% nitric acid with the volume ratio of 8.5:1 with water, form acid
The gold bracelet semi-finished product completed the process are soaked 3s in the pickling solution for being heated up to 80 DEG C, are subsequently placed in 45 DEG C by dilution
It is washed in water, is then dried, obtain gold bracelet finished product.
Comparative example three
The golden article fabrication methods of the present embodiment are that the gold bracelet semi-finished product that will be completed the process are placed in 80 DEG C of water and carry out
Washing, is subsequently placed in 45 DEG C of water and is washed, then dry, obtain gold bracelet finished product.
The toughness of above several embodiments and comparative example will be tested below, data are shown in Table one.
The toughness of above-mentioned golden product is tested using following methods:
Cricoid gold bracelet is subjected to deformation process, the case where which includes bending etc., observe its reinstatement.
Table one
| It restores to the original state the time | |
| Embodiment one | 2min |
| Embodiment two | 3min |
| Embodiment three | 4min |
| Example IV | 3.5min |
| Comparative example one | 10min |
| Comparative example two | 10min |
| Comparative example three | 20min or longer |
As can be seen from Table I, golden article fabrication methods of the present invention, it is compared with the existing technology, restorable
Better performances are demonstrate,proved its toughness and are higher by compared with the existing technology very much, cracking can be better protected from during routine use,
It prolongs its service life.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (8)
1. a kind of high tenacity gold article fabrication methods, which comprises the steps of:
There is provided concentration be 95%-99% the first acid solution containing sulfate ion, concentration be 95%-99% containing nitrate anion from
The second acid solution and gold bracelet semi-finished product of son；First acid solution is sulfuric acid solution, and second acid solution is nitric acid
Solution;
First acid solution is mixed with second acid solution with volume ratio 8.5-9:1-1.5, it is molten to form pickling
Liquid；
The pickling solution is heated up to 70 DEG C -90 DEG C, gold bracelet semi-finished product are placed in the pickling solution and soak 2-5s, so
After take out；
The gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, are then taken out；
The gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment, obtain gold bracelet.
2. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: the concentration of the sulfuric acid solution is
98%。
3. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: the concentration of the nitric acid solution is
98%。
4. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: first acid solution with it is described
The volume ratio of second acid solution is 8.5:1.
5. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: the pickling solution is heated up to 75
℃-85℃。
6. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: the gold bracelet semi-finished product are set
It is washed in 40 DEG C of water.
7. high tenacity gold article fabrication methods according to claim 1, it is characterised in that: the gold bracelet semi-finished product exist
It is dried in 50 DEG C of environment.
8. a kind of high tenacity gold article fabrication methods, which comprises the steps of:
There is provided concentration be 95%-99% sulfuric acid solution, concentration be 95%-99% nitric acid solution and gold bracelet semi-finished product；
The sulfuric acid solution is mixed with the nitric acid solution with volume ratio 8.5-9:1-1.5, pickling solution is formed；
The pickling solution is heated up to 75 DEG C -85 DEG C, gold bracelet semi-finished product are placed in the pickling solution and soak 2-5s, so
After take out；
The gold bracelet semi-finished product are placed in 30 DEG C of -60 DEG C of water and are washed, are then taken out；
The gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment；
The gold bracelet semi-finished product are again placed in the pickling solution and soak 2-5s, are then taken out, are so recycled for several times, most
Gold bracelet semi-finished product are dried in 40 DEG C of -60 DEG C of environment afterwards, obtain gold bracelet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433637.XA CN108118346B (en) | 2017-12-26 | 2017-12-26 | High tenacity gold article fabrication methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711433637.XA CN108118346B (en) | 2017-12-26 | 2017-12-26 | High tenacity gold article fabrication methods |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108118346A CN108118346A (en) | 2018-06-05 |
| CN108118346B true CN108118346B (en) | 2019-11-12 |
Family
ID=62231876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711433637.XA Active CN108118346B (en) | 2017-12-26 | 2017-12-26 | High tenacity gold article fabrication methods |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108118346B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114457340A (en) * | 2022-01-25 | 2022-05-10 | 深圳市金安盛首饰有限公司 | Cleaning agent for removing impurities on surface of gold ornament and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560676A (en) * | 2009-04-24 | 2009-10-21 | 武汉金凰珠宝股份有限公司 | Method for electroforming hard gold product |
| CN102660748A (en) * | 2012-05-03 | 2012-09-12 | 莆田市金伯爵珠宝首饰有限公司 | Processing process for gold products |
| CN105193018A (en) * | 2015-09-10 | 2015-12-30 | 深圳市金百泰珠宝实业有限公司 | Manufacturing process of gold bracelet and gold bracelet |
| CN106108297A (en) * | 2016-07-28 | 2016-11-16 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ reverse mould class gold jewelries |
| CN106213705A (en) * | 2016-07-28 | 2016-12-14 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ chain class gold jewelries |
| CN106213706A (en) * | 2016-07-28 | 2016-12-14 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ oil pressure class gold jewelries |
-
2017
- 2017-12-26 CN CN201711433637.XA patent/CN108118346B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101560676A (en) * | 2009-04-24 | 2009-10-21 | 武汉金凰珠宝股份有限公司 | Method for electroforming hard gold product |
| CN102660748A (en) * | 2012-05-03 | 2012-09-12 | 莆田市金伯爵珠宝首饰有限公司 | Processing process for gold products |
| CN105193018A (en) * | 2015-09-10 | 2015-12-30 | 深圳市金百泰珠宝实业有限公司 | Manufacturing process of gold bracelet and gold bracelet |
| CN106108297A (en) * | 2016-07-28 | 2016-11-16 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ reverse mould class gold jewelries |
| CN106213705A (en) * | 2016-07-28 | 2016-12-14 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ chain class gold jewelries |
| CN106213706A (en) * | 2016-07-28 | 2016-12-14 | 山东招金金银精炼有限公司 | A kind of purity is the processing technique of 999.99 ‰ oil pressure class gold jewelries |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108118346A (en) | 2018-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108118346B (en) | High tenacity gold article fabrication methods | |
| CN106544494A (en) | A kind of online soft annealing method suitable for 1Cr17Ni2 rustless steel cold pull wires | |
| CN108994544A (en) | A kind of production technology of high-strength fastening bolt | |
| JPS5620136A (en) | Copper alloy member | |
| CN117165809A (en) | Titanium copper alloy pipe and preparation method thereof | |
| CN109022700B (en) | Heat treatment method of high-nitrogen high-corrosion-resistance plastic die steel | |
| CN111304483B (en) | Pure gold and preparation method and application thereof | |
| CN109778108A (en) | A kind of Fe-Ni-Cr system high temperature alloy nitriding method | |
| CN105420645B (en) | The forging and stamping handling process of aluminium | |
| GB912524A (en) | Improved high strength steels and method for producing same | |
| CN101591792A (en) | Nickel-free electroplating technology | |
| CN108588300A (en) | A kind of production method of improved breathable environment-protective leather | |
| CN105648742B (en) | A kind of human hair substitute and preparation method thereof | |
| CN106893835A (en) | A kind of Technology for Heating Processing of rocking arm | |
| CN106757059A (en) | A kind of Technology for Heating Processing of rocking arm | |
| CN107675105A (en) | A kind of stainless steel with superplastic ability | |
| CN102115976B (en) | Wig nursing and setting agent, preparation process thereof and method for wig arrangement | |
| US20220195610A1 (en) | Martensitic stainless steel pipe and method of manufacturing the same | |
| CN106312453A (en) | Method for processing fastening part | |
| US498214A (en) | Process of tawing skins | |
| Rani et al. | The History of Hinduism and Islam in Indonesia: A Review on Western Perspective | |
| CN105925932A (en) | Micro-carbonitriding process for 1215-free-cutting-steel fastener | |
| AT101009B (en) | Process for the production of fermentation citric acid. | |
| CN112575129A (en) | Environment-friendly rabbit fur leather integrated manufacturing method | |
| CN112239824A (en) | High-nickel lead-containing free-cutting material and grain structure densification production process thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |