CN101185612A - Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof - Google Patents
Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof Download PDFInfo
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- CN101185612A CN101185612A CNA2006101343165A CN200610134316A CN101185612A CN 101185612 A CN101185612 A CN 101185612A CN A2006101343165 A CNA2006101343165 A CN A2006101343165A CN 200610134316 A CN200610134316 A CN 200610134316A CN 101185612 A CN101185612 A CN 101185612A
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Abstract
The invention relates to a liquid salt bath carburizing agent, a bath salt formula and a preparation method thereof. The main components and the content of the liquid salt bath carburizing agent comprises fixed carbon of not less than 85 percent, ash content of not more than 4 percent, water of not more than 8 percent and sulphate of not more than 0.05 percent. The main components and the proportion of the bath salt formula of the carburizing agent comprises NaCl of 40-50 percent, KCl of 30-40 percent, Na2CO3 of 10-20 percent, additive of carburizing agent of 5-10 percent. The preparation method of the bath salt mainly comprises the processes of subsalt smelting, temperature rising, adding the liquid carburizing agent and heating up and quenching, etc. The liquid salt bath carburizing agent of the invention is characterized by low cost and non-toxin of the carburizing agent and is applicable for metal materials of various properties; the bath salt formula of the carburizing agent has diversified material sources, low cost, simple and practicable preparation method , easy operation and is beneficial to popularizing and applying.
Description
Technical field
The present invention relates to a kind of carburizer, specifically, relate to a kind of salt bath carburizer and salt bath formula and compound method, belong to the thermo-chemical treatment technical field.
Background technology
Thermo-chemical treatment is the metal heat treatmet by chemical constituent, tissue and the performance that changes metal and alloy workpiece top layer.Thermo-chemical treatment mainly contains carburizing, nitriding and carbo-nitriding etc., wherein carburizing be the most ancient also be one of the most frequently used process.Carburizing is that a kind of infiltration by carbon or carbon and nitrogen makes austenite steel surface of the work change the process for modifying surface of chemical constituent and organizational structure.The quality of the workpiece quality of process Carburization Treatment is directly connected to the quality and the service life of engineering goods.The carburizing part surface carbon concentration is low, will reduce the fatigue strength of surface of the work; And carbon contents is too high, then easily produces the netted or massive carbide in surface, increases surface of the work fragility.In general, carburizing part top layer carbon content has surface generalization mechanical performance preferably between 0.8-1.0% the time, not only has high hardness and wearability, and heart portion can keep high toughness, the load that can withstand shocks, and fatigue strength is higher.Therefore, when carrying out the carburizing thermo-chemical treatment, control carburizing part surface carbon concentration is very crucial, and control carburizing part surface carbon concentration, can be by the controlled atmospher carbon potential, the depth of penetration of control surface of the work is realized.Because the control of workpiece depth of penetration is difficult to accurate assurance, for general technical staff, this operation all is very difficult.
In addition, wish to get the depth of penetration that meets the demands, can also wait by the carburizer selecting to be fit to and reasonable process conditions and realize.For this reason, people have carried out test of many times and further investigation, have obtained certain achievement.As the patent No. is 8910121.9 patents of invention disclosed " a kind of complex carburizers ", this carburizer is made of by a certain percentage the kerosene that dissolves each other, pure and mild rare earth element, be suitable for the drop-feeding gas carburization and the vacuum ionic carburization of pit gas carburizing furnace, be particularly suitable for the controlled atmosphere carburizing of pit carburizing furnace.Progressively development theoretical along with thermo-chemical treatment and technology is perfect, and the use of pit carburizing furnace now is fewer and feweri, is about to withdraw from historical wonderful stage.In order to satisfy the needs of modern crafts development, people are studying novel carburizer always energetically, but up to the present, also do not find a kind of carburizer that can use on the metal material of various materials.
Summary of the invention
The inventor has overcome the deficiency of above-mentioned prior art on the basis that studies intensively with test of many times, one of its purpose is to provide a kind of liquid salt bath carburizer.
Two of purpose of the present invention is to provide a kind of salt bath formula of aforesaid liquid salt bath carburizer.
Two of purpose of the present invention is to provide a kind of compound method of above-mentioned salt bath formula.
Above-mentioned purpose of the present invention is achieved through the following technical solutions.
A kind of liquid salt bath carburizer, its key component and content are: fixed carbon 〉=85%, ash≤4%, moisture≤8%, sulfate≤0.05%.
The salt bath formula that is used for above-mentioned carburizer, its key component and proportioning thereof are: sodium chloride nacl 40-50%, potassium chloride (KCl) 30-40%, sodium carbonate Na
2CO
310-20%, carburizer additive capacity 5-10%.
The compound method of above-mentioned salt bath formula is divided into following step:
(1) earlier basic salt is put into crucible fusing (wherein basic purity salt 〉=98.5%), be warming up to 900 ℃ ± 10 ℃, add the aforesaid liquid carburizer more in batches, be warming up to 930 ℃ ± 10 ℃ after finishing.
(2) oozed 10 minutes with the rod iron examination, direct quenching to hardness reaches more than the HRA79 then.If hardness is not enough, illustrate that salt bath does not reach normal carburizing state, should continue to replenish the aforesaid liquid carburizer.
(3) to often replenish above-mentioned carburizer in the carburizing process.The salt bath liquid level should replenish the basic salt for preparing in proportion when descending.The salt bath surface must keep knot to cover state.Phosphorus content should remain on about 10% in the salt bath.
Liquid salt bath carburizer provided by the present invention has characteristics with low cost, that penetration enhancer is nontoxic, is applicable to the metal material of various materials; The used salt bath formula of this carburizer source is various, and cost is lower, and compound method is simple and practical, and easy operating helps popularization and application.
The specific embodiment
A kind of liquid salt bath carburizer, its key component and content are: fixed carbon 〉=85%, ash≤4%, moisture≤8%, sulfate≤0.05%.
The salt bath formula that is used for above-mentioned carburizer, its key component and proportioning thereof are: sodium chloride nacl 40-50%, potassium chloride (KCl) 30-40%, sodium carbonate Na
2CO
310-20%, carburizer additive capacity 5-10%.
The compound method of above-mentioned salt bath formula is divided into following step:
1, earlier basic salt is put into crucible fusing (wherein basic purity salt 〉=98.5%), be warming up to 900 ℃ ± 10 ℃, add the aforesaid liquid carburizer more in batches, be warming up to 930 ℃ ± 10 ℃ after finishing.
2, oozed 10 minutes with the rod iron examination, direct quenching to hardness reaches more than the HRA79 then.If hardness is not enough, illustrate that salt bath does not reach normal carburizing state, should continue to replenish the aforesaid liquid carburizer.
3, to often replenish above-mentioned carburizer in the carburizing process.The salt bath liquid level should replenish the basic salt for preparing in proportion when descending.The salt bath surface must keep knot to cover state.Phosphorus content should remain on about 10% in the salt bath.
Claims (3)
1. liquid salt bath carburizer, its key component and content are: fixed carbon 〉=85%, ash≤4%, moisture≤8%, sulfate≤0.05%.
2. the salt bath formula that is used for above-mentioned carburizer, its key component and proportioning thereof are: sodium chloride nacl 40-50%, potassium chloride (KCl) 30-40%, sodium carbonate Na
2CO
310-20%, carburizer additive capacity 5-10%.
3. the compound method of above-mentioned salt bath formula is divided into following step:
(1) earlier basic salt is put into crucible fusing (wherein basic purity salt 〉=98.5%), be warming up to 900 ℃ ± 10 ℃, add the aforesaid liquid carburizer more in batches, be warming up to 930 ℃ ± 10 ℃ after finishing.
(2) oozed 10 minutes with the rod iron examination, direct quenching to hardness reaches more than the HRA79 then.If hardness is not enough, illustrate that salt bath does not reach normal carburizing state, should continue to replenish the aforesaid liquid carburizer.
(3) to often replenish above-mentioned carburizer in the carburizing process.The salt bath liquid level should replenish the basic salt for preparing in proportion when descending.The salt bath surface must keep knot to cover state.Phosphorus content should remain on about 10% in the salt bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101343165A CN101185612A (en) | 2006-11-16 | 2006-11-16 | Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101343165A CN101185612A (en) | 2006-11-16 | 2006-11-16 | Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof |
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| CN101185612A true CN101185612A (en) | 2008-05-28 |
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| CNA2006101343165A Pending CN101185612A (en) | 2006-11-16 | 2006-11-16 | Liquid salt bath carburizing agent and salt bath prescription and confecting method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330052A (en) * | 2011-10-20 | 2012-01-25 | 铜陵市三圆特种铸造有限责任公司 | Heat treatment process for moderate-intensity steel |
| CN102358934A (en) * | 2011-10-20 | 2012-02-22 | 铜陵市三圆特种铸造有限责任公司 | Thermal processing process for medium-strength steel |
| CN113943161A (en) * | 2021-11-25 | 2022-01-18 | 王耀民 | Ti (BCN) powder and preparation method thereof |
-
2006
- 2006-11-16 CN CNA2006101343165A patent/CN101185612A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330052A (en) * | 2011-10-20 | 2012-01-25 | 铜陵市三圆特种铸造有限责任公司 | Heat treatment process for moderate-intensity steel |
| CN102358934A (en) * | 2011-10-20 | 2012-02-22 | 铜陵市三圆特种铸造有限责任公司 | Thermal processing process for medium-strength steel |
| CN113943161A (en) * | 2021-11-25 | 2022-01-18 | 王耀民 | Ti (BCN) powder and preparation method thereof |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080528 |