CN105986088A - Heat treatment process for 1Cr17Ni2 steel - Google Patents
Heat treatment process for 1Cr17Ni2 steel Download PDFInfo
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- CN105986088A CN105986088A CN201510049324.9A CN201510049324A CN105986088A CN 105986088 A CN105986088 A CN 105986088A CN 201510049324 A CN201510049324 A CN 201510049324A CN 105986088 A CN105986088 A CN 105986088A
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Abstract
The invention discloses a heat treatment process for 1Cr17Ni2 steel. The heat treatment process is characterized by comprising the following steps: normalizing, quenching, primary tempering and secondary tempering, wherein normalizing temperature is 950 to 1, 100 DEG C, and an air cooling manner is adopted in normalizing; quenching temperature is 900 to 920 DEG C, and an oil cooling manner is employed in quenching; primary tempering temperature is 650 to 670 DEG C, and a cooling manner is oil cooling; and secondary tempering temperature is 620 to 650 DEG C, and an air cooling manner is used. According to the heat treatment process for 1Cr17Ni2 steel, normalizing allows crystal grains to be refined and carbide distribution to be uniform; brittle transition temperature is reduced; tempering brittleness is suppressed; impact toughness is increased; stress concentration and crack expansion are prevented; and toughness of the steel is greatly improved.
Description
Technical field
The invention belongs to Technology for Heating Processing field, specifically a kind of 1Cr17Ni2 steel heat treatment process.
Background technology
1Cr17Ni2 steel is a kind of broad-spectrum martensite ferrite type two phase stainless steel, owing to it has corrosion resistance best in martensitic stain less steel and the highest intensity, thus have a wide range of applications in marine machinery, compressor drum, compressor blade etc. manufacture.Existing Technology for Heating Processing flow process typically uses
: annealing, 680～700 DEG C of high tempering air coolings；Quenching, 950～1050 DEG C of oil are cold；It is tempered 275～350 DEG C of air coolings.But this steel has the temper brittleness at 475 DEG C of fragility and 550 DEG C, and chemical component fluctuation is very big to the mechanical impact of this steel, and therefore the reasonable employment of material has been played important function by 1Cr17Ni2 Heat-Treatment of Steel.
Summary of the invention
In place of it is an object of the invention to for Shortcomings in above-mentioned technology, the present invention provides a kind of new 1Cr17Ni2 steel heat treatment process, can be effectively improved the combination property of 1Cr17Ni2 steel.
The technical scheme realizing the object of the invention is as follows:
A kind of 1Cr17Ni2 steel heat treatment process, it is characterised in that its Technology for Heating Processing comprises the steps of normalizing → quenching → first time tempering → second time tempering；Described normalizing temperature is 950-1100 DEG C, and the type of cooling is air cooling；Described hardening heat is 900-920 DEG C, and the type of cooling is that oil is cold；Described first time temperature is 650-670 DEG C, and the type of cooling is that oil is cold；Described second time temperature is 620-650 DEG C, and the type of cooling is air cooling.
A kind of 1Cr17Ni2 steel heat treatment process of the present invention, normalizing makes crystal grain refinement and distribution of carbides homogenization, remove the internal stress of material, increase the hardness of material, the toughness of steel can be effectively improved by intercritical hardening, reduce fracture appearance transition tem, suppression temper brittleness, tiny heterogeneous structure is obtained after 900-920 DEG C of quenching, crystal grain is tiny makes cracks can spread effective length shorten, crackle becomes big along the resistance of little grain propagation, the interface formed in strip heterogeneous structure is bigger than the grain boundary area of normative heat treatment, raising along with temperature, notched bar impact strength increases, so prevent stress collection from neutralizing Anticrack, and increase substantially the toughness of steel.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described:
A kind of 1Cr17Ni2 steel heat treatment process, its Technology for Heating Processing comprises the steps of normalizing → quenching → first time tempering → second time tempering；Described normalizing temperature is 950-1100 DEG C, and the type of cooling is air cooling；Described hardening heat is 900-920 DEG C, and the type of cooling is that oil is cold；Described first time temperature is 650-670 DEG C, and the type of cooling is that oil is cold；Described second time temperature is 620-650 DEG C, and the type of cooling is air cooling.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.All technical staff in the art, all should be in the protection domain being defined in the patent claims the most on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (1)
1. a 1Cr17Ni2 steel heat treatment process, it is characterised in that its Technology for Heating Processing comprises the steps of normalizing → quenching → first time tempering → second time tempering；Described normalizing temperature is 950-1100 DEG C, and the type of cooling is air cooling；Described hardening heat is 900-920 DEG C, and the type of cooling is that oil is cold；Described first time temperature is 650-670 DEG C, and the type of cooling is that oil is cold；Described second time temperature is 620-650 DEG C, and the type of cooling is air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049324.9A CN105986088A (en) | 2015-01-31 | 2015-01-31 | Heat treatment process for 1Cr17Ni2 steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049324.9A CN105986088A (en) | 2015-01-31 | 2015-01-31 | Heat treatment process for 1Cr17Ni2 steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105986088A true CN105986088A (en) | 2016-10-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510049324.9A Pending CN105986088A (en) | 2015-01-31 | 2015-01-31 | Heat treatment process for 1Cr17Ni2 steel |
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| CN (1) | CN105986088A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112263A (en) * | 2018-10-18 | 2019-01-01 | 沈阳透平机械股份有限公司 | A kind of centrifugal compressor 14Cr17Ni2 steel shaft heat treatment process |
| CN109517953A (en) * | 2019-01-10 | 2019-03-26 | 无锡透平叶片有限公司 | Balance and the heat treatment method for improving 1Cr12Ni3Mo2VNbN Blade Steel impact flexibility and Rp0.02 |
| CN113444861A (en) * | 2021-07-01 | 2021-09-28 | 沈阳航天新光集团有限公司 | One-time tempering heat treatment processing technology suitable for 1Cr17Ni2 stainless steel |
-
2015
- 2015-01-31 CN CN201510049324.9A patent/CN105986088A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109112263A (en) * | 2018-10-18 | 2019-01-01 | 沈阳透平机械股份有限公司 | A kind of centrifugal compressor 14Cr17Ni2 steel shaft heat treatment process |
| CN109517953A (en) * | 2019-01-10 | 2019-03-26 | 无锡透平叶片有限公司 | Balance and the heat treatment method for improving 1Cr12Ni3Mo2VNbN Blade Steel impact flexibility and Rp0.02 |
| CN113444861A (en) * | 2021-07-01 | 2021-09-28 | 沈阳航天新光集团有限公司 | One-time tempering heat treatment processing technology suitable for 1Cr17Ni2 stainless steel |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
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| WD01 | Invention patent application deemed withdrawn after publication |