CN1176227C - Heat treatment method of raising the hardness of structural alloy steel - Google Patents
Heat treatment method of raising the hardness of structural alloy steel Download PDFInfo
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- CN1176227C CN1176227C CNB001107690A CN00110769A CN1176227C CN 1176227 C CN1176227 C CN 1176227C CN B001107690 A CNB001107690 A CN B001107690A CN 00110769 A CN00110769 A CN 00110769A CN 1176227 C CN1176227 C CN 1176227C
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- hardness
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- steel part
- room temperature
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 229910000851 Alloy steel Inorganic materials 0.000 title claims description 6
- 238000010438 heat treatment Methods 0.000 title abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 22
- 239000010959 steel Substances 0.000 claims abstract description 22
- 238000005496 tempering Methods 0.000 claims abstract description 6
- 238000010791 quenching Methods 0.000 claims abstract description 5
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 238000007669 thermal treatment Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 239000003607 modifier Substances 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 229910000746 Structural steel Inorganic materials 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 239000000126 substance Substances 0.000 description 2
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- 235000019628 coolness Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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Abstract
The present invention relates to a heat treatment method for improving the hardness of alloy structural steel. In the method, all pretreatment are done before steel parts are tempered. The present invention is characterized in that the pretreated steel parts are thermally tempered under unidirectional close-to-static high-voltage, and the pressure range is from 1.5 to 6.0 GPa; the steel parts are heated under the high-voltage to normal quenching temperature, thermally insulated in normal time, and then, quenched to room temperature in water; subsequently, the steel parts are heated under the high-voltage to normal tempering temperature, thermally insulated in normal time, and then, cooled to room temperature in air. The present invention can greatly improve the hardness of alloy structural steel parts.
Description
The present invention relates to the heat treating regime of metallic substance, a kind of heat treating method that improves hardness of structural alloy steel is provided especially.
Heat Treatment Of Steel is to utilize the solid-state phase changes that steel takes place in the high-temperature zone and the microstructure that changes steel, thereby reaches the high-temperature process of the mechanical property that changes steel.Quenching and tempering is a kind of heat treating method commonly used, and it is made up of quenching and two kinds of processing modes of tempering, can obtain tempered martensite (low-temperaturetempering) or tempered sorbite tissue (high tempering), and purpose is to make steel obtain the better strength and toughness level.For making steel obtain the better properties level, on the basis of conventional heat treating method, people have also been developed many special thermal treatment process.As thermo-chemical treatment: workpiece is heat-treated in specific chemical environment, to form special surface-treated layer, reaches corrosion-resistant, anti abrasive purpose.Machinery thermal treatment: in heat treatment process, workpiece is applied viscous deformation (tens external force to the hundreds of NPa order of magnitude) simultaneously,, further improve the purpose of intensity to reach the microstructure of improving steel.Thermomagnetic treatment: in heat treatment process, workpiece is applied simultaneously the magnetic field of certain intensity,, further improve the purpose of intensity to reach the microstructure of improving steel.
The object of the present invention is to provide a kind of heat treating method that improves hardness of structural alloy steel, it can improve the hardness of alloy structure steel part significantly.
The invention provides a kind of heat treating method that improves hardness of structural alloy steel, at first steel part performed all pre-treatment before the modifier treatment, it is characterized in that:
Carry out modified thermal treatment through pretreated steel part under unidirectional nearly quiet high pressure, pressure range is 1.5～6.0GPa, and promptly steel part is heated to the normal quenching temperature under above-mentioned high pressure, and by insulation normal time, shrend is to room temperature then; Steel part is heated to the normalized tempering temperature subsequently under above-mentioned high pressure, by insulation normal time, air cooling is to room temperature then.
Hardness through the heat treated alloy structure steel part of above-mentioned ultra-high voltage can increase substantially.Below by embodiment in detail the present invention is described in detail.
Accompanying drawing 1 is the relation curve of pressure and hardness
Embodiment
1, material: 30CrMo
2, thermal treatment process: 870 ℃ of (pressurization)/air coolings
3, performance is seen accompanying drawing and following table
Pressure is to the influence of hardness in the ultra-high voltage thermal treatment
| Pressure (Gpa) | 0 | 2.8 | 3.8 | 4.8 | 5.8 |
| Hv100 | 330 | 413 | 442 | 471 | 485 |
Claims (1)
1, a kind of heat treating method that improves hardness of structural alloy steel at first performs all pre-treatment before the modifier treatment to steel part, it is characterized in that:
Carry out modified thermal treatment through pretreated steel part under unidirectional nearly quiet high pressure, pressure range is 1.5～6.0GPa, and promptly steel part is heated to the normal quenching temperature under above-mentioned high pressure, and by insulation normal time, shrend is to room temperature then; Steel part is heated to the normalized tempering temperature subsequently under above-mentioned high pressure, by insulation normal time, air cooling is to room temperature then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001107690A CN1176227C (en) | 2000-08-09 | 2000-08-09 | Heat treatment method of raising the hardness of structural alloy steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001107690A CN1176227C (en) | 2000-08-09 | 2000-08-09 | Heat treatment method of raising the hardness of structural alloy steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1337473A CN1337473A (en) | 2002-02-27 |
| CN1176227C true CN1176227C (en) | 2004-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001107690A Expired - Fee Related CN1176227C (en) | 2000-08-09 | 2000-08-09 | Heat treatment method of raising the hardness of structural alloy steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1176227C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337453A (en) * | 2011-07-19 | 2012-02-01 | 燕山大学 | Method for improving plastic deformation resistance of low-carbon structural steel |
| RU2506320C1 (en) * | 2012-06-20 | 2014-02-10 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Балтийский государственный технический университет "ВОЕНМЕХ" им. Д.Ф. Устинова (БГТУ "ВОЕНМЕХ") | Heat treatment method of structural steels for high-strength state |
| CN103014303A (en) * | 2012-12-13 | 2013-04-03 | 内蒙古北方重工业集团有限公司 | Production method of thin and long thin-plate type part |
| CN107435093A (en) * | 2016-05-27 | 2017-12-05 | 燕山大学 | The super intensified method of constrained transition and the technique strengthened based on this method to pure iron or mild steel |
-
2000
- 2000-08-09 CN CNB001107690A patent/CN1176227C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1337473A (en) | 2002-02-27 |
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