CN105483567A - High carbon high hardness bainite steel - Google Patents
High carbon high hardness bainite steel Download PDFInfo
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- CN105483567A CN105483567A CN201510449119.1A CN201510449119A CN105483567A CN 105483567 A CN105483567 A CN 105483567A CN 201510449119 A CN201510449119 A CN 201510449119A CN 105483567 A CN105483567 A CN 105483567A
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Abstract
Abstract So far the most popular materials for planting point /blade are Ni-Cr-Mo low alloy steel such as AISI 8630, and alloy white iron such as AS2027/Cr27. Ni-Cr-Mo low alloy steel has good toughness which can be used for soils with gravels, but the hardness (HB 460-520) of this steel is not very high to get long service life. By the way, Mo price in recent years rocketed up to unbelievably high level, making this steel a little bit too expensive for quantity use. Cr27 is hard (HB 550-700) but brittle, not recommended for soil with gravels. Besides, Hi Cr content, about 27%, make this casting iron quite expensive. A high carbon content high hardness Bainite steel (HB 590-670) with reasonable toughness, without expensive Mo nor large quantity of alloy elements, is designed for planting point/blade.
Description
Technical field
The invention belongs to bainitic steel technical field, specifically, relate to a kind of high-carbon high rigidity bainitic steel and thermal treatment process thereof.
Background technology
Up to now, nearly all plough point, blades is all adopt this kind of Ni-Cr-Mo low alloy steel of such as AISI8630, or the such Property of High Alloy White Cast Iron of AS2027/Cr27 is made.
Ni-Cr-Mo low alloy steel has good toughness, and this steel grade can be used for blades, or is containing the plough point used in the soil of rock, but the hardness of this kind of steel lower (HB460-520), and antiwear property is poor, and work-ing life is short.In addition, nickel, chromium, molybdenum price spikes, particularly molybdenum in recent years, price rises suddenly and sharply as rocket, and result makes the price of this kind of steel soar all the way, and cost of material becomes too high for the product that the sharp blades of plough is such.
Cr27 hardness high (HB550-700), but toughness is poor, is not suitable for the soil of rock during for ploughing point.In addition, also make product price height to the unaffordable stage of peasant because of chromium substantial appreciation of prices up to the chromium content of 27%.
Summary of the invention
The present invention, in view of problems of the prior art, devises a kind of high-carbon being applied to plough point and blades, high rigidity (HB590-650), good toughness, expensive molybdenum is not had in composition, and little chromium, the very simple low price high-performance abrasion-proof farm implements steel of thermal treatment process.
For realizing above-mentioned purpose of the present invention, the present invention adopts following technical scheme.
High-carbon high rigidity bainitic steel of the present invention has following composition: C0.60-0.90, SiO0.90-3.00, Mn1.20-3.50, Cr0.80-3.10, V0.10-0.30, S≤0.40, P≤0.40, Fe surplus.
The thermal treatment process of high-carbon high rigidity bainitic steel.
(1) harden: be heated to 850-980 ° of C, every 25 millimeters of cross sections are incubated one hour, and air cooling is to room temperature.
(2) tempering: be heated to 120-350 ° of C, every 25 millimeters of cross sections are incubated 2 hours.
(3) in tempering stove, air must pump circulation.Air cooling is to room temperature.
The mechanical property of high-carbon high rigidity bainitic steel.
| Hardness hardness | HB 590-650 |
| Toughness (Charpy v-notched) as casted standard v v notch v notched-value | >10 J |
Compared with prior art beneficial effect of the present invention.
1, use alloying element less, without expensive alloying elements, thus can greatly reduce costs and price.
2, thermal treatment process is simple, puts naturally cooling in atmosphere and can harden and reach high rigidity, reduce production cost further after heating.
3, there is the durometer level identical with Cr27.
4, better toughness is had compared with Cr27.For foundry goods, v v notch v impact value ensures to be greater than 10 joules.
This material short run is used for agriculture in Australia scene, and actual farming exceedes and has a surplus January, onsite application result shows, high-carbon high rigidity bainitic steel is except can replacing this high rigidity of Cr27 and have the plough point material of most high tenacity in antifriction cast iron, also very desirable at the effect of the very high blades of toughness reguirements.Cr27 is because toughness deficiency can not be used for blades, and traditionally for the chromium nickel-molybdenum alloy cast steel hardness of blades and wear resistance all very poor, high-carbon high rigidity low-alloy bainite steel has high rigidity and the high-wearing feature of Cr27 cast iron concurrently, have simultaneously and there is enough toughness, use high-carbon high rigidity bainitic steel greatly can improve the performance of blades, and cost ratio chromium Ni-Mo alloy steel is lower.
Claims (2)
1. high-carbon high rigidity bainitic steel, is characterized in that: the present invention includes following composition: C0.60-0.90, SiO0.90-3.00, Mn1.20-3.50, Cr0.80-3.10, V0.10-0.30, S≤0.40, P≤0.40, Fe.
2. the thermal treatment process of high-carbon high rigidity bainitic steel, is characterized in that:
(1) harden: be heated to 850-980, every 25 millimeters of cross sections are incubated one hour, and air cooling is to room temperature;
(2) tempering: be heated to 120-350, every 25 millimeters of cross sections are incubated 2 hours;
(3) the necessary pump circulation of air in tempering stove, air cooling is to room temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2014100863A AU2014100863A4 (en) | 2014-07-31 | 2014-07-31 | High carbon content high hardness Bainite Steel |
| AU2014100863 | 2014-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105483567A true CN105483567A (en) | 2016-04-13 |
Family
ID=51402232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510449119.1A Pending CN105483567A (en) | 2014-07-31 | 2015-07-28 | High carbon high hardness bainite steel |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105483567A (en) |
| AU (1) | AU2014100863A4 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085261A (en) * | 1993-08-21 | 1994-04-13 | 冶金工业部钢铁研究总院 | A kind of wear-resistant low-alloy steel |
| CN1256323A (en) * | 1998-12-07 | 2000-06-14 | 清华大学 | High-strength and high-toughness weldable air-cooled Hongkang bainite steel specially for railway frog |
| JP2000282177A (en) * | 1999-04-02 | 2000-10-10 | Kobe Steel Ltd | Steel for piston ring |
| CN1357645A (en) * | 2000-12-14 | 2002-07-10 | 杨继玉 | Alloy reinforced cast steel ball |
| CN1710134A (en) * | 2005-07-06 | 2005-12-21 | 燕山大学 | Super bainite abrasion-resistant steel and its manuafcturing process |
| CN101469390A (en) * | 2007-12-25 | 2009-07-01 | 张莹 | Wear resistant steel cast and method for manufacturing the same |
| CN101618448A (en) * | 2009-07-30 | 2010-01-06 | 襄樊市新兴发钢丸有限公司 | Process for producing chromium alloy cast steel shots |
-
2014
- 2014-07-31 AU AU2014100863A patent/AU2014100863A4/en not_active Expired
-
2015
- 2015-07-28 CN CN201510449119.1A patent/CN105483567A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085261A (en) * | 1993-08-21 | 1994-04-13 | 冶金工业部钢铁研究总院 | A kind of wear-resistant low-alloy steel |
| CN1256323A (en) * | 1998-12-07 | 2000-06-14 | 清华大学 | High-strength and high-toughness weldable air-cooled Hongkang bainite steel specially for railway frog |
| JP2000282177A (en) * | 1999-04-02 | 2000-10-10 | Kobe Steel Ltd | Steel for piston ring |
| CN1357645A (en) * | 2000-12-14 | 2002-07-10 | 杨继玉 | Alloy reinforced cast steel ball |
| CN1710134A (en) * | 2005-07-06 | 2005-12-21 | 燕山大学 | Super bainite abrasion-resistant steel and its manuafcturing process |
| CN101469390A (en) * | 2007-12-25 | 2009-07-01 | 张莹 | Wear resistant steel cast and method for manufacturing the same |
| CN101618448A (en) * | 2009-07-30 | 2010-01-06 | 襄樊市新兴发钢丸有限公司 | Process for producing chromium alloy cast steel shots |
Non-Patent Citations (3)
| Title |
|---|
| 张金山等: "新型高耐磨性贝氏体铸钢的研究", 《材料科学与工艺》 * |
| 曾正明等: "《实用金属材料选用手册》", 30 June 2012, 机械工业出版社 * |
| 李凤照等: "中高碳贝氏体钢的组织和耐磨性", 《钢铁》 * |
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| Publication number | Publication date |
|---|---|
| AU2014100863A4 (en) | 2014-08-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |