CN104846173A - Heat treatment method of wear-resistant steel bottom plate for loader - Google Patents
Heat treatment method of wear-resistant steel bottom plate for loader Download PDFInfo
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- CN104846173A CN104846173A CN201510222931.0A CN201510222931A CN104846173A CN 104846173 A CN104846173 A CN 104846173A CN 201510222931 A CN201510222931 A CN 201510222931A CN 104846173 A CN104846173 A CN 104846173A
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Abstract
The invention discloses a heat treatment method of a wear-resistant steel bottom plate for a loader. The wear-resistant steel bottom plate comprises chemical components including, in weight percent, 2.2-2.5% of C, 8.5-11% of V, 5-6.5% of Cr, 2-3% of Ni, 0.8-1.1% of Mn, 0.6-0.8% of Si, less than or equal to 0.03% of P, less than or equal to 0.02% of S and the balance Fe. The heat treatment method includes the steps: (1) heating the wear-resistant steel bottom plate to reach the temperature of 895-910 DEG C, keeping the temperature for 10-15min and soaking and cooling the wear-resistant steel bottom plate in sodium chloride aqueous solution; (2) heating the wear-resistant steel bottom plate to reach the temperature of 420-430 DEG C after treatment in the step (1), keeping the temperature for 40-50min and cooling the wear-resistant steel bottom plate in air. The wear-resistant steel bottom plate treated by the method has fine hardness and toughness and excellent wear resistance.
Description
Technical field
The present invention relates to a kind of heat treating method of shovel loader wear resisting steel base plate.
Background technology
Shovel loader is one of engineering machinery main in earthwork, wearing and tearing are one of major ways causing this kind of power shovel bottom sheet to scrap, in use not only to be subject to the strong wear of the abrasive particles such as sandstone, but also the intense impact of large stone will be subject to, therefore, when select materials, need hardness and the toughness of considering material, to reduce wearing and tearing and the fracture of material.
Summary of the invention
The technical problem to be solved in the present invention overcomes existing defect, provides a kind of heat treating method of shovel loader wear resisting steel base plate.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
A kind of heat treating method of shovel loader wear resisting steel base plate, described wear resisting steel base plate is containing the chemical composition of following weight percentage: C 2.2 ~ 2.5%, V 8.5 ~ 11%, Cr 5 ~ 6.5%, Ni 2 ~ 3%, Mn 0.8 ~ 1.1%, Si 0.6 ~ 0.8%, P≤0.03%, S≤0.02%, and surplus is Fe;
Comprise the steps:
(1) wear resisting steel bottom plate heating to 895 ~ 910 DEG C, after insulation 10-15min, immerse in sodium chloride aqueous solution and cool;
(2) after step (1) process, wear resisting steel bottom plate heating to 420 ~ 430 DEG C, insulation 40 ~ 50min, cools in air.
Further, the concentration of described sodium chloride aqueous solution is 3 ~ 5wt%.
Compared with the wear resisting steel base plate of existing loading shovel, the wear resisting steel base plate after thermal treatment of the present invention can significantly improve hardness and the toughness of material, alleviates the wearing and tearing of base plate.
Embodiment
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
embodiment 1
Shovel loader wear resisting steel base plate is containing the chemical composition of following weight percentage: C 2.2%, V 9%, Cr 5%, Ni 2%, Mn 0.8%, Si 0.6%, surplus are Fe.By proportional quantity, charging, melting, obtains described wear resisting steel base plate.Phosphorus, sulphur are inevitable impurity, should control P≤0.03% in final finished, S≤0.02%.
Thermal treatment:
(1) wear resisting steel bottom plate heating to 895 DEG C, after insulation 15min, immerses in 3wt% sodium chloride aqueous solution and is cooled to less than 130 DEG C;
(2) after step (1) process, wear resisting steel bottom plate heating to 430 DEG C, insulation 50min, is cooled to room temperature in air.
The hardness of gained wear resisting steel base plate is 65HRC, and impelling strength is 45J/cm
2.
embodiment 2
Shovel loader wear resisting steel base plate is containing the chemical composition of following weight percentage: C 2.3%, V 8.5%, Cr 6%, Ni 2.5%, Mn 1.1%, Si 0.7%, surplus are Fe.By proportional quantity, charging, melting, obtains described wear resisting steel base plate.Phosphorus, sulphur are inevitable impurity, should control P≤0.03% in final finished, S≤0.02%.
Thermal treatment:
(1) wear resisting steel bottom plate heating to 900 DEG C, after insulation 12min, immerses in 3wt% sodium chloride aqueous solution and is cooled to less than 130 DEG C;
(2) after step (1) process, wear resisting steel bottom plate heating to 420 DEG C, insulation 40min, is cooled to room temperature in air.
The hardness of gained wear resisting steel base plate is 69HRC, and impelling strength is 52J/cm
2.
embodiment 3
Shovel loader wear resisting steel base plate is containing the chemical composition of following weight percentage: C 2.5%, V 11%, Cr 6.5%, Ni 3%, Mn 1%, Si 0.8%, surplus are Fe.By proportional quantity, charging, melting, obtains wear resisting steel base plate.Phosphorus, sulphur are inevitable impurity, should control P≤0.03% in final finished, S≤0.02%.
Thermal treatment:
(1) wear resisting steel bottom plate heating to 910 DEG C, after insulation 10min, immerses in 5wt% sodium chloride aqueous solution and is cooled to less than 130 DEG C;
(2) after step (1) process, wear resisting steel bottom plate heating to 425 DEG C, insulation 50min, is cooled to room temperature in air.
The hardness of gained wear resisting steel base plate is 75.6HRC, and impelling strength is 61J/cm
2.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. the shovel loader heat treating method of wear resisting steel base plate, described wear resisting steel base plate is containing the chemical composition of following weight percentage: C 2.2 ~ 2.5%, V 8.5 ~ 11%, Cr 5 ~ 6.5%, Ni 2 ~ 3%, Mn 0.8 ~ 1.1%, Si 0.6 ~ 0.8%, P≤0.03%, S≤0.02%, and surplus is Fe;
Comprise the steps:
(1) wear resisting steel bottom plate heating to 895 ~ 910 DEG C, after insulation 10-15min, immerse in sodium chloride aqueous solution and cool;
(2) after step (1) process, wear resisting steel bottom plate heating to 420 ~ 430 DEG C, insulation 40 ~ 50min, cools in air.
2. heat treating method according to claim 1, is characterized in that: the concentration of described sodium chloride aqueous solution is 3 ~ 5wt%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510222931.0A CN104846173A (en) | 2015-05-05 | 2015-05-05 | Heat treatment method of wear-resistant steel bottom plate for loader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510222931.0A CN104846173A (en) | 2015-05-05 | 2015-05-05 | Heat treatment method of wear-resistant steel bottom plate for loader |
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| CN104846173A true CN104846173A (en) | 2015-08-19 |
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| CN201510222931.0A Pending CN104846173A (en) | 2015-05-05 | 2015-05-05 | Heat treatment method of wear-resistant steel bottom plate for loader |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006322042A (en) * | 2005-05-19 | 2006-11-30 | Nachi Fujikoshi Corp | Nitrided steel with superhigh hardness and high abrasion resistance |
| CN101643825A (en) * | 2009-09-04 | 2010-02-10 | 宁国市南洋铁球有限公司 | Medium chromium multielement alloy cast ball and cast segment oil quenching heat treatment technique |
| US20100263771A1 (en) * | 2007-12-20 | 2010-10-21 | Posco | Steel wire rod for bearing steel, manufacturing method of steel wire rod for bearing steel, heat treatment method of steel bearing, steel bearing and soaking method of bearing steel |
| CN102430582A (en) * | 2011-12-29 | 2012-05-02 | 河北津西钢铁集团大方重工科技有限公司 | Roll sleeve of ultra-strong wear-resistant high alloy steel roll squeezer and manufacturing method roll sleeve |
| CN102660714A (en) * | 2012-06-05 | 2012-09-12 | 河南理工大学 | High-carbon and high-vanadium wear-resistant steel |
-
2015
- 2015-05-05 CN CN201510222931.0A patent/CN104846173A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006322042A (en) * | 2005-05-19 | 2006-11-30 | Nachi Fujikoshi Corp | Nitrided steel with superhigh hardness and high abrasion resistance |
| US20100263771A1 (en) * | 2007-12-20 | 2010-10-21 | Posco | Steel wire rod for bearing steel, manufacturing method of steel wire rod for bearing steel, heat treatment method of steel bearing, steel bearing and soaking method of bearing steel |
| CN101643825A (en) * | 2009-09-04 | 2010-02-10 | 宁国市南洋铁球有限公司 | Medium chromium multielement alloy cast ball and cast segment oil quenching heat treatment technique |
| CN102430582A (en) * | 2011-12-29 | 2012-05-02 | 河北津西钢铁集团大方重工科技有限公司 | Roll sleeve of ultra-strong wear-resistant high alloy steel roll squeezer and manufacturing method roll sleeve |
| CN102660714A (en) * | 2012-06-05 | 2012-09-12 | 河南理工大学 | High-carbon and high-vanadium wear-resistant steel |
Non-Patent Citations (2)
| Title |
|---|
| 宋小龙 等: "《新编中外金属材料手册》", 31 August 2012, 化学工业出版社 * |
| 徐自立 等: "《工程材料》", 30 June 2012, 华中科技大学出版社 * |
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Application publication date: 20150819 |