CN107541652A - White cast-iron and Technology for Heating Processing with break resistance - Google Patents
White cast-iron and Technology for Heating Processing with break resistance Download PDFInfo
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- CN107541652A CN107541652A CN201610475867.1A CN201610475867A CN107541652A CN 107541652 A CN107541652 A CN 107541652A CN 201610475867 A CN201610475867 A CN 201610475867A CN 107541652 A CN107541652 A CN 107541652A
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Abstract
White cast-iron and Technology for Heating Processing with break resistance, belong to iron-carbon alloy technical field, and the chemical composition based on weight/mass percentage composition is as follows：C 2.0~2.8%, Si 0.6~0.9%, Cr 6.0~7.0%, Mn 0.2~0.38%, Ni 3.6~4.2%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.Instant component is novel, manufacturing process is rationally clear, by quenching and being tempered twice, and quenching and temperature are determined by experiment, are handled at this temperature, increase substantially the toughness and wearability of nickel hard white iron, cast iron is not likely to produce crackle in use, improve service life, the hardness after as cast condition heat treatment reaches 53HRC, and the process time of heat treatment is greatlyd save, improve production efficiency.
Description
Technical field
The invention belongs to iron-carbon alloy technical field, is related to a kind of white cast-iron, more particularly to a kind of white cast-iron and Technology for Heating Processing with break resistance.
Background technology
For carbon with cast iron existing for carburizing volume morphing, its section is canescence.It is a kind of good anti-friction material, is worked under the conditions of abrasive wear.White cast-iron includes ordinary white cast iron, low-alloy chilled cast iron, middle alloy white cast iron, Property of High Alloy White Cast Iron.
The good white cast-iron of wear resistence has just been made early in the The Spring and Autumn Period in ordinary white cast iron China, as some abrasion resistant parts.This cast iron has the characteristics of high-carbon low silicon, there is higher hardness, but very crisp, suitable for the small part of manufacture shock loading, is commonly used in ploughshare, grinding, guide plate etc..Improve its performance frequently with heat-treating methods in production, expand its application.Carbon serves most important for the anti-wear performance of ordinary white cast iron, and phosphorus content is higher, then the cementite formed the more, forms substantial amounts of ledeburite, thus hardness is higher, and wearability is also just better.But phosphorus content is high, toughness then declines.
The content of the invention
There is the deficiencies of toughness is low, impact resistance is small, resistance to fracture is poor in use for ordinary white cast iron in the present invention, it is proposed white cast-iron and Technology for Heating Processing with break resistance, the component of its white cast-iron is more reasonable, working life is longer, manufacture is more easy, the mechanical property of white cast-iron can be greatly promoted, the use demands such as thump can be met.
The technical scheme is that：White cast-iron with break resistance, it is characterised in that：Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.0~2.8%, Si 0.6~0.9%, Cr 6.0~7.0%, Mn 0.2~0.38%, Ni 3.6~4.2%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
The Technology for Heating Processing of white cast-iron with break resistance, it is characterised in that comprise the following steps：
(1) quench：The nickel hard white iron is placed in continuous heat-treating drier, is heated to 1100 DEG C, 50min is incubated, is then air-cooled to room temperature；
(2) high tempering：Nickel hard white iron after being quenched in step (1) is heated to 750 DEG C, tempering insulation 45min, is then air-cooled to room temperature；
(3) secondary quenching：Nickel hard white iron after step (2) processing is heated to 1200 DEG C, 30min is incubated, is then air-cooled to room temperature；
(4) it is tempered：Nickel hard white iron after step (3) processing is heated to 320 DEG C, tempering insulation 3.5h, 80 DEG C is then cooled to the furnace and comes out of the stove.
Beneficial effects of the present invention are：White cast-iron and Technology for Heating Processing proposed by the present invention with break resistance, component is novel, and manufacturing process is rationally clear, by quenching and being tempered twice, and it is determined by experiment quenching and temperature, handled at this temperature, increase substantially the toughness and wearability of nickel hard white iron, cast iron is not likely to produce crackle in use, improve service life, hardness after as cast condition heat treatment reaches 53HRC, and greatlys save the process time of heat treatment, improves production efficiency.
Embodiment
The invention will be further described below：
White cast-iron with break resistance, it is characterised in that：Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.0~2.8%, Si 0.6~0.9%, Cr 6.0~7.0%, Mn 0.2~0.38%, Ni 3.6~4.2%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
The Technology for Heating Processing of white cast-iron with break resistance, comprises the following steps：
(1) quench：The nickel hard white iron is placed in continuous heat-treating drier, is heated to 1100 DEG C, 50min is incubated, is then air-cooled to room temperature；
(2) high tempering：Nickel hard white iron after being quenched in step (1) is heated to 750 DEG C, tempering insulation 45min, is then air-cooled to room temperature；
(3) secondary quenching：Nickel hard white iron after step (2) processing is heated to 1200 DEG C, 30min is incubated, is then air-cooled to room temperature；
(4) it is tempered：Nickel hard white iron after step (3) processing is heated to 320 DEG C, tempering insulation 3.5h, 80 DEG C is then cooled to the furnace and comes out of the stove.
Embodiment 1：
Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.0%, Si 0.6%, Cr 6.0%, Mn 0.2%, Ni 3.6%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
Embodiment 2：
Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.8%, Si 0.9%, Cr 7.0%, Mn 0.38%, Ni 4.2%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
Embodiment 3：
Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.5%, Si 0.8%, Cr 6.5%, Mn 0.3%, Ni 3.9%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
White cast-iron and Technology for Heating Processing proposed by the present invention with break resistance, component is novel, and manufacturing process is rationally clear, by quenching and being tempered twice, and it is determined by experiment quenching and temperature, handled at this temperature, increase substantially the toughness and wearability of nickel hard white iron, cast iron is not likely to produce crackle in use, improve service life, hardness after as cast condition heat treatment reaches 53HRC, and greatlys save the process time of heat treatment, improves production efficiency.
Claims (2)
1. the white cast-iron with break resistance, it is characterised in that：Chemical composition of the white cast-iron based on weight/mass percentage composition is as follows：C 2.0~2.8%, Si 0.6~0.9%, Cr 6.0~7.0%, Mn 0.2~0.38%, Ni 3.6~4.2%, Mo≤0.98%, P≤0.045%, S≤0.06%, Fe surpluses.
2. the Technology for Heating Processing of the white cast-iron with break resistance as claimed in claim 1, it is characterised in that comprise the following steps：
(1) quench：The nickel hard white iron is placed in continuous heat-treating drier, is heated to 1100 DEG C, 50min is incubated, is then air-cooled to room temperature；
(2) high tempering：Nickel hard white iron after being quenched in step (1) is heated to 750 DEG C, tempering insulation 45min, is then air-cooled to room temperature；
(3) secondary quenching：Nickel hard white iron after step (2) processing is heated to 1200 DEG C, 30min is incubated, is then air-cooled to room temperature；
(4) it is tempered：Nickel hard white iron after step (3) processing is heated to 320 DEG C, tempering insulation 3.5h, 80 DEG C is then cooled to the furnace and comes out of the stove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610475867.1A CN107541652A (en) | 2016-06-27 | 2016-06-27 | White cast-iron and Technology for Heating Processing with break resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610475867.1A CN107541652A (en) | 2016-06-27 | 2016-06-27 | White cast-iron and Technology for Heating Processing with break resistance |
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| CN107541652A true CN107541652A (en) | 2018-01-05 |
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| CN201610475867.1A Pending CN107541652A (en) | 2016-06-27 | 2016-06-27 | White cast-iron and Technology for Heating Processing with break resistance |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115002A1 (en) * | 2022-12-02 | 2024-06-06 | Federal Mogul Friedberg Gmbh, A Tenneco Group Company | Wearing element for a soil-working tool, main body for a soil-working tool, and soil-working tool |
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2016
- 2016-06-27 CN CN201610475867.1A patent/CN107541652A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024115002A1 (en) * | 2022-12-02 | 2024-06-06 | Federal Mogul Friedberg Gmbh, A Tenneco Group Company | Wearing element for a soil-working tool, main body for a soil-working tool, and soil-working tool |
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Application publication date: 20180105 |