CN106755844A - The Technology for Heating Processing of rich chromium cast iron - Google Patents
The Technology for Heating Processing of rich chromium cast iron Download PDFInfo
- Publication number
- CN106755844A CN106755844A CN201510801466.6A CN201510801466A CN106755844A CN 106755844 A CN106755844 A CN 106755844A CN 201510801466 A CN201510801466 A CN 201510801466A CN 106755844 A CN106755844 A CN 106755844A
- Authority
- CN
- China
- Prior art keywords
- cast iron
- technology
- heating processing
- workpiece
- rich chromium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Heat Treatments In General, Especially Conveying And Cooling (AREA)
Abstract
The invention discloses a kind of Technology for Heating Processing of rich chromium cast iron, comprise the following steps：A, annealing；B, Quenching Treatment；C, carry out temper.A kind of Technology for Heating Processing of rich chromium cast iron of the present invention, heat treatment is the necessary means for obtaining qualified network cast iron high, therefore the rational Technology for Heating Processing of formulation seems particularly significant.
Description
Technical field
The present invention relates to a kind of Technology for Heating Processing of rich chromium cast iron.
Background technology
Heat treatment is a method for improvement metal material quality, can change by heat treatment or influence cast iron
Tissue and property, while can also obtain intensity higher, hardness and wearability etc..But original chromium casting high
Iron heat treatment can not meet technological requirement, reach and obtain intensity higher, hardness and wearability.
The content of the invention
It is an object of the invention to provide a kind of Technology for Heating Processing of rich chromium cast iron.
The technical scheme that is used to achieve the above object of the present invention is：A kind of heat treatment work of rich chromium cast iron
Skill, comprises the following steps：
A, annealing, need to process workpiece and review lower loading heat-treatment furnace, be then to slowly warm up to stove
400 DEG C or so carry out insulation l-2h, and furnace temperature then is risen into 600 DEG C carries out insulation 1-2h again, afterwards with not
More than the temperature rise speed of 150 DEG C/h, furnace temperature is quickly ramped up to after 950 DEG C carry out the insulation of 2~3h, and
Stop heating afterwards；
B, Quenching Treatment, by the workpiece room temperature shove charge after machining, with the temperature rise speed less than 80 DEG C/h
Furnace temperature is risen to 600 DEG C, furnace temperature is risen to by hardening heat with the temperature rise speed no more than 150 DEG C/h afterwards
It is incubated after 950-980 DEG C, soaking time is 2-4h, workpiece quick tapping is then carried out into air cooling；
C, carry out temper.
Temper is by workpiece shove charge under room temperature state in the step C, then is warming up to 230-260 DEG C,
Insulation 3-6h, air cooling of coming out of the stove afterwards.
A kind of Technology for Heating Processing of rich chromium cast iron of the present invention, heat treatment is the necessary hand for obtaining qualified network cast iron high
Section, therefore the rational Technology for Heating Processing of formulation seems particularly significant.
Specific embodiment
The Technology for Heating Processing of rich chromium cast iron, comprises the following steps：
A, annealing, need to process workpiece and review lower loading heat-treatment furnace, be then to slowly warm up to stove
400 DEG C or so carry out insulation l-2h, and furnace temperature then is risen into 600 DEG C carries out insulation 1-2h again, afterwards with not
More than the temperature rise speed of 150 DEG C/h, furnace temperature is quickly ramped up to after 950 DEG C carry out the insulation of 2~3h, and
Stop heating afterwards；
B, Quenching Treatment, by the workpiece room temperature shove charge after machining, with the temperature rise speed less than 80 DEG C/h
Furnace temperature is risen to 600 DEG C, furnace temperature is risen to by hardening heat with the temperature rise speed no more than 150 DEG C/h afterwards
It is incubated after 950-980 DEG C, soaking time is 2-4h, workpiece quick tapping is then carried out into air cooling；
C, carry out temper.
It is to reduce residual stress of casting and fragility, and keeps what its match was obtained, high rigidity and wearability, together
When martensite is tempered, and retained austenite has been reduced, and the workpiece after quenching should be carried out again
230-260 DEG C of temper, concrete technology is, by workpiece shove charge under room temperature state, then to be warming up to
230-260 DEG C, it is incubated 3-6h, air cooling of coming out of the stove afterwards, a kind of Technology for Heating Processing of rich chromium cast iron of the invention, heat
Treatment is the necessary means for obtaining qualified network cast iron high, therefore the rational Technology for Heating Processing of formulation seems very heavy
Will.
Claims (2)
1. a kind of Technology for Heating Processing of rich chromium cast iron, it is characterised in that：Comprise the following steps：
A, annealing, need to process workpiece and review lower loading heat-treatment furnace, then be to slowly warm up to 400 with stove
DEG C or so carry out insulation l-2h, furnace temperature then is risen into 600 DEG C carries out insulation 1-2h again, afterwards being no more than
The temperature rise speed of 150 DEG C/h, furnace temperature is quickly ramped up to after 950 DEG C carry out the insulation of 2~3h, is then stopped
Heating；B, Quenching Treatment, by the workpiece room temperature shove charge after machining, with the temperature rise speed less than 80 DEG C/h
Furnace temperature is risen to 600 DEG C by degree, and furnace temperature is risen into hardening heat with the temperature rise speed no more than 150 DEG C/h afterwards
It is incubated after 950-980 DEG C, soaking time is 2-4h, workpiece quick tapping is then carried out into air cooling；C、
Carry out temper.
2. the Technology for Heating Processing of a kind of rich chromium cast iron according to claim 1, it is characterised in that：The step
Temper is by workpiece shove charge under room temperature state in C, then is warming up to 230-260 DEG C, is incubated 3-6h, it
After come out of the stove air cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801466.6A CN106755844A (en) | 2015-11-19 | 2015-11-19 | The Technology for Heating Processing of rich chromium cast iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510801466.6A CN106755844A (en) | 2015-11-19 | 2015-11-19 | The Technology for Heating Processing of rich chromium cast iron |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106755844A true CN106755844A (en) | 2017-05-31 |
Family
ID=58916713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510801466.6A Pending CN106755844A (en) | 2015-11-19 | 2015-11-19 | The Technology for Heating Processing of rich chromium cast iron |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106755844A (en) |
-
2015
- 2015-11-19 CN CN201510801466.6A patent/CN106755844A/en active Pending
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170531 |