CN107400765A - The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank - Google Patents
The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank Download PDFInfo
- Publication number
- CN107400765A CN107400765A CN201710551744.6A CN201710551744A CN107400765A CN 107400765 A CN107400765 A CN 107400765A CN 201710551744 A CN201710551744 A CN 201710551744A CN 107400765 A CN107400765 A CN 107400765A
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- China
- Prior art keywords
- palm
- metallic inclusion
- blank
- roller bits
- high temperature
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Classifications
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- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/22—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for drills; for milling cutters; for machine cutting tools
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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)
- Forging (AREA)
Abstract
The invention discloses a kind of non-metallic inclusion high temperature of palm of roller bits blank to be passivated Technology for Heating Processing, it is passivated the edge wedge angle of non-metallic inclusion in palm of roller bits matrix material, the destruction at non-metallic inclusion tip will be reduced, the stress concentration at non-metallic inclusion in palm of roller bits matrix material is eliminated, solves influence of the non-metallic inclusion to rock bit special-purpose steel fatigue behaviour.
Description
Technical field
The invention belongs to the manufacturing technology of Prospects for mining equipment development, particularly with regard to the nonmetallic of palm of roller bits blank
Field trash high temperature is passivated Technology for Heating Processing.
Background technology
It is known, the non-metallic inclusion total amount in rock bit special-purpose steel how is reduced, smelting is mostly important process.
Completed once smelting, the non-metallic inclusion total amount in rock bit special-purpose steel also just determines substantially.How by follow-up
Technique manufacturing process, it is very important to reduce influence of the non-metallic inclusion in rock bit special-purpose steel to performance.
The bit leg for the rock bit manufacturing firm that China's digging uses, gear wheel Technology for Heating Processing are mainly：Forging blank machine
Processing-carburizing-machining-quenching-tempering-machining；The research on follow-up technique, which is concentrated mainly on, at present oozes
In terms of carbon, quenching, the flow of tempering, and temperature and hardening media, the technique for not machining the stage to forging blank also is ground
Study carefully, to reduce the harm of non-metallic inclusion, improve durability.
The form of the special nonmetallic inclusionsin steel of rock bit and distribution are varied, there is sheet, banding and irregular
Other shapes, and have independent point-like, intensive point-like, cellular and ribbon distribution continuously or intermittently, or even have bulk
Exogenous non-metallic inclusion is remained in the matrix of rock bit special-purpose steel, and the harm with angular non-metallic inclusion is more
Greatly.
The influence very little of independent point-like and the fine particle non-metallic inclusion of dispersed distribution to rock bit special-purpose steel, it
The change of distribution density relation relation as shown in Figure 2 is influenceed on the mechanical performance of rock bit special-purpose steel.Rock bit is special
Higher with the distribution density of nonmetallic inclusionsin steel, then the combination property of rock bit special-purpose steel is poorer, and performance indications are lower.
The content of the invention
The invention aims to change the wedge angle of the special nonmetallic inclusionsin steel of rock bit, eliminate because point
Stress concentration caused by angle, solve influence of the non-metallic inclusion to rock bit special-purpose steel fatigue behaviour, there is provided a kind of
The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank.
The technical scheme is that：A kind of non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank,
In forging blank machining-carburizing-machining-quenching-tempering-mach procedure, it is characterised in that in forging hair
After base machining, comprise the following steps：
Step 1, palm of roller bits blank is small using 920 DEG C to 930 DEG C insulation 6-12 in box heat treatment furnace after forging shaping
When soak；
Step 2, cool down in atmosphere.
Further, palm of roller bits blank is incubated in box heat treatment furnace using 920 DEG C to 930 DEG C after forging shaping
The soak technique of 6 hours.
The beneficial effects of the invention are as follows：A kind of non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank,
The edge wedge angle of non-metallic inclusion in palm of roller bits matrix material is passivated, the destruction for reducing non-metallic inclusion tip is made
With eliminating the stress concentration at non-metallic inclusion in palm of roller bits matrix material, solve non-metallic inclusion to rotary drill
The influence of head special-purpose steel fatigue behaviour.
Brief description of the drawings
Fig. 1 is the process chart of invention；
Fig. 2 is the graph of a relation of the distribution of metallicity and nonmetal inclusion.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Such as Fig. 1, a kind of non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank, add in forging blank machine
In work-carburizing-machining-quenching-tempering-mach procedure, after being machined after forging blank forging molding, including
Following steps：
Step 1, will forge shaping after palm of roller bits blank in box heat treatment furnace using 920 DEG C to 930 DEG C be incubated 6 hours or
It is longer（Determined with specific reference to the non-metallic inclusion property detected）Soak；
Step 2, cool down in atmosphere.
Further, palm of roller bits blank is incubated in box heat treatment furnace using 920 DEG C to 930 DEG C after forging shaping
6 hours or longer（Determined with specific reference to the non-metallic inclusion property detected）Soak technique.
A kind of non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank, is passivated palm of roller bits matrix material
The edge wedge angle of middle non-metallic inclusion, the destruction at non-metallic inclusion tip will be reduced, eliminate palm of roller bits matrix material
Stress concentration in material at non-metallic inclusion, solve shadow of the non-metallic inclusion to rock bit special-purpose steel fatigue behaviour
Ring.
Non-metallic inclusion high temperature, which is passivated Technology for Heating Processing, also has reference to make the non-metallic inclusion contained by other steel
With.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above, for this area skill
For art personnel, it is clear that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing substantially from the present invention spirit or
In the case of essential characteristic, the present invention can be realized in other specific forms.Which point therefore, no matter from the point of view of, all should incite somebody to action
Embodiment regards exemplary as, and be it is nonrestrictive, the scope of the present invention by appended claims rather than on state
Bright restriction, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included in the present invention
It is interior.Any reference in claim should not be considered as to the involved claim of limitation.
Moreover, it will be appreciated that although the present specification is described in terms of embodiments, not each embodiment is only wrapped
Containing an independent technical scheme, this narrating mode of specification is only that those skilled in the art should for clarity
Using specification as an entirety, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
It is appreciated that other embodiment.
Claims (2)
- A kind of 1. non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank, in forging blank machining-carburizing- In machining-quenching-tempering-mach procedure, it is characterised in that after forging blank forging molding, including it is as follows Step：Step 1, palm of roller bits blank is small using 920 DEG C to 930 DEG C insulation 6-12 in box heat treatment furnace after forging shaping When soak；Step 2, cool down in atmosphere.
- 2. a kind of non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank according to claim 1, will Palm of roller bits blank uses 920 DEG C to the 930 DEG C soak works for being incubated 6 hours in box heat treatment furnace after forging shaping Skill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551744.6A CN107400765A (en) | 2017-07-07 | 2017-07-07 | The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710551744.6A CN107400765A (en) | 2017-07-07 | 2017-07-07 | The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107400765A true CN107400765A (en) | 2017-11-28 |
Family
ID=60405252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710551744.6A Pending CN107400765A (en) | 2017-07-07 | 2017-07-07 | The non-metallic inclusion high temperature passivation Technology for Heating Processing of palm of roller bits blank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107400765A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156352A (en) * | 1991-11-29 | 1993-06-22 | Nippon Steel Corp | Method for controlling composition of nonmetallic inclusion in steel |
| CN101805823A (en) * | 2010-03-26 | 2010-08-18 | 湖北鸣利来冶金机械科技有限公司 | Heat treatment process for mining cone bit friction pair |
| CN102494106A (en) * | 2011-12-26 | 2012-06-13 | 重庆清平机械厂 | Process for manufacturing 20 CrMo carburizing steel gear |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
| CN104070328A (en) * | 2014-06-26 | 2014-10-01 | 无锡市崇安区科技创业服务中心 | Mining roller bit steel-tooth cone manufacturing process |
| CN104195311A (en) * | 2014-09-03 | 2014-12-10 | 湖北鸣利来冶金机械科技有限公司 | Heat treatment process for rollers of roller bits |
| CN104278134A (en) * | 2013-07-12 | 2015-01-14 | 无锡成博科技发展有限公司 | Normalizing thermal treatment process of 20Cr2Ni4 |
| CN106337106A (en) * | 2016-10-10 | 2017-01-18 | 燕山大学 | Elimination method for sic inclusions in high-silicon steel |
-
2017
- 2017-07-07 CN CN201710551744.6A patent/CN107400765A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05156352A (en) * | 1991-11-29 | 1993-06-22 | Nippon Steel Corp | Method for controlling composition of nonmetallic inclusion in steel |
| CN101805823A (en) * | 2010-03-26 | 2010-08-18 | 湖北鸣利来冶金机械科技有限公司 | Heat treatment process for mining cone bit friction pair |
| CN102494106A (en) * | 2011-12-26 | 2012-06-13 | 重庆清平机械厂 | Process for manufacturing 20 CrMo carburizing steel gear |
| CN102837165A (en) * | 2012-09-27 | 2012-12-26 | 常熟天地煤机装备有限公司 | Manufacturing method for final-stage driving gear of high-power coal mining machine |
| CN104278134A (en) * | 2013-07-12 | 2015-01-14 | 无锡成博科技发展有限公司 | Normalizing thermal treatment process of 20Cr2Ni4 |
| CN104070328A (en) * | 2014-06-26 | 2014-10-01 | 无锡市崇安区科技创业服务中心 | Mining roller bit steel-tooth cone manufacturing process |
| CN104195311A (en) * | 2014-09-03 | 2014-12-10 | 湖北鸣利来冶金机械科技有限公司 | Heat treatment process for rollers of roller bits |
| CN106337106A (en) * | 2016-10-10 | 2017-01-18 | 燕山大学 | Elimination method for sic inclusions in high-silicon steel |
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Application publication date: 20171128 |