CN106544475A - A kind of thinning method of metal material surface crystal grain - Google Patents
A kind of thinning method of metal material surface crystal grain Download PDFInfo
- Publication number
- CN106544475A CN106544475A CN201610962843.9A CN201610962843A CN106544475A CN 106544475 A CN106544475 A CN 106544475A CN 201610962843 A CN201610962843 A CN 201610962843A CN 106544475 A CN106544475 A CN 106544475A
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- China
- Prior art keywords
- metal material
- material surface
- laser
- cold extrusion
- crystal grain
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
-
- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
-
- 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
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
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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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The present invention relates to a kind of thinning method of metal material surface crystal grain, cold extrusion process is carried out including to metal material surface, the metal material surface cleaned after cold extrusion is processed with gasoline, with manual spray equipment metal material surface coating laser absorption coating after cleaning, laser surface hardening is carried out to metal material surface, the step of 150～180 DEG C of lonneals are carried out to metal material after laser surface hardening.The method of the present invention can realize the refinement of piece surface interior tissue crystal grain, and the piece surface hardness of process is high, and centre hardness is low, and safety non-pollution can also greatly improve reliability and the life-span of part.
Description
Technical field
The invention belongs to metal material surface strengthening technologies field, and in particular to a kind of refinement of metal material surface crystal grain
Method.
Background technology
Rapid development of economy creates the huge market demand for industrial goods, simultaneously, to properties of product it is also proposed that
Higher and higher requirement.Find that the surface quality of product is right as internal soundness during product quality is improved constantly
The reliability and life-span important of part or product.As gear is being also easy to produce fatigue equivalent, gluing, broken teeth using process
Deng failure phenomenon, using the carrying energy that gear can be effectively improved after surface Hardening Treatment, extend its service life.
Material is improved by technologies such as surface hardening, high-frequency quenching, carburizing, nitriding, shot-peenings mainly in terms of metal material
Surface property.But, no matter adopt which kind of method all existing defects：Surface heat-treatent reinforcing is by piece surface chemical composition
Improvement with grain structure effectively increases the case hardness of part, but the center portion that part is equally improve in processing is hard
Degree, makes part that the toughness of part is significantly reduced while high surface hardness is obtained；The mechanical surface such as shot-peening reinforcement technique is only
The stress state that piece surface can be changed improves surface abrasion resistance, and reinforcing effect is limited.If improving piece surface hardness
Meanwhile, overall flexibility and surface stress are can guarantee that again, will be the changes of a matter to material wear ability and life-span.
The content of the invention
It is difficult to take into account toughness and surface abrasion resistance while piece surface hardness is improved for conventional surface reinforcement technique
Raising, the invention provides a kind of composite strengthening method of metal material surface crystal grain refinement.The present invention using cold extrusion and
The technology fining metal material surface crystal grain of laser surface hardening complex intensifying, improves the surface mechanical properties of part.
In view of the problems referred to above of prior art, according to one side disclosed by the invention, the present invention adopts following technology
Scheme：
A kind of thinning method of metal material surface crystal grain, comprises the following steps：
Step 1：Cold extrusion process is carried out to metal material surface, a large amount of positions are formed in metal material surface interior tissue
Mistake, accumulates a part of potential energy；
Step 2：The metal material surface cleaned after cold extrusion is processed with gasoline, removes surface oil；
Step 3：With manual spray equipment metal material surface coating laser absorption coating after cleaning；
Step 4：Rational laser power, scanning speed, overlapping rate are selected, laser surface is carried out to metal material surface and is quenched
Fire, as cold extrusion is provided for the recrystallization during laser surface hardening in a large amount of dislocations that metal material surface is internally formed
Nucleus, after cold extrusion, the potential energy of metal material surface accumulation provides energy for recrystallization, makes metal after laser surface hardening
Material surface forms tiny interior tissue crystal grain；
Step 5：150～180 DEG C of lonneals are carried out to metal material after laser surface hardening, metal material planted agent is reduced
Power, it is to avoid surface pressing it is excessive and cause failure.
The invention has the beneficial effects as follows：
1st, the method adopts cold extrusion+laser surface hardening surface intensified technique, can realize that piece surface interior tissue is brilliant
The refinement of grain.
2nd, the piece surface hardness using the method process is high, and centre hardness is low.Ensureing the same of part high surface hardness
When, also ensure that its good toughness.Piece surface after laser quenching and cold extrusion is conducive to improving in compressive stress state
Piece surface anti-fatigue performance and wearability.
3rd, the method safety non-pollution, can also greatly improve reliability and the life-span of part.
Specific embodiment
The present invention is described in further detail with reference to embodiment, but embodiments of the present invention not limited to this.
A kind of thinning method of metal material surface crystal grain of the present invention, comprises the following steps：
Step 1：Cold extrusion process is carried out to metal material surface, a large amount of positions are formed in metal material surface interior tissue
Mistake, accumulates a part of potential energy；
Step 2：The metal material surface cleaned after cold extrusion is processed with gasoline, removes surface oil；
Step 3：With manual spray equipment metal material surface coating laser absorption coating after cleaning；
Step 4：Rational laser power, scanning speed, overlapping rate are selected, laser surface is carried out to metal material surface and is quenched
Fire, as cold extrusion is provided for the recrystallization during laser surface hardening in a large amount of dislocations that metal material surface is internally formed
Nucleus, after cold extrusion, the potential energy of metal material surface accumulation provides energy for recrystallization, makes metal after laser surface hardening
Material surface forms tiny interior tissue crystal grain；
Step 5：150～180 DEG C of lonneals are carried out to metal material after laser surface hardening, metal material planted agent is reduced
Power, it is to avoid surface pressing it is excessive and cause failure.
The method of the metal material surface crystal grain refinement of the present invention, by cold extrusion and laser surface hardening Technology for Heating Processing group
Into.Its principle is that a large amount of dislocations are formed in piece surface interior tissue using cold extrusion such as bead first, while after extruding
Piece surface has deformation accumulate a part of potential energy.Subsequently laser surface hardening process is carried out in piece surface.Cold extrusion is zero
The a large amount of dislocations and defect that part interior surface is formed provide nucleus for the recrystallization during laser surface hardening, zero after extruding
The potential energy of part surface accumulation provides energy for recrystallization, simultaneously because in LASER HEAT input set, heat affected area is little, firing rate
Hurry up, material rate of cooling is fast, and the piece surface interior tissue crystal grain formed in the case of instant heating is rapidly cooled down is very tiny,
The overall mechanical properties of piece surface are largely increased, and the change very little to part centre hardness.Finally, in laser surface
Piece surface after quenched low-temperature tempering carries out cold extrusion process, makes piece surface be in compressive stress state.By above-mentioned process
Part both can guarantee that good overall mechanical properties, can make part that there is good wearability again.
Claims (1)
1. a kind of thinning method of metal material surface crystal grain, comprises the following steps：
Step 1：Cold extrusion process is carried out to metal material surface, a large amount of dislocations is formed in metal material surface interior tissue,
Accumulate a part of potential energy；
Step 2：The metal material surface cleaned after cold extrusion is processed with gasoline, removes surface oil；
Step 3：With manual spray equipment metal material surface coating laser absorption coating after cleaning；
Step 4：Rational laser power, scanning speed, overlapping rate are selected, laser surface hardening are carried out to metal material surface,
As cold extrusion is provided for the recrystallization during laser surface hardening in a large amount of dislocations that metal material surface is internally formed
Nucleus, after cold extrusion, the potential energy of metal material surface accumulation provides energy for recrystallization, makes metal material after laser surface hardening
Material surface forms tiny interior tissue crystal grain；
Step 5：150～180 DEG C of lonneals are carried out to metal material after laser surface hardening, metal material internal stress is reduced,
Avoid surface pressing excessive and cause failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962843.9A CN106544475A (en) | 2016-11-04 | 2016-11-04 | A kind of thinning method of metal material surface crystal grain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610962843.9A CN106544475A (en) | 2016-11-04 | 2016-11-04 | A kind of thinning method of metal material surface crystal grain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106544475A true CN106544475A (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610962843.9A Pending CN106544475A (en) | 2016-11-04 | 2016-11-04 | A kind of thinning method of metal material surface crystal grain |
Country Status (1)
| Country | Link |
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| CN (1) | CN106544475A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837365A (en) * | 2017-11-27 | 2019-06-04 | 上海交通大学 | Hot-work die and its composite modified layer and surface modifying method on surface |
| CN112195474A (en) * | 2020-10-14 | 2021-01-08 | 上海新能量纳米科技股份有限公司 | Metal surface modification process and application thereof |
| CN113832418A (en) * | 2021-09-14 | 2021-12-24 | 深圳市卡德姆科技有限公司 | Metal material toughening treatment device and treatment method thereof |
| CN114260330A (en) * | 2021-11-29 | 2022-04-01 | 中国兵器工业第五九研究所 | Accurate preparation method of ultrafine-grained tissue thin-wall conical part |
Citations (4)
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|---|---|---|---|---|
| CN1507963A (en) * | 2002-12-17 | 2004-06-30 | 张俊清 | Spline shaft processing method using cold extrusion of meidium carbon steel |
| CN101665862A (en) * | 2009-10-15 | 2010-03-10 | 武汉华工激光成套设备有限公司 | Surface laser quenching process of car panel die |
| CN105689967A (en) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | Machining method for machine tool spindle part |
| KR20160099839A (en) * | 2015-02-13 | 2016-08-23 | 한국산업기술대학교산학협력단 | Heat treatment and surface hardening methods of alloys for extrusion molds having excellent abrasion resistance |
-
2016
- 2016-11-04 CN CN201610962843.9A patent/CN106544475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1507963A (en) * | 2002-12-17 | 2004-06-30 | 张俊清 | Spline shaft processing method using cold extrusion of meidium carbon steel |
| CN101665862A (en) * | 2009-10-15 | 2010-03-10 | 武汉华工激光成套设备有限公司 | Surface laser quenching process of car panel die |
| CN105689967A (en) * | 2014-11-26 | 2016-06-22 | 重庆市巴南区永兴机械厂 | Machining method for machine tool spindle part |
| KR20160099839A (en) * | 2015-02-13 | 2016-08-23 | 한국산업기술대학교산학협력단 | Heat treatment and surface hardening methods of alloys for extrusion molds having excellent abrasion resistance |
Non-Patent Citations (1)
| Title |
|---|
| 李立军等: "影响冷冲压模具寿命的因素分析", 《模具制造》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109837365A (en) * | 2017-11-27 | 2019-06-04 | 上海交通大学 | Hot-work die and its composite modified layer and surface modifying method on surface |
| CN112195474A (en) * | 2020-10-14 | 2021-01-08 | 上海新能量纳米科技股份有限公司 | Metal surface modification process and application thereof |
| CN112195474B (en) * | 2020-10-14 | 2022-11-11 | 上海新能量纳米科技股份有限公司 | Metal surface modification process and application thereof |
| CN113832418A (en) * | 2021-09-14 | 2021-12-24 | 深圳市卡德姆科技有限公司 | Metal material toughening treatment device and treatment method thereof |
| CN114260330A (en) * | 2021-11-29 | 2022-04-01 | 中国兵器工业第五九研究所 | Accurate preparation method of ultrafine-grained tissue thin-wall conical part |
| CN114260330B (en) * | 2021-11-29 | 2023-09-12 | 中国兵器工业第五九研究所 | Accurate preparation method of superfine crystal tissue thin-wall conical part |
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