CN106272096B - A kind of low-carbon steel part carburizing rear surface intensifying method - Google Patents
A kind of low-carbon steel part carburizing rear surface intensifying method Download PDFInfo
- Publication number
- CN106272096B CN106272096B CN201610919429.XA CN201610919429A CN106272096B CN 106272096 B CN106272096 B CN 106272096B CN 201610919429 A CN201610919429 A CN 201610919429A CN 106272096 B CN106272096 B CN 106272096B
- Authority
- CN
- China
- Prior art keywords
- nozzle
- abrasive
- flow
- steel
- compound abrasive
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
- B24C1/10—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for compacting surfaces, e.g. shot-peening
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C5/00—Devices or accessories for generating abrasive blasts
- B24C5/02—Blast guns, e.g. for generating high velocity abrasive fluid jets for cutting materials
- B24C5/04—Nozzles therefor
Abstract
The invention discloses a kind of low-carbon steel part carburizing rear surface intensifying methods, this method carries out intensive treatment by the way of existing ultra-high pressure numerical control water jet to the mild steel piece surface crossed by Carburization Treatment, the negative pressure that i.e. compound abrasive is generated by dead weight and high-velocity flow, make compound abrasive enter in mixing tube to mix with water, compound abrasive is ejected into piece surface together with flow after the acceleration of flow from nozzle at high speeds.Steel ball ball hardness is high in course of injection, it is strong to workpiece surface percussion, and glass pellet hardness is relatively low, it can be ruptured in a part of glass pellet of course of injection, after being mixed with flow, hydro-abrasion effect is generated to workpiece surface, therefore after compound abrasive water jet shot peening strengthening, workpiece surface has the residual compressive stress than traditional shot-peening bigger, while the rough rugosity value in surface is small.
Description
Technical field
The present invention relates to a kind of low-carbon steel part carburizing rear surface intensifying methods, belong to technical field of metal surface modification.
Background technology
It is limited by current equipment and technique, steel is after carburizing and quenching, it will usually in 20~200 μm of decarburizations that surface is formed
Layer, and decarburization so that material surface hardness and compression reduce or even tensile stress occurs in surface, to substantially reduce metal works
Fatigue life, skin decarburization problem can not be avoided using vacuum carburization technology completely, on the other hand since vacuum carburization is set
Standby space is limited, and cost is higher, and long and big workpiece is caused to be difficult to use vacuum carburization method, thus usually to carburizing and quenching after
Workpiece carry out bead, can remove the part decarburized layer and oxide layer on surface, and generate notable processing hardening, obtain certain
The compressive stress layer of depth, to improve the anti-fatigue performance of metal works.But workpiece is after existing bead technology, table
Face degree of roughness can sharply increase, and residual compressive stress maximum value is relatively inaccessible to -1000MPa or more, additionally easily occurs
Spray, generates a large amount of microdefects, to hinder the raising of workpiece fatigue life to a certain extent, thus considers surface intensified technique
Shi Bixu integrates the influence of residual stress and roughness.
Invention content
The object of the present invention is to provide a kind of devices, and low-carbon steel part simple, that production efficiency is high, applied widely is oozed
Carbon rear surface intensifying method, with overcome the deficiencies in the prior art.
Technical scheme of the present invention：A kind of low-carbon steel part carburizing rear surface intensifying method, this method use super-pressure number
The mode for controlling water jet carries out intensive treatment to the mild steel piece surface crossed by Carburization Treatment, i.e., compound abrasive is by dead weight
And the negative pressure that high-velocity flow generates, so that compound abrasive is entered in mixing tube and mixed with water, compound abrasive is after the acceleration of flow
With together with flow piece surface is ejected into from nozzle at high speeds.
In the above method, the compound abrasive is the mixture of glass pellet and steel ball ball, and wherein steel ball ball accounts for mixer mill
Expect the 20~50% of total volume, two kinds of abrasive material diameters are consistent, are 0.05~0.2mm.
In the above method, a diameter of 0.33mm of the nozzle, injection hydraulic pressure is 200~400MPa, and nozzle is away from part
Surface distance is 10~30mm, and spray regime is sprayed for straight line, and the flow of compound abrasive is 50~400ml/min, the shifting of nozzle
Dynamic speed is 10~600mm/min.
In the above method, when workpiece shapes to be painted are round, round piece is fixed by chuck and with 20~60r/min
Speed drive rotation, after compound abrasive water jet shot peening strengthening steel surface reduce 30~80 μm of micro- removals, and generate 300~
400 μm of strengthening layer, technological parameter are as follows：200~400MPa of hydraulic pressure, nozzle diameter 0.33mm, nozzle away from metal surface away from
From 10~20mm, spray regime is sprayed for straight line, and abrasive material is the mixture of glass pellet and steel ball ball, wherein shared by steel ball ball
Volume is 20~40%, and two kinds of abrasive material diameters are consistent, is 0.05~0.2mm, and abrasive material flow is 50~300ml/min, and nozzle moves
Dynamic speed is 10~100mm/min.
In the above method, when workpiece shapes to be painted are plate shaped, flat panel workpieces are fixed on by fixture on water tank, through mixing
Steel surface reduces by 30~100 μm of micro- removals after abrasive water-jet shot peening strengthening, and generates 300~500 μm of strengthening layer, technique
Parameter is as follows：200~400MPa of hydraulic pressure, nozzle diameter 0.33mm, nozzle are away from metal surface 10~30mm of distance, spray regime
Straight line sprays, and abrasive material is the mixture of glass pellet and steel ball ball, and wherein the volume shared by steel ball ball is 30~50%, two kinds of mills
Expect that diameter is consistent, be 0.05~0.2mm, abrasive material flow is 100~400ml/min, and nozzle movement speed is 100~600mm/
min。
Due to the adoption of the above technical scheme, the advantage of the invention is that：Present invention incorporates traditional hoodle shot-peenings and pure
The advantages of water jet shot-peening, by the way of ultra-high pressure numerical control water jet to the mild steel piece surface crossed by Carburization Treatment into
Row intensive treatment.Steel ball ball hardness is high in course of injection, strong to workpiece surface percussion, and glass pellet hardness is relatively low,
It can be ruptured in a part of glass pellet of course of injection, after being mixed with flow, hydro-abrasion effect be generated to workpiece surface, therefore is passed through mixed
After closing abrasive water-jet shot peening strengthening, workpiece surface has the residual compressive stress than traditional shot-peening bigger, while the rough rugosity value in surface
It is small.Therefore, compound abrasive particle of the present invention has workpiece surface in course of injection in the work of impact, abrasion, shearing
With the removal of 20~100 μm of surface being realized, so as to effectively reduce practical decarburized depth and surface roughness value.In addition, this
It is simple to invent the device used, production efficiency is high, applied widely, can also strengthen to complicated shape part, by mixing
Workpiece fatigue behaviour after abrasive water-jet shot peening strengthening can be greatly improved.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 2.
Reference sign：1- nozzles, 2- water tanks, 3- round pieces, 4- chucks, 5- flat panel workpieces.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and examples to this hair
It is bright to be described in further detail.
Embodiment 1
Workpiece to be painted in the present embodiment is the round low-carbon steel part crossed by Carburization Treatment.Referring to Fig. 1, will justify first
Shape workpiece 3, which is fixed by chuck 4 and driven with the speed of 30r/min, to be rotated, then by the way of ultra-high pressure numerical control water jet
Intensive treatment is carried out to 3 surface of round piece, i.e., the negative pressure that compound abrasive is generated by dead weight and high-velocity flow makes mixer mill
Material enters in mixing tube to be mixed with water, and compound abrasive is ejected into circle together with flow after the acceleration of flow from 1 high speed of nozzle
The surface of workpiece 3.Specific process parameter is as follows：Hydraulic pressure is 300MPa, and a diameter of 0.33mm of nozzle 1, nozzle 1 is away from round piece
3 surface distance is 10mm, and spray regime is sprayed for straight line, and compound abrasive is glass pellet (SiO2) and steel ball ball mixing
Object, 33.3% of compound abrasive total volume shared by steel ball ball, two kinds of abrasive material diameters are 0.1mm, and abrasive material flow is 80ml/min,
Nozzle movement speed is 10mm/min.
After tested, after this method bead, the surface roughness of round piece 3 is 1.8 μm, and residual stress is in hook
Shape is distributed, and maximum residual stress is -1720MPa, and at 50 μm away from surface, surface radius reduces 50 μm, and it is 400 to strengthen layer thickness
μm。
Embodiment 2
Workpiece to be painted in the present embodiment is the plate shaped low-carbon steel part crossed by Carburization Treatment.Referring to Fig. 2, first will
Flat panel workpieces 5 are fixed on by fixture on water tank 2, then to 5 surface of flat panel workpieces by the way of ultra-high pressure numerical control water jet
Intensive treatment is carried out, i.e., the negative pressure that compound abrasive is generated by dead weight and high-velocity flow makes compound abrasive enter in mixing tube
It is mixed with water, compound abrasive is ejected into the surface of flat panel workpieces 5 after the acceleration of flow together with flow from 1 high speed of nozzle.Tool
Body technology parameter is as follows：Hydraulic pressure is 250MPa, the diameter 0.33mm of nozzle 1, and surface distance of the nozzle 1 away from flat panel workpieces 5 is
15mm, spray regime are sprayed for straight line, and compound abrasive is glass pellet (SiO2) and steel ball ball mixture, mix shared by steel ball ball
The 40% of abrasive material total volume is closed, two kinds of abrasive material diameters are 0.1mm, and abrasive material flow is 150ml/min, the movement speed of nozzle 1
For 300mm/min.
After tested, after this method shot-peening, the surface roughness of flat panel workpieces 5 is 1.1 μm, and residual stress is in hook-shaped point
Cloth, maximum residual stress is -1788MPa, and at 80 μm away from surface, surface size reduces 80 μm, and it is 460 μm to strengthen layer thickness.
Claims (3)
1. a kind of low-carbon steel part carburizing rear surface intensifying method, it is characterised in that：Using existing ultra-high pressure numerical control water jet
Mode carries out intensive treatment to the mild steel piece surface crossed by Carburization Treatment, i.e., compound abrasive is by dead weight and high speed water
The raw negative pressure of miscarriage makes compound abrasive enter in mixing tube and is mixed with water, and compound abrasive is after the acceleration of flow together with flow
It is ejected into piece surface from nozzle at high speeds；The compound abrasive is the mixture of glass pellet and steel ball ball, and wherein steel ball ball accounts for
The 20 ~ 50% of compound abrasive total volume, two kinds of abrasive material diameters are consistent, are 0.05 ~ 0.2mm；A diameter of 0.33mm of the nozzle,
Injection hydraulic pressure is 200 ~ 400MPa, and surface distance of the nozzle away from part is 10 ~ 30mm, and spray regime is sprayed for straight line, mixer mill
The flow of material is 50~400ml/min, and the movement speed of nozzle is 10 ~ 600mm/min.
2. low-carbon steel part carburizing rear surface intensifying method according to claim 1, it is characterised in that：Workpiece shapes to be painted
For circle when, by round piece fixed by chuck and with the speed of 20 ~ 60r/min drive rotate, through compound abrasive water jet
Steel surface reduces by 30 ~ 80 μm of micro- removals after shot peening strengthening, and generates 300 ~ 400 μm of strengthening layer, and technological parameter is as follows：Hydraulic pressure
200 ~ 400MPa, nozzle diameter 0.33mm, nozzle are sprayed away from metal surface 10 ~ 20mm of distance, spray regime for straight line, and abrasive material is
The mixture of glass pellet and steel ball ball, the wherein volume shared by steel ball ball are 20 ~ 40%, and two kinds of abrasive material diameters are consistent, are 0.05
~ 0.2mm, abrasive material flow are 50 ~ 300ml/min, and nozzle movement speed is 10 ~ 100mm/min.
3. low-carbon steel part carburizing rear surface intensifying method according to claim 1, it is characterised in that：Workpiece shapes to be painted
When being plate shaped, flat panel workpieces are fixed on by fixture on water tank, and steel surface is reduced after compound abrasive water jet shot peening strengthening
30 ~ 100 μm of micro- removals, and 300 ~ 500 μm of strengthening layer is generated, technological parameter is as follows：200 ~ 400MPa of hydraulic pressure, nozzle diameter
0.33mm, nozzle are sprayed away from metal surface 10 ~ 30mm of distance, spray regime for straight line, and abrasive material is glass pellet and steel ball ball
Mixture, the wherein volume shared by steel ball ball are 30 ~ 50%, and two kinds of abrasive material diameters are consistent, are 0.05 ~ 0.2mm, and abrasive material flow is
100 ~ 400ml/min, nozzle movement speed are 100 ~ 600mm/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919429.XA CN106272096B (en) | 2016-10-21 | 2016-10-21 | A kind of low-carbon steel part carburizing rear surface intensifying method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610919429.XA CN106272096B (en) | 2016-10-21 | 2016-10-21 | A kind of low-carbon steel part carburizing rear surface intensifying method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106272096A CN106272096A (en) | 2017-01-04 |
| CN106272096B true CN106272096B (en) | 2018-10-12 |
Family
ID=57720152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610919429.XA Active CN106272096B (en) | 2016-10-21 | 2016-10-21 | A kind of low-carbon steel part carburizing rear surface intensifying method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106272096B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309809A (en) * | 2017-06-01 | 2017-11-03 | 成都贝施美生物科技有限公司 | A kind of novel sand blasting device |
| CN107160292A (en) * | 2017-06-01 | 2017-09-15 | 成都贝施美生物科技有限公司 | Plant external surface abrasive blast equipment |
| CN109857061B (en) * | 2019-01-24 | 2022-05-17 | 贵州大学 | Workpiece surface residual stress regulation and control method based on thermal coupling model |
| CN110026281B (en) * | 2019-03-20 | 2021-01-01 | 西安维控自动化科技有限公司 | Method and device for removing heat insulation layer of engine shell |
| CN110640635B (en) * | 2019-09-24 | 2020-12-08 | 广州大学 | Coating-writing type metal workpiece surface reinforced grinding processing method and equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085840A (en) * | 1992-10-21 | 1994-04-27 | 川崎重工业株式会社 | The method for grinding of steel plate and grinding attachment thereof |
| CN1664156A (en) * | 2005-03-22 | 2005-09-07 | 天津大学 | Method for enhancing performance of tungsten carbide base carbide alloy by liquid shot blasting |
| CN101733707A (en) * | 2010-01-25 | 2010-06-16 | 广州大学 | Intensified abrasive machining method for mechanical surface |
| CN102430983A (en) * | 2011-11-24 | 2012-05-02 | 西南科技大学 | Two-side material supply type high-pressure grinding material water jet flow polishing device |
| CN103419137A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Roller surface strengthening and roughness controlling method |
| CN105234832A (en) * | 2015-10-26 | 2016-01-13 | 刘全 | Abrasive material jet mixing method and device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2717241B2 (en) * | 1995-03-28 | 1998-02-18 | 工業技術院長 | Processing method of material by hydrojet |
-
2016
- 2016-10-21 CN CN201610919429.XA patent/CN106272096B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1085840A (en) * | 1992-10-21 | 1994-04-27 | 川崎重工业株式会社 | The method for grinding of steel plate and grinding attachment thereof |
| CN1664156A (en) * | 2005-03-22 | 2005-09-07 | 天津大学 | Method for enhancing performance of tungsten carbide base carbide alloy by liquid shot blasting |
| CN101733707A (en) * | 2010-01-25 | 2010-06-16 | 广州大学 | Intensified abrasive machining method for mechanical surface |
| CN102430983A (en) * | 2011-11-24 | 2012-05-02 | 西南科技大学 | Two-side material supply type high-pressure grinding material water jet flow polishing device |
| CN103419137A (en) * | 2012-05-25 | 2013-12-04 | 宝山钢铁股份有限公司 | Roller surface strengthening and roughness controlling method |
| CN105234832A (en) * | 2015-10-26 | 2016-01-13 | 刘全 | Abrasive material jet mixing method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106272096A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106272096B (en) | A kind of low-carbon steel part carburizing rear surface intensifying method | |
| CN204183419U (en) | A kind of Novel sand-jet shot blasting equipment | |
| CN103419137B (en) | A kind of roller surface hardening and roughness control method | |
| Soyama et al. | Fatigue strength improvement of gears using cavitation shotless peening | |
| CN103147033B (en) | Vehicle shock absorber piston rod spraying technology | |
| CN102729153A (en) | Polishing method by blasting and nozzle structure for blasting apparatus for use in the polishing method | |
| CN103014276B (en) | Micro-hole strengthening method combining cone pressure and laser impact | |
| CN111893278A (en) | Pulse current and shot blasting coupled metal material surface strengthening device and method | |
| CN101733707A (en) | Intensified abrasive machining method for mechanical surface | |
| CN201267961Y (en) | Novel abrasive blaster nozzle | |
| CN104404587A (en) | Method for reducing embedding of sand blasting medium into electroplating steel surface | |
| CN109487183A (en) | A kind of wet blasting surface modifying method suitable for aluminium lithium alloy | |
| CN111621629B (en) | Shot blasting process for nut surface strengthening | |
| CN104673972B (en) | A kind of jet shot-blast unit | |
| CN111270068A (en) | Surface strengthening process for prolonging fatigue life of intersecting line position of inner cavity of pump head body of fracturing pump | |
| CN107322486A (en) | A kind of the Premixed Abrasive Water Jet shot-blast unit | |
| CN107009276A (en) | Abrasive water-jet steel wire rust cleaning production line | |
| CN109423543A (en) | A kind of Treatment of Metal Surface propellers and its processing unit and processing method | |
| CN201309122Y (en) | Inner hole surface hardening equipment for ultralong pores | |
| CN114438307A (en) | Laser shock-ultrasonic rolling composite strengthening method | |
| CN203228120U (en) | Rust removal device for steel plates | |
| CN106670976A (en) | Method of high-pressure abrasive water flow-jetting workpiece polishing | |
| CN203245739U (en) | Device for descaling inner walls of steel pipes with diameters between 20 mm and 100 mm | |
| CN207483787U (en) | A kind of Treatment of Metal Surface propellers and its processing unit | |
| CN203266432U (en) | Shot blasting machine for processing barrel of fire extinguisher |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |