陶瓷喷完学习资料 PPT课件

1、陶瓷弹丸喷完的性能,Peening with Zirshot,Why using Zirshot? High performance ceramic material allows to exceed performance limits of pre existing metallic or glass shots. This brings advantages in technical performance, industrial efficiency and improvement in work conditions and environment care. Summary Zir

2、shot characteristics and behaviour, Peening of Titanium, Peening of Aluminium, Peening of High strength steel.,Zirshot, chemical composition and structure,Zirshot ceramic beads are fine and hard. They show a spherical shape. Thanks to their smooth surface, Zirshot is gentle with the work part, blast

3、ing machine and tooling.,Zirshot, Physical Characteristics Rz 5.83 m; Rmax 6.08 m,Ra 1.76 m; Rz 10.32 m; Rmax 10.72 m,Advantage: Better surface condition,Stainless Steel 316 Ti,Zirshot on Titanium Alloy TA6V,H.E. Franz, A. Olbricht, ICSP3, Garmisch-Partenkirchen Germany 1987,Optimal roughness with Z

4、irshot, requiring no polishing,Zirshot on Titanium Alloy TA6V,Smooth Surface without Polishing,When maximum acceptable roughness without polishing is 0.8 m Ra, Then Zirshot Z425 at maximum Almen intensity of A0.006” is a solution.,SAINT-GOBAIN ZIRPRO 2002,Zirshot on Titanium Alloy TA6V,High level of

5、 Residual Compressive Stress,Z210 - 0.007 A: Finer beads with higher Almen intensity provide both high level of stress at the surface and deep compressive layer,Z425 - 0.004 A: Minimum compressive stress at the surface is close to 700 MPa. Initial surface roughness is almost unchanged.,Z425 - 0.009

6、A: High level of compressive stress can be achieved as well as maximum depth of compressive layer.,SAINT-GOBAIN ZIRPRO 2002,H.E. Franz, A. Olbricht, ICSP3,1987,Zirshot on Titanium Alloy TA6V,Improvement of lifetime up to 40 times,Polished Ref. sample = 1,Zirshot on Aluminium Alloys,Optimal residual

7、stress profiles with Zirshot for two different alloys,G Villard & A Viola ATTT Metz-France 2000,In terms of level of compressive stress at the surface and depth of compressive layer, the two different alloys do not accept the same residual stresses profiles.,Zirshot onAluminium 2214 T6 Alloy,G Villa

8、rd & A Viola ATTT Metz-France 2000,30% improvement of endurance limit,Peening with ZIRSHOT brings 100 MPa of additional load possibility for a given lifetime.,Zirshot on High strength steel 300 M,S170 RC65,S170 RC46,S230 RC65,S230 RC46,Z600,?,Z425,Z150 ?,H. Barzoukas, J. Jauffret, ICSP4, 1990,Influe

9、nce of Almen intensity,Low Almen intensity,Fine and hard shots,Lab results for current hardness valuesCk 45 steel, hardened 665 HV10,Sollich and Wohlfahrt ICSP6, 1996,Single peening with Zirshot Z150 Highest maximum compressive stress and very close from the surface Fatigue lifetime for 900 MPa impr

10、oved by 5 versus S230 Same Fatigue strength as with S230,Double peening S230 + Z150 Good surface compressive stress deep compressive layer Fatigue lifetime for 1000 MPa improved by 5 versus single peening 50 MPa increase of fatigue strength,Single peening steel shot S230 Poor surface compressive str

11、ess and deep compressive layer Low fatigue lifetime,Peening parameters Steel shot S230 (0.58 mm 58-64 HRC) Almen intensity 0.35 0.40 mm-A Coverage rate 200% Zirshot Z150 (0.150 0.210 mm 700 HV) Almen intensity 0.10 mm-N Coverage rate 400%,Lab results for high hardness values Case hardened steel 16Mn

12、Cr5, 1060 HV 0,2,Double peening S230 + Z150 Good surface compressive stress and deep compressive layer,Sollich and Wohlfahrt ICSP6, 1996,Single peening with Zirshot Z150 Highest maximum compressive stress and very close from the surface Fatigue lifetime for 1000 MPa improved by 10 versus double peen

13、ing 100 MPa increase of fatigue strength versus double peening,Zirshot, Very good surface condition can be achieved, even for deep affected layer,SAINT-GOBAIN CREE 01/2003,Residual stress at the surface is decreasing when stored elastic energy is growing,SAINT-GOBAIN CREE 01/2003,-900,-800,-700,-600

14、,0,200,400,600,800,1000,Stored Elastic Energy (J),Residual Stress at the Surface (MPa),Z150/90/400,Z150/70/400,Z150/90/100,Z300/70/100,Z210/100/100,Z210/100/400,Z300/90/400,S800/50/100,Z425/65/100,Z300/70/400,S400/50/100,S800/50/150,Z150/70/100,Z300/90/100,S400/50/200,Zirshot, Application to Case Ha

15、rdened Transmission Gears,best fatigue strength with ceramic shot. Explanations high level of compressive residual stress at the surface, low roughness elimination of grinding traces. This confirmed previous results.,Peening parameters Single peening Zirshot Z150 (0.150 0.210 mm) Almen intensity 0.1

16、0 mm-N Coverage rate 400%,C. Peyrac, JF Flavenot, F. Convert, ICSP7, 1999,Zirshot, Industrial application on automotive precision springs,Challenge Increase durability and reliability of highly stressed compression and torsion springs. First step on sample springs Encouraging results Development on

17、actual springs Develop full scale production process that would insure repeatable results,Results on actual coil springs,Spring data, Material Oteva 75SC, Wire diam. = 4.88 mm, OD = 44.5 mm. Test data: Applied load between 63 and 1079 N/mm.,Results on actual coil springs,For 90% reliability, Single

18、peening with Zirshot is providing equivalent or slightly superior lifetime vs. double peening with steel shot,Industrial application,Batch tumbling type equipment Centrifugal wheel is used to propel the shot Batch of parts is tumbled in a bean shape belt Process parameters Previous situation: double

19、 peening with steel shot Steel cut wire 0.710 mm (55-62 HRC) Almen intensity 0.40 mm-A Coverage 100% Cast steel shot S110, 0.280mm(55-62 HRC) Almen intensity 0.20 mm-A Coverage 100% New process: single peening with Zirshot Zirshot Z210 (0.210 0.300 (mm) Almen intensity 0.22 mm-N Coverage 400% Machin

20、e adaptation Mass flow control of the ceramic shot Adjustment of the wheel rpm.,Industrial Examples,Shot peening of Titanium fan blade For aircraft engines,12 CNC driven Venturi guns Air suction reclaim system Dust and broken beads elimination by cyclone Size selection by sieving,Industrial Examples

21、,Shot peening of Power train pinion gears For cars,8 CNC driven nozzles (direct pressure) 12 positions index table with spinning at peening stations Air suction reclaim system Dust and broken beads elimination by cyclone Size selection by sieving,Industrial Examples,Shot peening of Aluminum wheels a

22、nd brakes For aircrafts,Zirshot Z150 and Z425 used in the same machine Robot driven nozzles (direct pressure) Automatic handling and positioning of parts Air suction reclaim system Dust and broken beads elimination by cyclone Size selection by sieving,Shot peening of Suspension springs For cars,2 peening lines Wheel turbines, 4 x 22 kW Spinner roll conveyer Air separator recycling system,Industrial Examples,Conclusions (1/3),The use of Zirshot is bringing endurance improvement by: smoothening the surface, bringing a high