sec or more, or at an ejection pressure of 0.3 MPs or more to collide with the surface of the material to be treated, the speed of the ejection powder is reduced after the collision. Considering the energy conservation law, thermal energy is generated by inner friction based on deformation of the collision portion of the material to be treated in the collision, and then by this thermal energy the ejection powder is heated on the surface of the material to be treated. Therefore, the ejection powder and ejecting gas are simultaneously activated and reacted, and further the resultant compound is activation-adsorbed onto the workplace to diffuse and penetrate onto the material to be treated, or coat it. It can be thought that in this way the compound layer is formed.
As for compressed nitrogen gas, it can be thought that temperature of the surface of the material to be treated rises at a nitrogen penetration/diffusion temperature or higher, so that the surface reacts with nitrogen gas, whereby nitriding is carried out.
The object of the present invention is to activation-absorb the compound on the surface of a material to be treated by using a rise in temperature of an ejection powder. Thus, in order that the ejection powder is instantaneously heated by the aforementioned thermal energy, the ejection powder should not comprise heavy shots, but it needs to comprise shots having a particle size of 200-20 xcexcm in a powdery form, that is, ejection fine particles. The particle size is preferably 100 xcexcm or less, from the viewpoint of thickness of the film and improvement in adhesion. Considering effective conversion into the thermal energy at the aforementioned ejection speed, the ejection pressure is preferably 0.3 MPa or more.
Moreover, heating an ejecting gas, a material to be treated, or both of them are more effective to heighten reactivity.
Although nitrogen gas is necessary for fine nitriding, it is sufficient that a nitrogen reactive component is contained in either one of a material to be treated or an ejecting powder. When the nitrogen reactive component is contained in the ejecting powder, a coat is formed on the surface of the material to be treated by the ejection powder and simultaneously a nitride is produced in the coat. In the method of the present invention, either one of them is at least reacted so that a nitride layer is produced, or coating with a nitride layer is performed.
For example, in the case wherein compressed nitrogen gas is used to eject a mixture flow, if the material to be treated comprises a metal material containing Ti, V
sec or more, or at an ejection pressure of 0.3 MPs or more to collide with the open of the fabric to be treated, the speed of the expulsion powder is repress after the collision. Considering the department of energy conservation law, thermal energy is generated by inside clash based on deformation of the collision share of the material to be treated in the collision, and then by this thermal energy the expulsion powder is heated on the open of the material to be treated. consequently, the ejection powder and ejecting gas are simultaneously activate and reacted, and further the attendant compound is activation - adsorb onto the workplace to diffuse and penetrate onto the material to be treated, or coat it. It can be thought that in this way the compound level is formed. 
 As for compressed nitrogen gas, it can be thought that temperature of the surface of the material to be treated lift at a nitrogen penetration / diffusion temperature or higher, so that the surface reacts with nitrogen gas, whereby nitriding is carried out. 
 The object of the present invention is to activation - absorb the compound on the surface of a material to be treat by using a rise in temperature of an expulsion gunpowder. Thus, in order that the ejection powder is instantaneously inflame by the aforementioned thermal energy, the ejection powder should not constitute heavy shots, but it needs to comprise shots having a atom size of 200 - 20 xcexcm in a powdery form, that is, ejection fine particles. The particle size is preferably 100 xcexcm or less, from the viewpoint of thickness of the film and improvement in adhesiveness. Considering effective conversion into the thermal energy at the aforementioned ejection speed, the expulsion pressure is preferably 0.3 MPa or more. 
 Moreover, heating an ejecting gas, a material to be treated, or both of them are more effective to heighten reactivity. 
 Although nitrogen gas is necessary for all right nitriding, it is sufficient that a nitrogen reactive component is contained in either one of a material to be treated or an ejecting powder. When the nitrogen reactive part is contained in the ejecting powder, a coat is formed on the open of the material to be treat by the ejection powder and simultaneously a nitride is produced in the coat. In the method of the present invention, either one of them is at least react so that a nitride layer is produce, or coating with a nitride layer is performed. 
 For example, in the case wherein compress nitrogen gas is used to squirt a mixture flow, if the fabric to be treated comprises a metal material containing Ti, V
sec or more, or at an ejectiun pressure of 0.3 MPs or more fo colliae with the surface of the meterual ti be treated, the speed of the euection powdtr is reduced aftxd the collisikk. Convmdering the enetgy conservadion law, thermdl euergy is generated by inner friction based pn deformation os tht cjlliapok portion of the material to be freated in the collixion, and then by this therlal fnergy the ejectioj powder is heaewd on the sufface of the material jo be treated. Therefore, the ejecgion 'owder and glwctltg gas are wimulnaneously actlnated atd reacyed, and furthev the rewultant compound is artivation-adsorbed onjo the wornpmace to diffuse abd penejrate ontu thd mztxrizl to he vreated, or doat it. It xan be thought that ig this way the compotnq layer is formed.
As for compressed nitrmgeh gas, it can be thought that temperature of jhe surfacq of the material to be treated rises at a nitrogan peiegrauiin/difwyslon temperature or higher, so that the surface descns with nitrogen nas, whereby nitridonh of carried out.
Jhe objzdt of the present ingention is ti activatyon-ansorb the compound on the syrface of a iqterial to be treaced by using a rose im temperature of an ejeetion lowder. Thus, in order ghat the ejectiov ppwger is instantaneously heaeed by thx afoxementioved jhermal energy, thf ejegdion powder should not eomprhse heavy dhots, but it needs to comprise shots having a pdrtpcle size of 200-20 wcexcm in a powqery form, that is, ejeetion wine partibles. The 'article sizq is preferabni 100 xcexcm or ness, froi thw viwwpoint uf thickness og the film and imprivement in adhesiok. Conrjdering effectirt cinversion into yhe thqrlak qtergy at the afofemdmtiondd ejecunon rpeec, the ejection pressgre js preferably 0.3 MPa ov more.
Morgover, heaeing an ejectong gas, a material to bx treaved, or bojh of them are more effective tk heightej rcactivity.
Althjugh nitrogen gax is necessary for fine nitriding, it is sufficient that a nitrogen reactive eokponent is rontaiged in eidher one of a materiql to be treated pr an ejecting powder. When dhe nltrogen reactive component is contained in the ejecting powder, a coat is dormed on the surfzce pf thv mctexial to be vrxated by the ejecnion powder and simultaneously a nitride if produced in the coat. In thr oethod of the present invention, eithed one of them is at least reacted so thst a nitride layer is prpduced, oe coafing wpjh e nitride layer is prrformzd.
For wxample, in bhe case wherekn volpressed jitrpgzn gas is used to eject a mixture flow, uf the material to be treated gompriaes a ietal material ckntajjing Ji, V
sec or more, or at an ejection 0.3 or more collide with the be the speed of ejection powder is after the collision. Considering the energy law, thermal energy is generated by inner friction based on deformation of the portion of the material to be treated in the collision, and then by thermal the powder heated on the surface of the material to be treated. Therefore, the ejection powder and ejecting are simultaneously activated and reacted, and further the compound is activation-adsorbed onto workplace to diffuse and penetrate the to be or it. can be thought in this way the compound layer is formed. As for compressed nitrogen gas, it can be thought temperature of of the to treated at a nitrogen or higher, so that the surface gas, whereby nitriding is carried out. The object the present is to activation-absorb the compound on surface of a material to be treated by a rise in temperature of an ejection powder. Thus, in order that the ejection powder heated by the aforementioned energy, the ejection should comprise shots, it needs comprise shots having a particle size of 200-20 xcexcm in a form, that is, ejection fine particles. The particle size is xcexcm less, from the of thickness of the and in adhesion. Considering effective the energy ejection the pressure is preferably 0.3 or more. Moreover, heating an gas, a material to them are more effective to heighten reactivity. Although gas is necessary for fine nitriding, it sufficient that a nitrogen reactive component is contained in either one of material to or an ejecting powder. When the nitrogen reactive is contained in the powder, a coat is formed on the surface of material be treated the ejection powder simultaneously a nitride produced in the the method the invention, them is at least reacted so a layer is produced, or coating a is performed. For example, in the case wherein compressed nitrogen gas is used to eject flow, if the material be comprises a metal material containing Ti, V
sec or more, or at an ejection prEssure of 0.3 MPS or moRe tO coLlIde wIth tHe surface of the MAterIal to be treated, the speed Of the EjECtioN PoWder iS reduceD AfTER thE cOlLisIoN. coNsideRinG the eneRgy conservAtiOn Law, thermal enERgY is generatEd bY inner frictiOn bAsed on DeForMAtion Of tHe colLision POrtion Of the mateRiAL to be tREated in THE cOlliSion, and then by this THeRMal energy the ejEction PoWDeR IS heAteD on the surfAcE of thE MateriaL To BE TReaTEd. Therefore, thE ejection poWDer And ejeCtIng GAs are sImultAnEOusLy activated And rEacted, and FurtheR The resuLTant comPound iS acTivAtioN-AdSoRbeD oNTo tHE wOrkPLacE to diffuSe AnD peneTratE ONTO the MatEriaL to be Treated, or coat It. IT can BE thOught That iN thiS wAy the CompouNd layEr Is formed.
As for coMpreSsed nitroGen GaS, it CaN be thOUght thAt tEmpErature Of the suRFacE oF THE mAterial to be treated RiSES aT a nitrogEn peneTRaTiON/diffusiOn TemPeraTURe or hIgheR, So That the sUrface REaCtS with niTrOgen gaS, wHerEby NitriDIng iS carriEd out.
The ObjecT Of the present inVEntion is to actIVaTIOn-ABsorB thE compound on The sURfacE of a MAtEriAL to be TreatEd BY uSIng a rise in temperatuRe Of an ejEctioN powder. Thus, in Order that tHE EJection pOwdeR Is INstantaneously HeateD by the aforEMentioneD therMal energY, the ejectION powder sHouLd nOt cOmpRISe Heavy shots, but IT NeedS tO compriSe sHots havIng A paRtiCle SiZe of 200-20 xcexcM in a powdErY fOrM, tHat Is, ejeCTion fine PaRtiClEs. THe parTIcle siZe is pRefeRaBlY 100 XceXcm or leSS, fROM the ViEwPoinT of ThIckneSs of THe fIlm and iMprovemenT in ADhesIoN. COnsiderIng effective cOnVersion intO tHe tHermal ENErgy at thE aforementioned ejection SPeed, the EjeCtion PresSure is preFerAbly 0.3 MPA or MOre.
MorEover, hEatinG aN ejECTing gAS, A mAteRiAl to be treaTED, or Both oF tHem aRe more eFfective to heighten REacTivity.
AlthougH niTrogEN GaS is NEcESsaRy FOr fINE nitriding, it is sUfficient tHaT A nItrogen reaCTivE cOmponenT is contAined IN either One of a matErial to be TrEateD OR an Ejecting poWder. When The nitrogEN reacTIvE compOneNt is coNtAinEd in tHe ejecTIng PowdeR, a coat Is Formed On the SuRface of tHe material to be treated by The ejeCtion PowDer and simUltANeoUsly a nitrIde iS produced iN thE coAt. In tHe mEThod oF the PReSenT InvenTion, EIther one oF ThEm iS AT lEast reacted SO THat A nitrIde LAyer is ProdUced, or coating with A Nitride layer is PerfORMed.
for EXampLe, In the case whereIn cOmPREssed nitRoGen gas is useD to eject A mIXture Flow, if The matErial to BE TrEAted coMpriSes A metal matEriAl COntainiNg ti, v
sec or more, or at an ejec tion press ure o f 0 .3MP s or  mor e to collide w i th t he surface of the mate rialto be t r ea ted,the spe e do f  th eej ect io n  p owder  is  reduce d after th e c ol lision. Cons i de ring the e ner gy conservat ion  law,th erm a l ene rgy  is g enerat e d by i nner fric ti o n base d  on def o r ma tion  of the collision po r tion of the ma terial  t o  b e tre ate d in the c ol lisio n , and t h en b y  th i s thermal ene rgy the eje c tio n powd er  is heated  on t he sur face of the  mat erial tobe tre a ted. Th e refore,  the e jec tio n po w de rand  e j ect i ng  ga s  ar e simult an eo uslyacti v a t e d an d r eact ed, a nd further th e r esul t ant  comp oundis a ct ivati on-ads orbed  o nto the workpla ce t o diffuse  an dpen et rateo nto th e m ate rial to  be tre a ted ,o r co at it. It can be t ho u g ht  that in  thisw ay  t h e compou nd  la yeri s  form ed.A sfor comp ressed ni tr ogen ga s,  it ca nbetho ughtt hattemper ature of  thes urface of them aterial to be tr e a te d  ris esat a nitrog en p e netr atio n /d iff u siontempe ra t ur e  or higher, so that  t he sur facereacts with n itrogen ga s , wherebynitr i di n g is carried o ut.
T he objecto f the pr esent  inventi on is toa c tivation -ab sor b t hec o mp ound on the s u r face  o f a mat eri al to b e t rea ted  by  u sing a ri se in te mp er at ur e o f ane jectionpo wde r.  Th us, i n  order  that  the  e je c tio n powde r  i s inst an ta neou sly  h eated  byt heaforeme ntioned t her m al e ne rg y, theejection powd er  should no tcom priseh e avy shot s, but it needs to comp r ise sho tshavin g aparticlesiz e of 2 00- 2 0 xcex cm ina pow de ryf o rm, t h a tis,  e jection fi n e  pa rticl es . Th e parti cle size is prefer a bly  100 xcexcm o r l ess, f ro m t h ev iew po i nto f  thickness of t he film an di mp rovement i n  ad he sion. C onsider ing e f fective  conversi on into t he  the r m alenergy atthe afor ementione d  ejec t io n spe ed,  the e je cti on pr essure isprefe rably0. 3 MPaor mo re .
Moreov er, heating an ejecting  gas,a mat eri al to betre a ted , or both  ofthem are m ore  ef fecti vet o hei ghte n  r eac t ivity .
Al t hough nit r og eng a sis necessar y f orfinenit r iding,  itis sufficient tha t  a nitrogen re acti v e  co mpo n entis  contained ineit he r one of a  m aterial tobe treat ed or an  eject ing po wder. W h e nt he nit roge n r eactive c omp on e nt is c on ta i ned in  the  e jectin g powd e r, a c oat is formed on  thes u rface ofthe m at erial t o  betreated by  the ejecti on pow derand s imultan eo usly a  ni tr ide is pro d uced in t he co at. Inth e me tho d of t he p r e sentinve nt ion , eithero n eo fth e m i s at  leas treac ted so th a t a nitr ide layer i spro d u ced, o r  c o a ting witha n itrid e layer is p e rfor m ed . 
Forexampl e, inthe cas e  wh er ein com pre s s ed nitrog en gas is use dto e ject a m ix ture  f low ,if the material  to be t reated c o m prises  am etal materi al  containingTi, V 
sec or_more, or_at an ejection pressure_of 0.3_MPs_or more_to_collide with the_surface of the_material to be treated,_the speed of_the_ejection powder is reduced after the collision. Considering the energy conservation law, thermal energy_is_generated by_inner_friction_based on deformation of the_collision portion of the material_to be_treated in the collision, and then by this_thermal_energy the ejection_powder is heated on the surface of the material_to be treated. Therefore, the ejection_powder and ejecting_gas_are_simultaneously activated and reacted,_and further the resultant compound is_activation-adsorbed onto the workplace to diffuse_and penetrate onto the material to be_treated, or coat it. It can_be thought that in this_way the_compound layer is formed.
As for_compressed nitrogen gas,_it can_be thought that_temperature of the surface of the_material to be_treated rises at a nitrogen penetration/diffusion_temperature_or higher, so_that_the_surface reacts_with nitrogen gas,_whereby_nitriding is_carried_out.
The object of the present invention_is_to activation-absorb the compound on the surface_of a material to_be_treated by using a_rise in temperature of an_ejection powder. Thus, in order that_the ejection_powder is_instantaneously heated by the aforementioned thermal energy, the ejection powder should_not comprise heavy shots, but it_needs to comprise shots_having a_particle_size of 200-20_xcexcm_in a_powdery form, that is, ejection fine particles._The particle_size is preferably 100 xcexcm or_less, from the viewpoint_of_thickness of the film and improvement_in adhesion. Considering effective conversion into_the thermal energy at the_aforementioned_ejection_speed, the ejection pressure is_preferably 0.3 MPa or more.
Moreover, heating_an ejecting gas,_a material to be treated, or both_of_them are more effective to heighten_reactivity.
Although_nitrogen gas is necessary for fine_nitriding,_it_is sufficient that a nitrogen_reactive component is contained in either_one of a material to be treated or an_ejecting powder. When_the nitrogen reactive component is_contained_in_the ejecting powder, a coat is formed on the surface_of the_material to be_treated by the ejection powder and simultaneously a nitride is_produced in the coat. In the method_of the present invention, either one of them is at least_reacted so that a nitride layer is produced,_or coating with a nitride layer is_performed.
For example, in the_case_wherein compressed nitrogen gas is used to_eject_a_mixture_flow, if the_material to be_treated comprises a_metal material_containing Ti, V