Nan prezan% 2c souvan itilize redi pwosesis sou sifas la metal difisil-sele boul 22 enkli swiv la!3a
(1) sifas la esfè sphere surfacing (oswa flite soude) ak alloy, ka rive jwenn 40HRC. pwosesis nan sifas siman siman sifas la sphere se com 2c ak pwodiksyon efikasite se low. Large-zòn sifas fasil ide deformation pati yo aktyèlman, sifas la sphere esfè sifas la hardening arfasce itilize mwens mwens .
(2) Sifas la esfè plake ak difisil chromium, dite ka rive jwenn %60-65HRC, epesè 7b2{2}}0 ~ 0.10ram. chromium jwe kouch gen segondè mete rezistans rezistans rezistans sifas la tan pwosesis relativman senp pri pri koute se ba. Sepandan% 2c difisil chromium chromium diminye rapidman lage lage lage entèn estrès lè tanperati a monte leve% 2c ak li opere tem pa ka pi wo 427 degre Nan adisyon a lyezon fòs chromium chromium chromium low, ak plating kouch prone tonbe tonbe off.
(3) Sifas la esfè se plasma nitrided, ak yon sifas nan 60-65HRC yon nitrided epesè 7b2{2}}}%7 7b{3}}.40mm. plasma nitriding pwosesis poor korozyon rezistans nan jaden jaden pwodwi chimik endistri ak fò korozyon.
(4) The supersonic spraying (HVOF) process on the surface of the sphere has a hardness of up to 70~75HRC, high collective strength, and a thickness of 0.3-0.4mm. Supersonic spraying is the main process for surface hardening of the sphere. This hardening process is mostly used in highly viscous fluids in thermal power plants, petrochemical systems, and coal chemical industries; mixed fluids with dust and solid particles, and highly corrosive fluid media. The supersonic spraying process is a process in which oxyfuel combustion generates high-speed airflow to accelerate powder particles to impact the surface of the workpiece to form a dense surface coating¨J. During the impact process, due to the fast particle speed (500-750m/s) and low particle temperature (-3000 degree ), after impacting the workpiece surface, high bonding strength, low void ratio, and low oxide content can be obtained coating. The characteristic of HVOF is that the alloy powder particle speed exceeds the speed of sound, even 2-3 times the speed of sound, and the air flow speed is 4 times the speed of sound. HVOF is a new processing technology. The spraying thickness is 0.3-0.4ram. The coating and the workpiece are mechanically bonded.
lyezon fòs se (77MPa) ak porosity a kouch ba <1%). This process heats the workpiece to a low temperature (<93°C), the workpiece does not deform, and can be cold sprayed. When spraying, the powder particle speed is high (1370m/s), there is no heat affected zone, the composition and structure of the workpiece do not change, the coating hardness is high, and it can be machined. Spray welding is a thermal spray treatment process on the surface of metal materials. It uses a heat source to heat the powder (metal powder, alloy powder, ceramic powder) until it melts or reaches a high plasticity state, then sprays it by airflow and deposits it on the pre-treated workpiece surface to form a layer with the workpiece surface. (Substrate) firmly bonded coating (welding) layer. In the spray welding and surfacing hardening process, both the cemented carbide and the matrix have a melting process. There is a hot melt zone where the cemented carbide and the matrix meet. In order to fully achieve the performance of the spray welding or surfacing cemented carbide layer, we can avoid welding heat melting after processing. The area is the metal contact surface. It is recommended that the thickness of spray welding or surfacing cemented carbide should be greater than 3mm.