Could anyone help me to find information on sulfinert information. It seems to be a passivation technique of stainless steels which bonds an inert silica layer into the surface of the steel?
I would like to have information on the type of this treatment (CVD, chemical conversion, ....) and if...
Could anyone help me to give a physical (idealy quantitative) basis on the evaluation of a demagnetization threshold? We need that the magnetization is low enough not to attract ferrous shavings or filings. Our practical upper limit is 8 Gauss (640 a/m) of residual magnetization.
An other...
We have pb with the surface of some parts made in 316L after an electrolytic polishing. The microstrucutre examination reveals an large amount of ferrite delta and we wonder if it could explain the aspect of the surface (like a presence of a white layer)
We have problems to understand some spring fracture facies. It works under compression, with probably some times flexion stress.
We are interested in web sites which show fracture facies linked with explications, like initiating, propagation and final break
We are frequently questionned about red coloration of parts : is it rust or only a coloration of a residual product like oil or temporary protection or anything else?
Today, we examine the parts with a magnifying device to see if the "rust" begins to dig the metal
Does anybone know an easy...
We manufacture a part approximately 3 mm thick (obtaine by fine blanking) with 3 zones surface hardened (high frequency treatment) for years.
We thought that this kind of treatment lead gave always a compressive state of the heat treated zones until we carried out stress measurements because of...
We search a conductive coating for an aluminium part (obtained by casting) with a black color.
Today, all our aluminium parts are anodized ad we expect the same (closer as possible) mechanical properties of the new coating.
We have chosen 316L for a piston of Ø 0.8mm but it seems that the mechanical properties are too low for the application = bending pbs
The dimensions cannot be modified==> we are seraching for materials with good corrosion properties, higher young modulus and if possible correct machining...
We have regularly straightening problems with high strengh materials like S355MC, S550MC after a laser cut operation. The elastic limits (355 MPa, 550 MPa) are obtained by thermo-mechanical process and we control these materials by hardness measures and by their chemical analysis(%C, %Mn)...
Our project consists of a system (like a gun) to fill a tank with hydrocarbure.
Thank you to give us any information about non-sparking materials : definitions, caracterisations, list of materials, surface treatements, specifications and normalisations.....
What do you think about material...
I am a little bit lost with all the commercial designations of superalloys : INCONEL, NIMONIC, WASPALLOY, INCOLOY..... I would like to find a general and clear overview of these materials (composition, mechanical properties, advantages and drowbacks) to help me to choose the best one for any...
The problem of hydrogen embrittlement of copper is known and linked to the oxgen content of the material. But I don't find anything concerning the embrittlement of brass. I would be grateful if somebody could give me some informations on this subject.
I'm also interesting on hydrogen...
