Steelmax Tools LLC’s Post

Microstructure of 316 SS welded joint applying TIG technology, without using filler metal. The thickness of the plate is 0.7mm. Microstructure is Austenite matrix with some quantity Delta Ferrite that is formed like a lathy Delta Ferrite and interdendritic one! Small particles of carbides are uniformly distributed into matrix! Etching: Kalling's reagent. Magnification: X500

TIG welding of SS- Delta ferrite formation in austenitic stainless steel.

What’s the best way to weld thin metals without burning through? 1. Use a lower amperage setting 2. Use a shorter arc length 3. Use a backing strip 4. All of the above

What is Sintering ❓ 1️⃣ Metal sintering is the interdiffusion of surface atoms on adjacent metal particles to create an open network of tiny microvoids, versus traditional solder which melts (reflows) completely. 2️⃣ Temperature, pressure, time, and nature of the sintering atmosphere are the primary factors controlling densification and joint strength. 3️⃣ It is often the process of choice for forming joints involving materials with high melting points.

TIG welded plates( t=0.7mm) of 316 Stainless Steel,without filler metal. In Austenite matrix Delta Ferrite was interdendritic formed. Etching: Kalling's reagent. Magnification: x500

Cracks Cracks are imperfections produced by local rupture in the solid state, which may arise from the effect of cooling or stresses. 1\Types of cracks from the shape point of view - Longitudinal. - Transverse. - Radiating. - Carter. - Branching. 2\Types of cracks from the localisation point of view - Weld metal. - HAZ. - Parent metal. 3\Types of cracks from the nature point of view - Hot (ie solidification or liquation cracks). - Precipitation induced (ie reheat cracks present in creep resisting steels). - Cold (ie hydrogen induced cracks). - Lamellar tearing. Exception: Crater cracks are found only in the weld metal.

Q23. What’s the best way to weld thin metals without burning through? 1. Use a lower amperage setting 2. Use a shorter arc length 3. Use a backing strip 4. All of the above (For answer & explanation, please click:https://lnkd.in/g8NW7RXG)

❓ Which kind of tool steel do you use for punch making, 1.2379 / D2/ DC53 / SKD11 /Cr12MoV or any other grade? 🏗 Ningshing keeps stock of finished tool steel standard plate. ✅ Size 8-120 x 100-300 mm ✅ Tol. +0.1/-0 mm 👉 To reach high hardness of over 60 HRC, cryogenic treatment is a crucial procedure, that is done immediately by liquid nitrogen as soon as quenching finished. Tempering is necessary as a last step. #toolsteel #punch #standardplate #HARDNESS #hardnesstesting #cryogenictreatment #quenching #tempering #Ningshing #PrecisionMachinery

❓ Which kind of tool steel do you use for punch making, 1.2379 / D2/ DC53 / SKD11 /Cr12MoV or any other grade? 🏗 Ningshing keeps stock of finished tool steel standard plate. ✅ Size 8-120 x 100-300 mm ✅ Tol. +0.1/-0 mm 👉 To reach high hardness of over 60 HRC, cryogenic treatment is a crucial procedure, that is done immediately by liquid nitrogen as soon as quenching finished. Tempering is necessary as a last step. #toolsteel #punch #standardplate #HARDNESS #hardnesstesting #cryogenictreatment #quenching #tempering #Ningshing #PrecisionMachinery

Induction Melting Metal Furnace  #inductionfurnace #inductionheating #meltingmetal #inductionmelting