According to the working characteristics of medical devices, it is required to be resistant to a certain temperature (usually high-temperature steam disinfection), not rusty, high in strength and hardness (scalpel), and not easy to deform. The stainless steel material with the above characteristics is martensitic stainless steel, such as 3Cr 13 and 4Cr 13 martensitic stainless steel and 9Cr 18 stainless steel spring steel.

The heat treatment process is basically quenching and low temperature tempering.

The quenching temperature of 3Cr 13 steel is 1000 ~ 1050, and the oil quenching tempering temperature is 150 ~ 350.

The quenching temperature of 4Cr 13 steel is 1050 ~ 1 100, and the oil quenching tempering temperature is 150 ~ 350.

When tempering these two steels, in order to meet the needs of high-temperature disinfection (high-temperature disinfection steam can reach 300), try to choose a higher temperature, such as 300.

The quenching temperature of 9Cr 18 steel is 1000~ 1050, and the oil quenching tempering temperature is 200~300.

Of course, the materials mentioned above are all kinds of surgical medical instruments, injection puncture instruments, plastic surgical instruments, general diagnostic instruments, family planning instruments, orthopedic (orthopedic) surgical instruments and so on. Such as scalpel (scalpel handle and blade, flap knife, wart peeling knife, The Lancet, shovel, razor, dander scraper, pick knife, front knife, pedicure knife, nail knife and scalpel), surgical scissors (common surgical scissors, tissue scissors, comprehensive tissue scissors, suture scissors, plaster scissors, anatomical scissors, gauze bandage scissors, educational surgical scissors) and various tweezers (common hemostatic forceps). Wound forceps opener, skin curling forceps, bullet forceps, gauze stripping forceps, sponge forceps, towel forceps, catheter forceps, instrument forceps), basic surgical forceps (small vascular forceps, non-invasive forceps, tissue forceps, plastic forceps). Hooks (aneurysm needle, probe, hair-pushing needle, hair-planting needle, picking needle, straight needle for teaching, venous retractor, wound hook, flat retractor, double-ended retractor, skin retractor, dissection hook), stethoscope, etc. , excluding medical equipment materials, such as X-ray machines, B-ultrasound, CT, photographic equipment, laboratory equipment, etc. The materials of these complete sets of equipment are based on the technology of equipment parts.