Specialized in Cryogenic treatment

Transcription

1 PHOENIX TECHNOVATION C-6, T-204 PAVANA INDUSTRIAL COMPLEX, MIDC BHOSARI, PUNE Specialized in Cryogenic treatment

2 Types of Subzero treatment Shallow subzero treatment (SST) minus 80 degree C Deep Subzero treatment (DST) minus -80 to minus -150 degree C Cryogenic treatment (CT) minus 150 to minus 196 degree C

3 CRYOGENICS DEALS WITH EFFECT OF LOW TEMPERATURE ON MATERIALS CRYOGENICS STARTS WHERE THE REFRIGERATION ENDS PROCESSING TEMPERATURE IS BELOW -150 C IT S AN ADD-ON PROCESS TO CONVENTIONAL HEAT TREATMENT

4 SCOPE Cutting tools: cutters, knives, blades, drill bits, end mills, turning or milling inserts. There are two main types of cryogenic treatments of cutting tools. Forming tools: roll form dies, progressive dies, stamping dies. Mechanical industry: pumps, motors, nuts, bolts, washers. Medical: tooling, scalpels. Motorsports and Fleet Vehicles: brake rotors and other automotive components. Musical: Vacuum tubes, brass instruments, guitar strings and fret wire, piano wire, amplifiers, cables, connectors. Sports: Firearms, knives, fishing equipment, auto racing, tennis rackets, golf clubs, mountain climbing gear, archery, skiing, aircraft parts, high pressure lines, bicycles, motor cycles. Aerospace & Defense: communication, optical housings, weapons platforms, guidance systems, landing systems. Automotive: brake rotors, transmissions, clutches, brake parts, rods, crank shafts, camshafts axles, bearings, ring and pinion, heads, valve trains, differentials, springs, nuts, bolts, washers.

5 CRYOGENIC TREATMENT PROCESS Hardening Tempering

6 SET-UP FOR CRYOGENIC TREATMENT

7 WHY CRYOGENIC TREATMENT? RETAINED AUSTENITE IS A MAJOR ISSUE IN HARDENED AND TEMPERED STEELS RETAINED AUSTENITE DECREASES HARDNESS AND AFFECTS DIMENSIONAL STABILITY CRYOGENIC TREATMENT FACILITATES CONVERSION OF RETAINED AUSTENITE INTO MARTENSITE

8 WHY CRYOGENIC TREATMENT? ENHANCES PRECIPITATIONOF FINE TERTIARY CARBIDES IN STEELS INCREASES HARDNESS REDUCES SURFACE ROUGHNESS IMPROVEMENT IN WEAR RESISTANCE INCREASES FATIGUE LIFE OF THE COMPONENTS BETTER FRACTURE TOUGHNESS CHARACTERISTICS

9 EFFECT OF CRYOGENIC TREATMENT INCREASED CARBIDE DENSITY REDUCED SURFACE ROUGHNESS

10 EFFECT OF CRYOGENIC TREATMENT Surface Roughness, micron Hardness Rc Without Cryo With Cryo Without Cryo With Cryo Fatigue strength, MPa Wear rate mm 3 /m Without Cryo With Cryo Without Cryo With Cryo

11 CRYOGENIC TREATMENT: ADVANTAGES IMPROVEMENT IN MECHANICAL PROPERTIES INCREASED TOOLAND DIELIFE REDUCTION IN PREMATURE FAILURES OF THE COMPONENTS REDUCTION IN THE COSTOF REPLACEMENT OF TOOLS AND DIES PROCESS COULD BE CARRIED OUT AFTER CHEMICAL HEAT TREATMENT SUCH AS NITRIDING REDUCES VIBRATION OF THE SYSTEM

12 CRYOGENIC TREATMENT:APPLICATIONS CUTTING TOOLS DIE STEELS PRESS TOOLS HIGH PRECISION PARTS

13 Suggestions to end users Any deviation in Hardened and Tempered heat treatment condition of the steel, it is likely to respond poorly to cryogenic treatment and hence its resultant properties. So USER must ensure that prior treatment MUST be as per SOP of that steels to derive full benefit of Cryogenic treatment.