Vacuum Heat Treatment Of 20CrMnTi Mold Carburizing Steel

20CrMnTi is carburizing steel, carburizing steel is usually low carbon steel with carbon content of 0.17%-0.24%.The automobile is used to manufacture transmission gear, is the medium hardenability of the carburizing steel Cr Mn Ti steel, its hardenability is higher, in order to ensure the quenching situation, especially has a high low temperature impact toughness.Steel for 20CrMnTi surface carburizing hardening treatment.Good machinability, small deformation and good fatigue resistance.

Characteristics and application
20CrMnTi is a good performance of carburizing steel, high hardenability, after carburizing and quenching has a hard and wear-resistant surface and tough heart, has a high low temperature impact toughness, medium weldability, after normalizing the machinability is good.Used for manufacturing cross sections <30mm bearing high speed, medium or heavy load, impact and friction of important parts, such as gear, ring gear, gear shaft cross head.It is an 18CrMnTi substitute steel, widely used for carburizing parts in automobiles.The tractor industry is used in the section below 30mm, bearing high speed.Medium or heavy load and shock.Friction of important carburized parts, such as gears.Shaft. Gear ring. Gear shaft.Spindle of sliding bearing.Cross head. Claw clutch.Worm, etc.

Heat treatment specification
Heat treatment specification and metallographic structure:
Heat treatment specification: Shanghai Gegang Vacuum Technology Co., Ltd. Model VOGQ-8812 vacuum oil quenching process: the first time 880℃, the second time 870℃, oil cooling;Tempering 200℃, water cooling, air cooling.
Detailed heat treatment specifications and mechanical properties:
Sample blank size /mm: 15
Heat treatment | | quenching heating temperature / ℃ | hardening: for the first time in 880℃.
Heat treatment | | quenching heating temperature / ℃ | second quenching: 870.
Heat treatment quenching | coolant, oil.
Tempering heat treatment heating temperature / ℃ : 200.
Tempering heat treatment of coolant: water and gas.
Mechanical properties | tensile strength sigma b/MPa | p: 1080.
Mechanical properties | yield point sigma s/MPa | p: 850.
● Heat treatment specification and metallographic structure:
Heat treatment specification: quenching: the first time 880℃, the second time 870℃, oil cooling;Tempering 200℃, water cooling, air cooling;
Metallographic structure: tempered martensite.
● Delivery status: Delivered under heat treatment (normalizing, annealing or high temperature tempering) or without heat treatment. The delivery status shall be specified in the contract.
●20CrMnTi density and elastic modulus:
Density :7.8×103kg/m3 Elastic modulus :207GPa Poisson’s ratio :0.25 Thermal conductivity :1.26×10-51/℃
Low 20 crmnti normalizing
20CrMnTi normalizing, 20CrMnTi steel in heating 860℃ thermal insulation speed cooling to 680℃ thermal insulation after air cooling isothermal normalizing process and heating 960℃ thermal insulation after fog cooling of high temperature normalizing process, the two kinds of process relative comparison of the difference and role.
Editing by Frank Lee
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