Sintervac - Centorr Vacuum Industries

55 Northeastern Blvd,

Nashua, NH 03062

sales@centorr.com

Ph: 603-595-7233

Toll free: 800-962-8631

Fax: 603-595-9220

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Sintervac

The Sintervac™ product line services a variety of robust manufacturing requirements with delicate process control needs. Tungsten and Cemented carbides, performance and structural ceramics, cermets and high alloy steels represent a few. There are over 600 Sintervacs in field service throughout the world today. CVI is the world leader for carbide and structural ceramic applications.

Features

Cold Wall Vacuum Furnace design with integrated cooling jackets on the vessels and doors.
Stainless steel interior for internal contact points.
Rigid copper busswork for improved maintenance and the best electrical efficiency
Durable Heater designs with hot zones available in both graphite and metal hot zone configurations.

Optional Features

All stainless steel construction.
CE/VDE/TuV and other non US. standards for compliance.
Reactive Gas management systems Flowing gas management systems.
Integrated Mass flow controllers.
Sweepgas™ capability for flow and pressure management during delubeidewax Custom retort designs for repeatable processicarbon control
Integrated cooling fans with internal heat exchangers. pressure

Sintering
CVI pressure furnaces are used for a variety of processes associated with powdered metal production of hard metals and ceramics: Full densification, Zero A porosity for hard metals; better ceramic properties without additives; control of TRS, toughness and grain growth trade offs; Isostatic pressures between 60 and 100 bar are available. The furnaces operate for combination cycles including delube, vacuum sinter and pressure sinter. Partial pressure control, flowing atmosphere control and reactive gas management are typical features.

Delube/Dewax
CVI has specialized in process development for a variety of delube/dewax processes for carbides and ceramics. CVI process development encompasses a large effort for wax/polymer removal typical of injection molded hard metals and ceramics. Tight pressure and gas flow control in tandem with effective event based programming and sound retort design allows the entire load to view the same series of conditions as a function of time. This results in consistent downstream microstructures and repeatable carbon control. Depending upon the process requirements, a variety of wax and polymer condensation strategies have been utilized including vacuum delube condensation, Sweepgas™ condensation and CVIs proprietary BRS™ technology.

Sintervac® Furnace Series	Maximum Operating Temp., °C	Materials Processed and Main Features
A	1600	Hard Metals Cemented Carbides
B	1400	Tool Steels High Speed Steels
C	2300	Refactory Alloys Cermets Performance Ceramics
P (Sinterbar)	1600 - 2300 60 - 100 Bar	Cemented Carbides Hard Metals Cermets Performance Ceramics

Standard Model Number	Usable Cubic Feet (HOT)	Standard Usable Hot Zone W x H x L (inches - mm)
40	.37	8 x 8 x 20 200 x 200 x 500
100	2	12 x 12 x 24 300 x 300 x 600
150	3	12 x 12 x 36 300 x 300 x 900
300	4.5	18 x 12 x 36 450 x 300 x 900
500	9	24 x 18 x 36 600 x 450 x 900
300 (Sinterbar)	4.5	18 x 12 x 36 450 x 300 x 900
800 (Sinterbar)	11.25	18 x 18 x 60 450 x 450 x 1500

Control Strategy
CVI works with two basic control strategies:
A more conventional PLC based control system with Programmable, event based controls or a more capable, fully integrated PC based control system:

PC Based Control

Pentium Based PC workstation
Intellution based architecture for DDL
Full Data Acquisition Capability
Custom Reporting
Remote System operation / System Multitasking
Turnkey electrical integration

PLC Based Control

Programmable, event based control
PLC for trouble free system interlocking logic
Discrete controls for individual sensors with communication
Turnkey electrical integration
Optional remote interface