Induction Heated, Quenched and TemperedITW

Spring Steel Wire “ITWTM”

Fine Heat Technology

Zatec, CzechShanghai,China

Ako, Japan

Hamilton, OhioUSA

an

Hamilton, OhioHamiltUUSAS

C

◆Fig.1 Production History of ITWTM

Company Name Location EstablishmentNeturen Co., Ltd., Ako Plant ････････ Ako, Hyogo, Japan ･････････1946 (1977*)Shanghai Neturen Co., Ltd.･･････････ Shanghai, China ･････････････2003Neturen America Corp.･･･････････････ Hamilton, Ohio, USA ･･･････2007Neturen Czech s.r.o. ･･･････････････････ Zatec, Usti, Czech ･････････2012

Note(*): Neturen started producing and selling “ITWTM” in 1977.

Note(*): "ITW" is Neturen's trademark registerd at the USPTO. (Reg. No. 4,356,357)

AsiaEurope AmericaAsiaEurope America

Year

JPN AKO

CHINA SN

USA NAC

CZECH(NCZ)

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

1996

1995

1994

1993

1992

CZECH (NCZ)USA (NAC)CHINA (SN)JAPAN (AKO)

ITW World Wide Sales History (1992-2015)

Temper

Heating

Cooling

IH(ElectricPower)

Water

Lead Bath

Water

Fine and uniform micro-structure can be obtained by selecting suitable heating and cooling conditions.

◆Table 1. Comparison between the Process of ITW vs. OTW

Alternating Flux

Eddy Current

Conductor Coil

Heating Object

High-FrequencyPower Supply

◆Fig.2 Principle of Induction Heating ◆Fig. 3 Induction Hardening Process for ITW

◆Fig. 4 CO2 Emissions Comparison

Tem

p.

. Water Cooling

Time

Surface

IH Heating

Core

Plasma nitriding 0.05 0.036

0.152

0.103

0.078

0.107

0.179

Direct emissions (gas)

Indirect emissions (electricity)

Normal gascarburizing

Vacuumcarburizing

Inductionhardening

0 0.05 0.1 0.15 0.2 0.25 0.3kg-CO2/kg-work

0.35

OTWITWQuench

Heating

Cooling

IH(ElectricPower)

Water

Gas

Oil

IH process provides rapid and short time heating through SELF-HEATING effect.

To provide Economical & Ecological IH Heat-Treatment System simply using electrical energy and water

■ Affiliate companies manufacturing NETUREN Induction Tempered Wire;

Shanghai Neturen Co., Ltd. 651 Beihe Road, Jiading, Shanghai, China Tel：+86-21-3351-7528 Fax：+86-21-3351-7538

Neturen America Corporation2995 Moser Court, Hamilton, Ohio, USA Tel：+1-513-863-1900 Fax：+1-513-863-1147

Neturen Czech s.r.o.Průmyslová zóna Triangle, Nehasice 1079, Bitozeves, 438 01 pošta Žatec, Czech republic Tel：+420-415-652-239 Fax：+420-415-240-311

NETUREN CO.,LTD. 2-17-1, Higashi-gotanda, Shinagawa-ku, Tokyo 141-8639, Japan　Tel : +81-3-3443-5444　Fax : +81-3-5488-7538

Neturen and its Group contentiously focus on “ITWTM” manufacturing. ITWTM is an abbreviation of “Induction Heated Quenched and Tempered Wire”, which has a high strength such as 2,000MPa (290ksi) and suitable for the cold forming process of springs. ITWTM provides the weight reduction and compact design for coil springs with the higher fatigue performance and higher sag resistance.

Grade Symbol

SWI-170SWI-180SWI-190SWI-200

Min. 35Min. 35Min. 35Min. 35

Max. 0.05Max. 0.05Max. 0.05Max. 0.05

±0.05±0.05±0.05±0.05

Reduction of Area (%) Roundness (mm) Tolerance (mm)Tensile Strength

◆Table 2. Specification of ITW

◆Fig.5 Application of ITWTM

■〔BASIC〕ITW Diameter Range:7.00 ～ 16.00 mm 　　　　　 (0.275 ～ 0.630 inch)

(ksi)(MPa)1650-17501750-18501850-19501950-2050

240-254254-270270-283283-296