Heat Treatment

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Heatmasters Group Heatmasters  Group is selection of heat treatment companies in seven countries.  The  Group  has  its  roots  in  Finland  and  has  over  35  years  of  experience  in  heat  treatments,  so  they  understand the demands made on high performance heat treatment equipment and services.  Strong investments on heat treatment control systems with computer‐based technology and  use  of  GSM  data  transfer  has  made  Heatmasters  one  of  the  leading suppliers  of  heat  treatment equipment. They design, manufacture, sell and service heat treatment equipment  and accessories. Productivity, accuracy and reliability are the key properties of our products. Furthermore Heatmasters Group offers heat treatment services in its own workshops in seven  countries  and  at  clients  project  sites.  First‐class  performance  and  accurate  temperature  measurements are essential for their heat treatment works. Heatmasters  specialists  serve  clients  on  several  industries,  helping  them  to  find  suitable,  effective and economical solutions in heat treatment.

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QUALITY REQUIREMENTS FOR HEAT TREATMENT IN CONNECTION WITH WELDING AND ALLIED PROCESSES EN ISO 17663:2009

Tapio Finnström HEATMASTERS SWEDEN AB Tagenevägen 34B 425 37 Hisings Kärra Tel +46 31 572 141 Fax +46 31 572 120

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QUALITY

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EN ISO17663:2009 SCOPE

This international standard provides guidance for manufacturers that perform heat treatment or produce heat-treated products or components

This standard can also be used as a basis for assessing the manufacturer or heat treatment company in respect to its heat treatment capability

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EN ISO 17663:2009 NORMATIVE REFERENCES

ISO 13916

Welding – Guidance on the measurement of preheating temperature, interpass temperature and preheating maintenance temperature

IEC 60584-2 Thermocouples – Part 2: Tolerances EN 10052

Vocabulary of heat treatment terms for ferrous products

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EN ISO17663:2009 EN ISO 13916 Standard defines different temperatures and the measurement (Tp) preheating temperature (Ti)  interpass temperature (Tm)  maintenance temperature

Distance of measuring point e  50 mm A = 75 mm

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EN ISO17663:2009 IEC 60584-2

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EN ISO17663:2009 EN 10052

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EN ISO 17663:2009 SUBCONTRACTING The manufacturer shall ensure that the subcontractor can comply with the quality  requirements the specifications

Any subcontractor shall work under the orders and responsibility of the manufacturer and  shall comply with the relevant requirements of the standard

Message of these sentences means that the company that is ordering heat treatment services  from other company must have knowledge to evaluate subcontractor = Know basic content of this standard  www.heatmasters.net

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EN ISO 17663:2009 PERSONNEL The manufacturer shall appoint a sufficient number of competent personnel for the  planning, performing and supervising of the heat‐treatment work according to specified  requirements The competence of personnel shall be confirmed by the manufacturer

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EN ISO 17663:2009 EQUIPMENT For an evaluation of capacity and capability, the manufacturer shall maintain a list of  essential equipment used for heat treatment

The equipment shall be adequate for the application concerned. All devices used for adjusting, measuring and recording the temperature shall be suitably  validated at specified intervals by calibrated measuring instruments. A file shall be kept on validated equipment including the validity. 

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EN ISO 17663:2009 HEAT TREATMENT ACTIVITIES

Heat treatment shall, as appropriate, be carried out in furnaces

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EN ISO 17663:2009 HEAT TREATMENT STAGES AND PARAMETERS The manufacturer of the product or component is responsible for determining the heat  treatment parameters Use of right heat  treatment parameters  has direct influence to  the result of the process

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EN ISO 17663:2009 LOADING AND TIMING OF THE PROCESS

In some cases loading temperature  should be specified

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EN ISO 17663:2009 HEATING RATE

Heating rate is related to  type and thickness of the  material. The given value is  maximum heating rate

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EN ISO 17663:2009 HOLDING STAGE

Holding temperature and  time is related to type  and thickness of the  material. Value of holding  temperature is normally  given as a temperature  range

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EN ISO 17663:2009 COOLING RATE & UNLOADING TEMPERATURE

Cooling rate is related to  type and thickness of the  material. The given value is the  maximum value for  cooling rate After unloading  temperature the product  can be cooled  uncontrolled  www.heatmasters.net

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EN ISO 17663:2009 HOLDING TIME Holding time starts when the temperature of all measuring points has reached  minimum value of the range of the holding temperature

Holding time stops when one  of the measuring points falls  below the minimum value of  the range of the holding  temperature

The holding time depends on the type of heat treatment, material and material  thickness www.heatmasters.net

® INFLUENCE TO HARDNESS

Place of the welding seam

Black diagram Heat treatment not used Yellow diagram Preheating in 300 °C Red diagram Stress relieving done in 680 °C

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INFLUENCE OF HOLDING TIME Extended holding time does not have important meaning in stress relieving Meaning of the holding time is to guarantee uniform temperature in heated object

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INFLUENCE OF THE RIGHT HOLDING TEMPERATURE Holding temperature has direct influence to the result of the process Right holding temperature in the example is 680 °C

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EN ISO 17663:2009 MINIMUM NUMBER OF MEASURING POINTS

Local heat treatment of circumferential components D [mm]

MP’s

Pitch

D< 170

1

-

170 ≤ D < 370

2

180°

370 ≤ D < 550

3

120°

D ≥ 550

4

90o

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EN ISO 17663:2009 HEATING ZONE & INSULATION ZONE

Width of the heating  zone (A)is determined  with a formula 

2,5 (2 Du  4e)e

,maximum 12e

Du = outside diameter, e = wall thickness Width of the insulation heating zone (B) is 2 x A www.heatmasters.net

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EN ISO17663:2009 HEATED BAND-WIDTH

L1 ≥ 1 ,25 (2D1  4 t 1)t 1 L2 ≥

2 ,5 (2D2  4 t 2)t 2

L3 ≥ 2 ,5 (2D3  4 t 3)t 3

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EN ISO 17663:2009 HEAT TREATMENT RECORD The heat-treatment personnel shall prepare heattreatment record for each product or component that has been heat treated

The standard includes information that shall be given in the heat treatment record

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EXAMPLES SHOULD RING YOUR BELLS

If you can see serial connected measuring circuits, it means cheating in temperature measurement

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EXAMPLES SHOULD RING YOUR BELLS

Should be installation for preheating?

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END OF THIS PART