CQI-9
Special Process: Heat Treat System
Guideline
1
Agenda
• AIAG Special Process Initiative
• Heat Treat Work Group
• Heat Treat System Assessment Scope
• Heat Treat System Assessment Requirements
• Conclusions
2
AIAG Special Process Initiative
3
Definition of Special Processes
• Special Processes result in components whose
quality, reliability and durability may be
compromised by potential variation in the
process and the resulting defect is not feasibly
detected prior to use
4
Mission
• Ensure quality, reliability and durability of
components from “Special Processes”
5
Goal
• Reduction of campaigns, spills, recalls and
warranty claims related to components from
“Special Processes”
6
Project Team Organization
Quality Steering Special Processes
Committee Sponsors
Manage &
Special Processes Implement
Project Team
Heat Treating Work Group
Plating Work Group
Technical
Experts Welding Work Group
Coatings & Pretreatment Work Group
Chemical Processes Work Group
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Heat Treat Work Group
8
Need for HTSA
• There have been multiple quality issues in
the past several years as a direct result of
heat treat failures
• The domestic OEMs have monitored and
audited heat treat facilities differently over
the last several years
• This has resulted in suppliers having to
conform to several requirements from
different customers
9
HTSA TECHNICAL COMMITTE
• Core Members • Supporting Members
– Phil Mikula – TRW – Mike Wiezbowski – DCX
– Ed Jamieson – Bodycote – Mike Oberg – Induction
– Brett Lenhausen – GM Services
– Mel Dilley – DCX – Medina Kaknjo – Ford
– Young Kim – Ford – Todd Bensinger – DCX
– Murli Prasad – GM – Dave Calkins – DCX
– Curt Holmes – Metaldyne – Jeff Martin – ZF
– Pete Batche - Textron – Leonard Gadzinski – Textron
– Dean Higdon – Textron
– Tim Green – BSI
– Dave Hernacki – Commercial
– Scott Broderson - DCX
10
Heat Treat System Assessment
Scope
11
General
• The HTSA can be used to assess an
organization’s ability to meet the requirements in
this document, as well as customer, regulatory,
and the organization’s own requirements. The
HTSA can also be used between an
organization and its suppliers.
12
Goal
• The goal of the HTSA is the development of a
heat treat management system that provides for
continual improvement, emphasizing defect
prevention and the reduction of variation and
waste in the supply chain.
13
Goal
• This HTSA is intended to provide a common
approach to a heat treat management system
for automotive production and service part
organizations.
14
Scope
• The HTSA is applicable to sites where
customer-specified parts for production and/or
service are processed throughout the
automotive supply chain.
15
Assessment Process
• Ongoing assessments shall be conducted
annually, unless otherwise specified by the
customer.
• Each assessment shall include a review of the
organization’s systems using the HTSA.
• Successive Job Audits shall sample parts from
different automotive component manufacturers
that require compliance to the HTSA document.
16
Assessment Procedure
• Obtain current copy of CQI-9 Special Process:
Heat Treat System Assessment Guideline from
AIAG.
• Identify all heat treat processes to which CQI-9
Special Process: Heat Treat System
Assessment Guideline applies. Record these
processes on the HTSA.
17
Assessment Procedure
• Complete the HTSA, determining the level of
compliance. Sections 1-3 shall be completed
first and independent of any job audits
performed. A minimum of one job audit shall
be performed during each assessment.
18
Assessment Procedure
• Address each “unsatisfactory” item and
determine corrective action, including root cause
analysis and implementation of the
corresponding corrective action (s). Records of
corrective action, including verification, shall be
maintained.
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Assessor Qualifications
• Assessors shall have the following specific
experience to conduct the HEAT TREAT
SYSTEM ASSESSMENT portion of the
assessment:
Be an experienced quality management system
(QMS) internal auditor (e.g., ISO 9000:2000,
ISO/TS 16949:2002)
20
Proof
• The organization shall keep records as
evidence of compliance to the requirements
identified in the HTSA, as well as all appropriate
action plans to address any unsatisfactory
ratings. These records shall be readily available
for review by any customer requiring compliance
to the requirements within this document.
21
Heat Treat System Assessment
Requirements
22
Process Tables
• The Process Tables specify the tolerances of
process parameters and the frequencies for
checking process control parameters and parts.
The Requirements/Guidelines in the HTSA form
will notify the assessor when to refer to the
Process Tables.
23
Process Table I
– Process Table 1 – Ferrous
Carburizing
Carbonitriding
Carbon Restoration or Correction
Neutral Hardening (Quench and Temper)
Austempering
Martempering
Tempering
Precipitation Hardening – Aging
24
Process Table 2
– Process Table 2 – Ferrous
Nitriding (Gas)
Ferritic Nitrocarburizing (Gas or Salt)
25
Process Table 3
– Process Table 3 – Aluminum Heat Treating
26
Process Table 4
– Process Table 4 – Induction Heat Treating (Ferrous)
27
Process Tables
• These Process Tables contain requirements for:
– 1. Process and Test Equipment
– 2. Pyrometry
– 3. Process Monitor Frequencies
– 4. In-Process/Final Test Frequencies
– 5. Quenchant and Solution Test Frequencies
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Conclusion
• Both DaimlerChrysler and General Motors have
requirements for the use of the HTSA in their
Company Specific Requirements.
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