Trinity Operating Procedures - TOPs
TOP-TREAT: In House Heat Treatment
Rev: 12/29/2019
Scope: This procedure establishes a system in which Trinity Forge processes, monitors and inspects in-house heat treatment of production parts and raw material.
Procedure:
STEP
WHO
WHEN
INFO TO USE
WHAT TO DO
1
Post
Forge Supervisor
As need
to heat treat production parts or raw material
Shop
Schedule
Schedule furnace time to heat
treat production parts or raw
material; notify Heat Treat
Worker that parts need to be
heat treated
2
Heat
Treat Worker
Upon
receiving parts to be heat treated
Traveler;
Shop Schedule;
SPEC ID
Verify
parts or material on Traveler
are to be heat treated; record
information in Heat
Treat Log
3
Heat
Treat Worker
Beginning
of heat treat cycle
Instructions
listed on
Traveler
Load parts
or raw material into furnace baskets; load into heat treat furnace; set
furnace temperature and cycle time
4
Heat
Treat Worker
During heat
treat cycle
Traveler;
Heat Treat
Chart
Verify
information recorded on Heat
Treat Chart;
verify furnace temperature
5
Heat
Treat Worker
End of heat
treat cycle
Traveler
Remove
baskets from furnace; forward to a cooling area; when parts are
completely cool, tag them; check hardness; record hardness on Hardness
Inspection Sheet; all hardness results are verified per TOP-HARDT
Note:
When checking hardness a sample must be pulled from the top and the
bottom of each basket or load for smaller heat code quantities
6
Heat
Treat Worker
Parts or
material fails hardness
Hardness
results recorded on Hardness
Inspection Sheet
Notify QC
Supervisor or Post
Forge Supervisor for
resolution when parts or
material fail hardness testing
7
Post
Forge Supervisor, QC
Supervisor
Notification
received of hardness failure
Hardness
results recorded on Hardness
Inspection Sheet
Process
failures per TOP-HARDT;
do not re-heat without authorization from
Forging Engineer
8
Heat
Treat Worker
Parts pass
hardness testing
Hardness
results recorded on Hardness
Inspection Sheet; Heat
Treat Chart
Forward
heat treated parts or material to Post Forge to process per TOP-BLAST;
clock
off
Traveler
| *Trinity Forge General Hardness Chart | |||
| Lot Size | Sample Size | Defects Accepted | Defects Rejected |
| 1-5 | All | 0 | 0 |
| 6-10 | 1 | 0 | 1 |
| 11-20 | 2 | 0 | 1 |
| 21-50 | 3 | 0 | 1 |
| 51-100 | 4 | 0 | 1 |
| 101-200 | 6 | 0 | 1 |
| 201-400 | 10 | 1 | 2 |
| 401-600 | 13 | 1 | 2 |
| 601-1000 | 16 | 1 | 2 |
| 1001+ | 20 | 2 | 3 |
Revision history:
|
Release Date |
Description of Change |
Owner |
Approver |
|
12/06/2017 |
Updated to comply with revised Quality Manual and new TOPs format. |
Tim Ellis |
Todd Sheppard |
|
12/29/2019 |
Removed references to Maintenance in step 1 |
Dustin Jump |
Todd Sheppard |
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