Description

1. Process and Standard

1.1 Process flow

        Carbon dioxide sodium silicate-bonded sand+Chromite sand modelling→Arc furnace+ seconclary refining→heat treatment→Large spectrum+Visual inspection+UT+MT+Tensile strength inspection

1.2 Standards

Design standards:GB EN DIN standard

1.3 Chemical composition G*6Mn5

C  0.***0.2 %   

Si ≤0.6%

Mn **1.5% 

P  ≤0.*2%

S  ≤0.**5%

Cr ≤0.3%

Mo ≤0.*5%

Ni ≤0.4%

1.4 Mechanical properties

Tensile strength        ≥**0Mpa

Yield strength        ≥**0Mpa

Elongation rateA %    ≥*0%

 

2.Production process and standard

2.1  Pattern inspection, offer drawing and self-check

2.2  Moulding, self-check

2.3  pour casting C/W cotb, self-check

2.4  Chemical analysis complies with 1.3Chemical composition and offer test report

2.5  Visual Inspection of casting and offer draing

2.6  Dimensional check of casting and offer drawing

2.7  Heat treatment and offer test report

2.8  Clean casted, shot-blasted and fettled

2.9  Mechanical properties test

Samples comply with 1.4 Mechanical properties

2.*0 NDT

2.*1 Submit MTC  

2.*2Document Review, data book

2.*3 Release & Transport

3. Quality Assurance and inspection standard

Each slag pot should be casted one time.

Pattern standard：H1 according to DIN***1

Each slag pot certificates acc. To DIN/EN ****4 3.1B, and submit the following relavent qualified inspection reports:

3.1 Visual inspection

For surface acc. to DIN ****4:***8

i. Not allowed the following visible defects: sand hole, slag inclusion, blow hole（pinhole, gas hole）, laps and cold shuts, chaplet mark, gas cutting mark, casting burr, agglomeration,crater,convexorsunken creasing, air pocket, cold iron mark, crack ect.

·                                ii．Submit visual inspection report

3.2Demensional test

i．  Inspect all demensions

ii．Submit report
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