ASME STP-PT-085:2017 pdf free download

ASME STP-PT-085:2017 pdf free download.EFFECT OF HOT WIRE FILL ERMETAL ADDITION ON GTAWHEATINPLJT FOR CORROSION RESISTANT OVERLAYS.
4. There does not appear to be a direct relationship between total weld metal volume (quantified by wire feed speed) and HAZ hardness. (See Figure 3-12 and Figure 3-13)
(a) P22: With the exception of CWI(X) (279 VHN) and HW5O (316 VHN), HAZ hardnesses were closely grouped between 292 and 301 VHN for the wire feed speed range between 55 and 3(X) inch/minute: in terms of WFS:TS ratio, the grouping was similar with the same outliers
(b) 4130: Results were similar to those for P22. except only I-I W50 (300 VHN) was outside the grouping between 271 and 286 VHN: trend was similar for WFS:TS ratio
(c) It appears that total weld metal volume has minimal effect on HAZ hardness
5. There does appear to be a relation beween WFS and HIR. however the relaüoiis are separated between CONV and [ID parameters. (See Figure 3-14)
(a) P22: A nearly linear relationship exiss between WFS and lllRv and WFS and H1R110. including the appropriate CW welds: similar relationships exist between WFS:TS ratio and
HIR.
(b) 4130: Similar relationships exist as for P22. except that CWIOO does not align with other HlR11 welds: this is likely due to the fact that the amperage used for CWI(X) was significantly lower than that used for the other HD welds.
(c) Since wire feed speed and secondary amperage are directly related with HW because of the way this equipment is controlled, it is not a surprise that there is correlation between WFS and HIR.
6. From all this data. two consistencies have emerged. i.e., CWIOO welds tend to have the lowest HAZ hardnesses and HW5O welds tend to have highest HAZ hardnesses even though the HIR for HW5O are significantly higher than those for the CWIOO welds. It has already been shown that there are no parameter reasons for these inconsistencies. One significant different between the two are shown in Figure 3-4 and Figure 3-5. and discussed briefly in 3.c.i and 3.c.ii above (where the comparison is between welds CW55 and CWIOO, but the same rationale still applies).