Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Effect of Matrix Phase on the Abrasive Wear Behavior of the High Cr White Iron Hardfacing Weld Deposites

고크롬 철계 오버레이용접층의 긁힘마모거동에 미치는 기지상의 영향

  • 백응률 (포항산업과학연구원 소재연구부문)
  • Published : 1998.02.01
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Abstract

The effect of matrix phase (austenite, pearlite, martensite) on the low stress abrasion resistance in the chromium-carbide-type high Cr white iorn hardfacing weld deposites has been investigated. In order to examine matrix phase, a series of alloys with different matrix phase by changing the ratio of Cr/C system by heat treatment were employed. The alloys were deposited twice on a mild steel plate using self-shielding flux cored arc welding process. The low stress abrasion resistance of the alloys against sands was measured by the Dry Sand/Rubber Wheel Abrasion Test(RWAT). Even though formation of pearlite phase in the matrix showed higher hardness than that of austenite, there was no observable difference in wear resistance between the pearlite and austenite phase for the same amount of chromium-carbide in the matrix. On the other hand, the formation of martensitic phase,, from heat treated austenitic alloys (high content of Cr), enhanced wear resistance due to its fine secondary precipitates.

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References

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