微观组织对3Cr13钢冲蚀行为的影响

Influence of Microstructure on Erosion Behavior of 3Cr13 Stainless Steel

在自制的射流式冲蚀磨损试验机上,对经过不同回火处理的3Cr13钢进行液/固两相流的冲蚀磨损试验,研究了微观组织对3Cr13钢冲蚀行为的影响,并探讨其冲蚀机理。结果表明,3Cr13钢三种回火组织均在45°冲角处观察到最大冲蚀率,200℃和500℃回火组织的抗冲蚀性能相近,均优于750℃回火组织,但750℃回火组织较先进入冲蚀稳定期。低攻角时,冲蚀机理以微切削为主;高攻角时,则以脆性剥落和疲劳破坏为主。

The liquid/solid erosion wear tests were conducted for 3Cr13 steel which had been tempered at different temperatures on the self-made jet-type erosion wear tester. The effects of microstructure on erosion behavior of 3Cr13 steel were investigated, and erosion mechanisms were also discussed. Results showed that for all the three tempered microstructures of 3Cr13 steel, maximum erosion rates were found at 45 degree angle of attack. The erosion resistance of specimens tempered at 200℃ and 500℃exhibi- ted no obvious difference, showing better erosion resistance than the specimen tempered at 750℃ which reached stable erosion stage earlier. The main erosion mechanism was characterized by miero-cutting at low angle of attack and by brittle spalling and fatigue damage at high angle of attack.