Effects of Zr,Y and Ba-Ca Modifier on the Microstructure and Properties of 00Cr25Ni7Mo4N Steel

Wang Zhongmin1; Zhang Zhongcheng1; Qin Sen1; Mao Lei1; Li Yiming2; Liu Haibin2

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Effects of Zr,Y and Ba-Ca Modifier on the Microstructure and Properties of 00Cr25Ni7Mo4N Steel
Vol. 31, Issue 2, Pages: 113-115(2011)
Published： 2011 ，
DOI：

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[1]王忠民,张忠诚,秦森,毛磊,李义明,刘海斌.Zr、Y和Ba-Ca变质对00Cr25Ni7Mo4N钢组织与性能的影响[J].特种铸造及有色合金,2011,31(02):113-115+200.

Wang Zhongmin1, Zhang Zhongcheng1, Qin Sen1, et al. Effects of Zr,Y and Ba-Ca Modifier on the Microstructure and Properties of 00Cr25Ni7Mo4N Steel. [J]. Special Casting & Nonferrous Alloys 31(2):113-115(2011)
[1]王忠民,张忠诚,秦森,毛磊,李义明,刘海斌.Zr、Y和Ba-Ca变质对00Cr25Ni7Mo4N钢组织与性能的影响[J].特种铸造及有色合金,2011,31(02):113-115+200. DOI：

Wang Zhongmin1, Zhang Zhongcheng1, Qin Sen1, et al. Effects of Zr,Y and Ba-Ca Modifier on the Microstructure and Properties of 00Cr25Ni7Mo4N Steel. [J]. Special Casting & Nonferrous Alloys 31(2):113-115(2011) DOI：

摘要

以00Cr25Ni7Mo4N铸造不锈钢的组织和性能为研究内容

试验了Zr、Y和Ba-Ca变质剂对钢的变质效果。试验表明

3种变质剂对抑制晶体长大

细化组织

改善铸造性能和提高材料的力学性能均产生良好效果;其中Y的变质效果最为显著

试样的断口宏观形貌得以明显改善

断口撕裂的颗粒细化程度是未处理试样的1/11;组织中孤立岛状的γ相明显圆钝和尺寸变小;夹杂物数量减少;因此

钢的流动性提高

铸造工艺性能得以改善

铸造缺陷减少;由于钢的组织细化

力学性能明显提高。变质后的材料在具备良好塑韧性（δ=19%）时

σb和σs分别提高了16.1%和41.2%。

Abstract

Effects of Zr

Y and Ba-Ca modifier on microstructure and properties of 00Cr25Ni7Mo4N stainless steel were investigated.The results show that castablity and mechanical properties of the stainless steel are greatly improved with the modifier addition as a result of refining grain size by inhibiting grain growth.Y modifier exhibits the most desirable modification effects

where fracture macro-shape is apparently improved

and grain size in fracture position is refined by 91% of un-treated samples.Meanwhile

isolated γ phase in the microstructure of the modified steel is obviously spheroidized and refined

and inclusions are decreased

leading to the increase of liquid steel fluidity and improvement of properties and elimination of the related defects.Mechanical properties of the modified steel are obviously improved as a result of refinement of microstructure

where tensile strength and yield strength are increased by 16.1% and 41.2%

respectively

with the desirable elongation of 19%.