提高双相不锈钢夹具强度和韧性的热处理工艺研究
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摘要
采用金相显微镜、扫描电镜、室温拉伸、低温冲击等方法,研究了σ相的析出和消除对2205双相不锈钢组织和力学性能的影响,用于指导双相不锈钢夹具的热处理。结果表明:随σ化处理时间的延长,晶粒尺寸减小,拉伸强度和屈服强度持续增加;随σ化处理时间的延长,冲击吸收功呈先升高再降低的趋势,48h时冲击韧性最好;双相不锈钢夹具通过σ相析出和消除的热处理工艺能达到提高强度和韧性的目的。
In order to guide the heat-treatment craft of duplex stainless steel fixture,the σ-phase precipitation and elimination of duplex stainless and its influence on micro-structure and impact property were studied by means of optical microscopy(OM),scanning electron microscopy(SEM), room temperature tensile and low-temperature impact testing. The results show that the grain size decrease, the tensile strength and yield strength increase all the time with increasing σ treatment time. The impact toughness increase firstly,and the maximum volume fraction is observed after σ treatment at 48 h,and then decrease with increasing σ treatment time. The heat-treatment craft by σ-phase precipitation and elimination can used to improve strength and toughness of duplex stainless steel fixture.
In order to guide the heat-treatment craft of duplex stainless steel fixture,the σ-phase precipitation and elimination of duplex stainless and its influence on micro-structure and impact property were studied by means of optical microscopy(OM),scanning electron microscopy(SEM), room temperature tensile and low-temperature impact testing. The results show that the grain size decrease, the tensile strength and yield strength increase all the time with increasing σ treatment time. The impact toughness increase firstly,and the maximum volume fraction is observed after σ treatment at 48 h,and then decrease with increasing σ treatment time. The heat-treatment craft by σ-phase precipitation and elimination can used to improve strength and toughness of duplex stainless steel fixture.
引文
[1]吴玖.双相不锈钢[M].北京:冶金工业出版社,1999.
[2]李新跃,罗宏,喻兰英.GX2Cr Ni Mo N22-5-3不锈钢的固溶处理工艺研究[J].热加工工艺,2011,40(4):164-165.
[3]胡景豫,谢月.化学成分对ASTM A890双相不锈钢组织的影响[J].兵器材料科学与工程,2011,34(2):58-60.
[4]高娃,罗建民,杨建君.双相不锈钢的研究进展及应用[J].兵器材料科学与工程,2005,28(3):61-63.
[5]赵科巍,马勤,张红霞,等.再结晶退火对冷变形00Cr22Ni5Mo3N双相不锈钢显微组织的影响[J].热加工工艺,2009,38(18):107-109.
[6]宾远红,李培芬,李志铮,等.不同固溶温度对双相不锈钢σ相析出及冲击韧性的影响[J].材料热处理学报,2013,34(8):136-141.
[7]I.Calliari,M.Zanesco,E.Ramous,et al.Effects of Iso-thermal Ageing and Continuous Cooling after Solubiliza-tion in a Duplex Stainless Steel[J].Journal of Materi-als Engineering and Performance,2007,16(1):109-112.
[8]Henrik Sieurin,Rolf Sandstr?m.Sigma Phase Precipita-tion in Duplex Stainless Steel 2205[J].Materials Sci-ence and Engineering,2007,A444:271-276.
[9]刘宗昌,任慧平,宋义全,等.金属固态相变原理[M].北京:冶金工业出版社,2003.
[2]李新跃,罗宏,喻兰英.GX2Cr Ni Mo N22-5-3不锈钢的固溶处理工艺研究[J].热加工工艺,2011,40(4):164-165.
[3]胡景豫,谢月.化学成分对ASTM A890双相不锈钢组织的影响[J].兵器材料科学与工程,2011,34(2):58-60.
[4]高娃,罗建民,杨建君.双相不锈钢的研究进展及应用[J].兵器材料科学与工程,2005,28(3):61-63.
[5]赵科巍,马勤,张红霞,等.再结晶退火对冷变形00Cr22Ni5Mo3N双相不锈钢显微组织的影响[J].热加工工艺,2009,38(18):107-109.
[6]宾远红,李培芬,李志铮,等.不同固溶温度对双相不锈钢σ相析出及冲击韧性的影响[J].材料热处理学报,2013,34(8):136-141.
[7]I.Calliari,M.Zanesco,E.Ramous,et al.Effects of Iso-thermal Ageing and Continuous Cooling after Solubiliza-tion in a Duplex Stainless Steel[J].Journal of Materi-als Engineering and Performance,2007,16(1):109-112.
[8]Henrik Sieurin,Rolf Sandstr?m.Sigma Phase Precipita-tion in Duplex Stainless Steel 2205[J].Materials Sci-ence and Engineering,2007,A444:271-276.
[9]刘宗昌,任慧平,宋义全,等.金属固态相变原理[M].北京:冶金工业出版社,2003.