摘要
研究了热处理工艺对140 ksi等级In718合金组织与性能的影响。固溶温度采用1023、1030、1050℃三个温度,时效温度采用760、780、800℃三个温度,交叉试验共9组试验数据。然后对经不同热处理工艺后的合金试样进行室温拉伸、-60℃夏比V型冲击、硬度、晶粒组织等指标进行测试,并对断口组织和析出相进行分析。研究表明,随着固溶温度升高,In718合金强度降低、塑韧性升高,晶粒尺寸增大、δ相量减小;相同固溶温度下,随时效温度升高,In718合金强度降低、塑韧性升高,时效温度对晶粒尺寸无影响,γ″相的形貌由颗粒状、球状逐渐粗化为针状,γ″相数量也呈现减小趋势。其中,在1023℃固溶处理和760℃时效处理后合金的综合性能最佳,抗拉强度、屈服强度、塑性、冲击韧性等指标匹配达到最好水平。
The effect of heat treatment process on the microstructure and properties of 140 ksi grade In718 alloy was studied.The solid solution temperature adopted three temperatures:1023℃,1030℃and 1050℃,and the aging temperature adopted three temperatures:760℃,780℃and 800℃,the total of 9 sets of experimental data were cross tested.Then the alloy samples after different heat treatment processes were tested for room temperature tensile,-60℃Charpy V-notch impact,hardness,grain structure and other indicators,and analysis of the fracture structure and precipitates were analyzed.Research has shown that as the solid solution temperature increases,the strength of In718 alloy decreases,the plasticity and toughness increase,the grain size increases andδphase decreases;At the same solid solution temperature,as the effective temperature increases at any time,the strength of In718 alloy decreases and the plasticity and toughness increase.The aging temperature has no effect on the grain size.γ″phase gradually coarsens from granular and spherical to needle like,and the number ofγ″phases also shows a decreasing trend.Among them,the comprehensive performance of alloy is the best after solid solution treatment at 1023℃and aging treatment at 760℃,and the matching of indicators such as tensile strength,yield strength,plasticity,and impact toughness reaches the best level.
作者
张宏
李旭
陈华
唐琴
李林森
王立
高首磊
Zhang Hong;Li Xu;Chen Hua;Tang Qing;Li Linsen;Wang Li;Gao Shoulei(Special Metallurgical Products Research Institute,Daye Special Steel Co.,Ltd.,Huangshi 435001,China;Hubei Provincial Key Laboratory of High-quality Special Steel,Huangshi 435001,China;Daye Special Steel Co.,Ltd.,Huangshi 435001,China)
出处
《特殊钢》
2024年第4期139-145,共7页
Special Steel
关键词
热处理工艺
IN718合金
组织
性能
析出相
Heat Treatment Process
In718 Alloy
Organization
Properties
Precipitate Phase
