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加热温度对管线钢第二相粒子固溶及晶粒长大的影响 总被引:4,自引:1,他引:3
高韧性管线钢主要用于制造石油和天然气输送管 ,这类钢采用控轧控冷工艺生产 ,具有良好的综合性能。文中对X6 0管线钢中第二相粒子随加热温度升高在钢中的固溶情况进行了定量分析 ,测试了奥氏体晶粒粗化温度并对控轧控冷工艺中加热温度的选择进行了探讨 相似文献
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试验用NS3105合金(/%:0.021C,0.06Si,0.02Mn,0.0007S,0.007P,29.75Cr,59.90Ni,9.88Fe,0.0100N)经12t真空感应炉熔炼,保护气氛电渣重熔成3t锭,锻造开坯Φ236mm坯,热挤压成Φ95 mm×16mm蒸管,再冷轧成Φ63mm×10mm管。研究了冷轧管800~1140℃ 5~5min固溶处理对其组织的影响。结果表明,NS3105合金热加工管经60%变形量冷轧后,合金原有的等轴晶粒发生较大变形,冷轧管变形晶粒800℃开始发生回复再结晶,950℃基本完全再结晶;随着温度提高和时间加长,冷轧管再结晶晶粒不断长大,950~1080℃时,晶粒长大不均匀,出现混晶和粗细晶条带;1080~1120℃时,晶粒长大较均匀;大于1120℃,冷轧管晶粒长大明显,组织较粗大,NS3105合金冷轧管最佳固溶处理温度为1080~1120℃。 相似文献
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高韧性管线钢主要用于制造石油和天然气输送管,这类钢采用控轧控冷工艺生产,具有良好的综合性能,文中对X60管线钢中第二相粒子随加热温度升高在钢中的固溶情况进行了定量分析,测试了奥氏体晶粒粗化 温度并对控轧控冷工艺中加强温度的选择进行了探讨。 相似文献
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The influence of solid solution treatments on the dissolution of carbides precipitates,the grain size,and the hardness of high strength low expansion alloy were investigated through XRD analysis,microstructure observations,and theoretical computation.It was seen that most primary Mo2C type carbide band dissolved in a temperature range of 1 100-1 150 ℃.When the temperature was over 1 200 ℃,the grain size increased remarkably,which led to the reduction of hardness. 相似文献
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通过对GH901合金热处理制度的研究,总结出民用GH901合金采用1 070 ℃×3 h,WC 775 ℃×4 h,AC 705 ℃×24 h,AC,热处理方式更为合理. 相似文献
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C. H. Caceres Gemma E. Mann J. R. Griffiths 《Metallurgical and Materials Transactions A》2011,42(7):1950-1959
Cast specimens of Mg and of several Mg-Zn binary alloys with a wide range of grain sizes were deformed in tension and compression.
The k values calculated from the Hall–Petch (H-P) plots of the tensile 0.2 pct proof stress increased with the Zn content, from
0.24 MPa m1/2 for pure Mg to ~0.66 MPa m1/2 for the 2.3 at. pct Zn alloy; k values measured from compression tests were larger, typically by 0.05 MPa m1/2. When the strength measurements were corrected for the pseudoelastic strain resulting from elastic twinning, the k values generally increased, and the difference between tension and compression was eliminated. This showed that the larger
k values obtained in compression using uncorrected data were an artifact of the pseudoelastic effect. The apparent friction
stress varied between about 14 MPa for pure Mg to very low or negative values for the most dilute alloy, increasing again
to about 8 MPa for the most concentrated alloy. The use of strength data corrected for pseudoelasticity effects is necessary
for a consistent analysis of the grain size hardening. 相似文献
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本文对深冲用H68合金成品退火的晶粒度之影响因素进行分析,通过对原始晶粒度冷轧后(ε〉50%)的各种不同料温的晶粒度测试试验作出了不同料温情况下晶粒度的关系图,最后得出了两点结论,第一,H68合金板带的成品退火晶粒度不受原始晶粒度的影响,退火前冷加工率超过50%成品软态的晶粒度可获得最佳值;第二,H68合金板带的晶粒度与退火料温的关系是在550℃以下呈线性变化,大于550℃后变化不明显。 相似文献
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2试验方案和退火工艺
2.1试验方案
根据前节分析,H68合金属单相α高锌合金,第一再结晶温度低,第二晶粒易长大。结晶理论指出,原始晶粒粗大,加工退火后再结晶晶粒亦大,H68合金在成品冷轧前需经两次中间退火(6.5mm热轧卷坯退火,2.3mm冷轧卷坯退火), 相似文献