【正文】 s of metal [9]Strength or hardness properties of material generally decrease with increasing temperature of annealing, whereas plastic properties increase. Substantial lowering of strength values occurs at temperatures which are close to 600 176。 published in revised form ABSTRACT Purpose: was to examine effect of the parameters of cold deformation and recrystallization annealing on mechanical properties of a Nbmicroalloyed HSLA steel.Design/methodology/approach: Research of strip steel QStE 420 was based on a bination of laboratory cold rolling, recrystallization annealing in vacuum furnace, mechanical (particularly tensile) tests andmetallographic analyses.Findings: It was validated that by a sophisticated bination of size of previous cold reduction size and parameters of the following annealing it is possible to impact markedly a set of final properties of particular strips.Formability of the studied HSLA steel rises and vice versa strength properties fall with an increasing temperature of annealing.Research limitations/implications: The experiment should be supplemented by additional TEM analyses explaining the behaviour and role of precipitates.Practical implications: The experimentally obtained particular trends of mechanical properties may be utilized for optimization of conditions of heat treatment of the investigated HLSA steel in a cold strip rolling mill, reflecting the specific requirements for a relation between strength and plastic properties.Originality/value: Experimental potentialities of the Institute of Modelling and Control of Forming Processes in the sphere of cold rolling and heat treatment were introduced in their integrity for the first time.Keywords: Mechanical properties, HSLA steel strip, Cold rolling, Recrystallization annealingReference to this paper should be given in the following way:I. Schindler, M. Jano?ec, E. M237。ek a, . Dobrza241。 b, M. R249。?ek, S. Rusz, M. Marek, T. Kubina, J. Sojka, Modelling of casting, hotcharge rolling and coldstrip production from highcarbon steel, Archives of Civil and Mechanical Engineering 4 (2004) 104113. [15] T. Tanaka, Controlled Rolling of Steel Plate and Strip, International Metallurgical Reviews 26 (1981) 185212. [16] K. Yoshida, Present and Future Status of High Strength Steel Sheets for Japanese Autobodies, Transaction of the Iron and Steel Institute of Japan 21 (1981) 761766. [17] J. Zrn237。nek, Influence of cold rolling and annealing on mechanical properties of steel QStE 420, Journal of Achievements in Materials and Manufacturing Engineering 18 (2006) 231234. [14] I. Schindler, P. Kozelsk253。dek, B. Po??ta, V. D??dek, Rolling, ALFA, Bratislava, 1991 (in Slovak and Czech). [10] P. Korczak, Influence of controlled rolling condition on microstructure and mechanical properties of low carbon microalloyed steels, Journal of Materials Processing Technology 15758 (2004) 553556. [11] J. Lis, . Lis, C. Kolan, Processing and properties of CMn steel with dualphase microstructure, Proceedings of the 13th Scientific International Conference “Achievements in Mechanical and Materials Engineering” AMME’2005, Gliwice ?? Wis??a, 2005, 395398. [12] N. Prasad, S. Kumar, P. Kumar, . Ojha, Mechanical properties of coldrolled annealed HSLA steel, Journal of Materials Science 26 (1991) 51585162. [13] I. Schindler, M. Jano?ec, E. M237。steck253。?ek, M. Greger, R. Kocich, S. Rusz, I. Ju??i??ka, . Dobrza??ski, T. Ta??ski, Structure characteristics after rolling of magnesium alloys, Proceedings of the 13th Scientific International Conference “Achievements in Mechanical and Materials Engineering” AMME’2005, Gliwice ?? Wis??a, 2005, 8790.[4] V. D??dek, Heat Treatment of the Cold Rolled Steel Strips, SNTL, Praha, 1964 (in Czech). [5] J. GarciaVargas, . Hardwick, . Williams, Control of Mechanical Properties in Low Carbon Steel Using an Anneal – Strain – Anneal Method, Canadian Metallurgical Quarterly 19 (1980) 333343.[6] T. Gladman, The Physical Metallurgy of Microalloyed Steels, The Institute of Materials, London, 1997.[7] M. Jano?ec, I. Schindler, J. Pal225。實驗應(yīng)加以補充額外的透射電鏡解釋的行為和再結(jié)晶退火過程中析出的作用分析。據(jù)證實，由以前的冷軋和熱處理工藝參數(shù)的大小，得到以下一套適合它有可能影響對個體力學(xué)性能復(fù)雜趨勢的所有特殊曲線圖。相反，塑料性能尤其是在寒冷的20％左右降低（）是在這種情況下，對應(yīng)于高退火溫度是最好的。對塑料性能觀察到的趨勢。退火的應(yīng)用模式2（見圖5和8）是在機械性能最復(fù)雜的過程中造成的。4. 討論的結(jié)果然而，并非所有的等軸鐵素體晶粒。 切傷的金相樣品取自推出產(chǎn)品中垂直節(jié)（中部平行軋制方向）。冷軋和退火樣品在室溫下進(jìn)行拉伸試驗和布氏硬度試驗。??溫度變化速度沒有（收費）：供暖爐80分鐘內(nèi)到1200℃，冷卻至約1200在400℃180分鐘。??最大真空500帕。
??。羅爾斯設(shè)置與線性傳感器測量（）。對物理模型選定類型的基本優(yōu)點如下：
??高親和力真實情況。與主要是滾動的設(shè)備上大致相同，工業(yè)設(shè)備形成過程的模擬研究所交易。再結(jié)晶與上述三種模式之一nealing低后申請的實驗室真空電阻爐（圖3）和保護(hù)氣氛90％的氮氫組成的10％。這項工作的主要目標(biāo)是研究與再結(jié)晶幾對鋼的力學(xué)性能QStE 420退火多種方式相結(jié)合冷軋大小的影響.2. 實驗：。Disarranged state Structure oriented by deformation圖 1. 插圖變形金屬質(zhì)感的起源[9]退火后的影響微觀性質(zhì)因素中，最重要的是：冷成形前物質(zhì)結(jié)構(gòu)的初步性質(zhì)，總冷軋，退火條件（溫度和時間）和冷卻速度[1,5,6,7,10,13,15,17，18，19]。微粒的延展沿著軋制方向發(fā)生，晶體的晶格排列具有方向性。, M. R??i?ka, L. ?237。創(chuàng)作/價值：他們第一次完整的介紹，模型的成形和冷軋及熱處理領(lǐng)域的過程控制研究的實驗潛力。設(shè)計方法：在結(jié)合冷軋實驗室中，帶鋼QStE420在真空爐進(jìn)行退火再結(jié)晶，進(jìn)行機械（尤其是拉伸）性能測試分析研究。ek a, . Dobrza241。 b, M. R249。steck253。237。*通訊作者：E mail地址： ，在2009年3月1日公布的修正形式摘要：目的：在探討冷變形及再結(jié)晶的含微量鈮合金低合金高強度鋼的力學(xué)性能退火參數(shù)的影響。研究所遇到的問題：通過實驗，如何增加透射電鏡解釋的行為