The purpose of this invention is to provide a method which can be used with zirconium alloy composition to improve the corrosion resistance of the nuclear fuel cladding and used as nuclear structural material, and a method for preparing zirconium alloy, the best heat treatment condition considering zirconium alloy, which has a negative effect on the corrosion resistance of tin was completely the removal of zirconium alloy, and the molybdenum content increased to greater than the solubility threshold level after copper added. According to the invention for zirconium alloys for nuclear fuel cladding containing 0.5 1.2 wt% Nb, 0.4 0.8 wt.% Mo, 0.1 0.15 wt.% of copper, 0.15 0.2 wt% of iron, and the rest is used for the preparation of zirconium and zirconium alloy used for including nuclear fuel cladding the following steps: firstly, through a mixture of zirconium alloy composition elements prepared by ingot; step two, to step 1 prepared by ingot in 1000 1050 C (beta) under the solution heat treatment 30 40 minutes, and then quenched in water cooling beta; step three, the in a second step heat treatment of the ingot in the 630 650 C 20 heating for 30 minutes, then 60 to 65% reduction of hot rolling; step four, the third step by hot rolled material in 570 590 DEG C under the first intermediate vacuum heat treatment 3 4 hours, and then to 30 40% reduction rate for the first time in the cold rolling; step five, step 4 by the first cold rolled material in 560 580 DEG C under two times the middle vacuum heat treatment 2 3 hours, and then to 50 60% reduction rate of cold rolling for second times; step six, to step in five in the second cold rolled material in 560 580 DEG C under three times the middle vacuum heat treatment 2 3 hours, and then to 30 40% reduction rate of cold rolling for third times; step seven, as well as in step six of the final heat treatment after rolling third cold rolled material.
【技术实现步骤摘要】
【国外来华专利技术】用于核燃料包壳管的具有优异的耐腐蚀性的锆合金以及其制备方法
本专利技术涉及一种用于核燃料包壳管的锆合金以及一种制备该锆合金的方法,更具体地说,涉及一种适用于核燃料包壳管和用于光的间隔栅以及重水反应堆核电站的具有优异的耐腐蚀性的锆合金以及一种制备该锆合金的方法。
技术介绍
一般而言,具有低中子吸收截面和优异的耐腐蚀性以及机械性能的锆以包含少量其它元素的合金形式提供,并因此被广泛用作核燃料包壳管、支撑栅格和反应堆内结构的材料。为了降低核燃料周转以提高反应堆的经济效益,目前高燃耗核燃料正受到越来越多的关注。在传统锆合金-2和锆合金-4用于核燃料包壳管的情况中,可能会加速腐蚀,不利地导致氢脆性和机械性能的恶化。因此,迫切需要开发具有高耐腐蚀性的锆合金,并且对其彻底的研究正在进行中。因为锆合金的耐腐蚀性和机械性能随添加的合金元素的种类和量以及制造方法的类型而高度易变,所以优化合金元素和制造方法是至关重要的。关于传统技术,美国专利第5,024,809号公开了一种具有提高的耐腐蚀性的锆合金,其基本上由0.5至2.0重量%的Sn和0.5至2.5重量%的Bi组成,并含有Mo、Nb和Te,其总和设定为0.5至1.0重量%的范围,余量为Zr。该合金被设计为内部锆合金保护层,同时以治金方式结合至包覆在锆管上的纯锆的内阻挡层,并且具有对应于内管的厚度的约1至30%的厚度。美国专利第5,017,336号公开了一种具有提高的耐腐蚀性和机械性能的锆合金,其基本上由0.2至0.9重量%的Sn、0.18至0.6重量%的Fe和0.07至0.4重量%的Cr组成,并且包括0.05至1.0重量%的N ...
【技术保护点】
一种用于核燃料包壳管的锆合金,其包括:0.5至1.2重量%的Nb,0.4至0.8重量%的Mo,0.1至0.15重量%的Cu,0.15至0.2重量%的Fe,以及余量为锆。
【技术特征摘要】
【国外来华专利技术】2015.04.14 KR 10-2015-00527101.一种用于核燃料包壳管的锆合金,其包括:0.5至1.2重量%的Nb,0.4至0.8重量%的Mo,0.1至0.15重量%的Cu,0.15至0.2重量%的Fe,以及余量为锆。2.根据权利要求1所述的用于核燃料包壳管的锆合金,0.5至0.6重量%的Nb,0.4至0.5重量%的Mo。3.根据权利要求1所述的用于核燃料包壳管的锆合金,1.1至1.2重量%的Nb,0.4至0.5重量%的Mo。4.根据权利要求1所述的用于核燃料包壳管的锆合金,0.5至0.6重量%的Nb,0.7至0.8重量%的Mo。5.一种制备用于核燃料包壳管的锆合金的方法,其包括以下步骤:(1)使包括0.5至1.2重量%的Nb,0.4至0.8重量%的Mo,0.1至0.15重量%的Cu,0.15至0.2重量%的Fe和余量为锆的混合物熔融,由此制备锭料;(...
【专利技术属性】
技术研发人员:崔敏英,睦用均,金润豪,罗年洙,李忠容,张勋,郑泰植,高大均,李成镛,李升宰,金载益,
申请(专利权)人:韩电原子力燃料株式会社,
类型:发明
国别省市:韩国,KR
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