CN108080632A - 一种具有燃烧功能药型罩材料及其制备方法 - Google Patents
一种具有燃烧功能药型罩材料及其制备方法 Download PDFInfo
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Abstract
本发明提供了一种具有燃烧功能药型罩材料及其制备方法,原料为铜粉、锆粉和钽粉,采用粉末压坯烧结,所述烧结为固液复合烧结,所述固液复合烧结分为两个阶段,第一阶段烧结温度800~1080℃,保温时间1~2h;第二阶段烧结温度1100~1150℃,保温时间0.5~1h。本发明制备的铜合金材料与传统药型罩材料相比穿透靶板厚,能引燃靶后的柴油、青草等物质。
Description
技术领域
本发明涉及金属材料技术领域,尤其涉及一种具有燃烧功能药型罩材料及其制备方法。
背景技术
战斗部是弹药毁伤目标产生既定终点效应的部分,在武器高效毁伤技术研究领域中一直占据重要地位。传统战斗部具有单一功能,很难实现对现代战争目标多样性打击的要求,多功能毁伤战斗部可以克服传统战斗部只具有专用或单一功能的缺点,能够实现穿、爆、燃以及多种模式复合制导精确打击目标,是当前战斗部技术的发展重点及未来发展方向。
2016年,美国国防威胁降低局提出开发、试验、验证高燃烧效率自破裂结构含能材料(SF-SRM)需求。该活性结构材料能在受到爆炸冲击时自行破裂成微米或亚微米尺寸燃料颗粒或液滴,这些颗粒或液滴会极快燃烧,从而显著增强燃烧效率。美国陆军武器与研发中心为“海尔法”导弹研发了综合毁伤效能战斗部,采用冷等静压-烧结-热等静压(CIP-Sinter-HIP,CHIP)工艺以及真空自耗熔炼工艺,制备钨锆合金,碎片攻击靶后目标,具有更强的引爆炸药的能力。德国为“矛”3、“强制者”导弹研发综合毁伤效能战斗部用TECAFINEPP、TECAM 6 MO等聚合物材料,使之能够打击人员、装甲、建筑物等多类目标;法国为中程导弹配备了综合效应战斗部,可对付坦克装甲,并具有破片杀伤效应。
纯铜材料密度高(Cu的密度为8.93g/cm3)、塑性好(室温伸长率≥45%)、声速大(4.7km/s)、熔点高(1083℃),同时材料成形性能好(塑性成形极限达到95%)、储藏丰富、价格便宜,能够满足常规武器战斗部的高性能与低成本要求。铜作为聚能装药战斗部用药型罩已有50多年的发展历史,现有98%破甲战斗部采用铜药型罩,试验研究表明,采用纯铜制造的药型罩,毁伤后效低,已不能满足新一代装备的发展需要。锆具有较高密度、高燃烧值及高活性等特点,由锆作为基体形成的锆基合金具有良好的穿甲、引燃、纵火功能,是具有高燃烧效应的金属元素。
发明内容
本发明解决的技术问题在于提供一种具有燃烧功能药型罩材料及其制备方法,使制备的铜合金材料与传统药型罩材料相比,在穿透靶板厚,能引燃靶后的柴油、青草等物质。
本发明的目的是这样实现的:
一种具有燃烧功能药型罩材料及其制备方法,原料为铜粉、锆粉和钽粉,采用粉末压坯烧结,所述烧结为固液复合烧结,所述固液复合烧结分为两个阶段,第一阶段烧结温度800~1080℃,保温时间1~2h;第二阶段烧结温度1100~1150℃,保温时间0.5~1h。
上述固液复合烧结前还包括预烧结,所述预烧结使在保护气氛下420~600℃条件下烧结2~4h,再随炉冷却至100℃以下出炉,获得预制坯料。
上述固液复合烧结包括径向热挤压变形,是将坯料加热到400~800℃挤压,挤压变形比≥3。
上述径向热挤压变形中在坯料表面涂抹润滑油,润滑剂可以油基石墨、石油硫酸钡涂料。
具体地,上述具有燃烧功能药型罩材料及其制备方法,包括以下步骤:
(1)粉末准备:采用电解铜粉(650~900目),雾化锆粉(325~540目),等离子球化钽粉(1000~1700目);
(2)混粉与压坯:将三种粉末混合均匀,进行压制坯料;
(3)预烧结:采用氮气气氛保护炉,在420~600℃条件下烧结2~4h,再随炉冷却至100℃以下出炉;
(4)固液复合烧结:将步骤(3)预制坯料进行固液复合烧结,采用高真空热处理炉,真空度≥1×10-3Pa,烧结温度800~1150℃,保温0.5~4h;
(5)径向热挤压变形:将步骤(4)所得坯料加热到400~800℃,在坯料表面涂一层润滑剂(将坯料加热到200℃时,在坯料表面涂抹润滑剂),在3600t卧式挤压机上进行挤压,挤压变形比≥3,通过车坯扒皮,锯切下料,制备出φ(30~70)×100mm棒坯;
(6)均匀化热处理:将步骤(5)所得棒坯进行除油与表面清理,放入氮气保护炉中进行再结晶热处理,热处理温度400~600℃,保温时间60~90min,进行水冷却处理,以获得均匀的组织。
所述步骤(1)中铜粉、锆粉、钽粉,为商业用粉末材料,纯度达到99.9%。
所述步骤(2)中一定成分配比,根据金属材料学、药型罩材料密度设计等确定三种成份配比。铜含量为70~80%、锆含量为15~20%,钽含量为5~10%,以质量百分比计。
所述步骤(5)中挤压变形比≥3,指铜坯料挤压前后直径比值的平方。
有益效果
本发明首先采用粉末冶金方法进行坯料准备,采用固液复合烧结方法,通过径向热挤压变形得到大塑性变形坯料,再进行均匀化热处理;本发明使Cu、Zr、Ta的三种成份均匀,提高三种组元的致密性、均匀性,提高组织的均匀性与性能一致性;获得均匀细晶组织。
本发明克服了商业用材料杂质含量高、组织不均、各向异性严重等等技术难题,同时可以根据药型罩结构设计与产品性能要求,进行材料组分设计,能够满足多样化产品和不同目标的使用要求。
(1)材料纯净度高。杂质元素含量≤0.1%。
(2)材料性能稳定。抗拉强度≥450MPa,伸长率≥30%。
(3)材料收得率高。收得率达到85%。
(4)材料晶粒组织细小。平均晶粒尺寸≤10μm。
附图说明
图1固液复合烧结坯料
图2径向挤压坯料
图3微观组织结构
具体实施方式
以下结合具体实施例对本发明作进一步说明。
实施例1
(1)粉末准备:采用商业电解铜粉(800目),雾化锆粉(400目),等离子球化钽粉(1340目),粉末纯度达到99.9%。
(2)混粉与压坯:按照一定成分配比(质量分数,如表1),将三种粉末混合均匀,进行压制出规格为φ100×120mm坯料。
表1铜合金粉末成份配比(wt.%)
粉末名称 | 铜粉 | 锆粉 | 钽粉 | 备注 |
质量分数 | 80% | 15% | 5% |
(3)预烧结:采用氮气气氛保护炉,在550℃条件下烧结2h,再随炉冷却至80℃出炉,获得一定强度的预制坯料。
(4)固液复合烧结:将步骤(3)预制坯料进行固液复合烧结,高真空热处理炉,在1300℃以下时真空度达到0.5×10-4Pa;固相烧结温度1000℃,保温时间2h;液相烧结温度1100℃,保温时间1h。得到坯料如图1所示。
(5)径向热挤压变形:将步骤(4)所得坯料加热到600℃,在坯料表面涂一层油基石墨润滑剂,在3600t卧式挤压机上进行挤压,挤压变形比4,通过车坯扒皮,锯切下料,制备出φ45棒坯(如图2)。
(6)均匀化热处理:将步骤(5)所得棒坯进行除油与表面清理,放入氮气保护炉中进行再结晶热处理,热处理温度500℃,保温时间75min,进行水冷却处理,合金成份如表2所示。
表2铜合金成份(wt.%)
成份 | 铜(Cu) | 锆(Zr) | 钽(Ta) | S、P、Pb、Bi、O、H等杂质元素 |
质量分数 | 79.61% | 15.33% | 5.06% | ≤0.1% |
将上述得到的铜合金坯料进行组织、密度、力学性能分析,采用金相显微分析法,平均晶粒尺寸5~8μm(图3);采用阿基米德排水法测试,平均密度8.58g/cm3,密度偏差≤2.45%;采用力学性能测试,室温抗拉强度472~496MPa,屈服强度346~365MPa,伸长率34~40%,断面收率65~68%。
将本发明方法制备的铜合金材料,制备成φ6×6mm的圆柱试样,在1500~2000m/s着速的碰撞试验条件下,能够引燃0#柴油、青草等物质;在密闭空间试验条件下,本发明方法制备的铜合金材料与纯铜材料相比,高速撞击后有明显的火焰;通过切削加工制备一定形状结构的药型罩,静破甲试验中钢靶表面有明显的烧蚀痕迹,形成浓烟。
实施例2
(1)粉末准备:采用商业电解铜粉(900目),雾化锆粉(500目),等离子球化钽粉(1700目),粉末纯度达到99.9%。
(2)混粉与压坯:按照一定成分配比(质量分数,如表3),将三种粉末混合均匀,进行压制出规格为φ100×120mm坯料。
表3铜合金粉末成份配比(wt.%)
(3)预烧结:采用氮气气氛保护炉,在600℃条件下烧结2h,再随炉冷却至80℃出炉,获得一定强度的预制坯料。
(4)固液复合烧结:将步骤(3)预制坯料进行固液复合烧结,高真空热处理炉,在1300℃以下时真空度达到0.5×10-4Pa;固相烧结温度1050℃,保温时间3h;液相烧结温度1150℃,保温时间1h,得到烧结坯料,。
(5)径向热挤压变形:将步骤(4)所得坯料加热到750℃,在坯料表面涂一层油基石墨润滑剂,在3600t卧式挤压机上进行挤压,挤压变形比3.29,通过车坯扒皮,锯切下料,制备出φ50棒坯。
(6)均匀化热处理:将步骤(5)所得棒坯进行除油与表面清理,放入氮气保护炉中进行再结晶热处理,热处理温度580℃,保温时间90min,进行水冷却处理,合金成份如表4所示。
表2铜合金成份(wt.%)
成份 | 铜(Cu) | 锆(Zr) | 钽(Ta) | S、P、Pb、Bi、O、H等杂质元素 |
质量分数 | 70.01% | 19.84% | 10.15% | ≤0.1% |
将上述得到的铜合金坯料进行组织、密度、力学性能分析,采用金相显微分析法,平均晶粒尺寸5~10μm;采用阿基米德排水法测试,平均密度7.89g/cm3,密度偏差≤2.86%;采用力学性能测试,室温抗拉强度498~532MPa,屈服强度386~420MPa,伸长率32~36%,断面收率55~62%。
将本发明方法制备的铜合金材料,制备成φ6×6mm的圆柱试样,在1500~2000m/s着速的碰撞试验条件下,能够引燃0#柴油、青草等物质;在密闭空间试验条件下,本发明方法制备的铜合金材料与纯铜材料相比,高速撞击后有明显的火焰;通过切削加工制备一定形状结构的药型罩,静破甲试验中钢靶表面有明显的烧蚀痕迹,形成浓烟。
Claims (5)
1.一种具有燃烧功能药型罩材料及其制备方法,原料为铜粉、锆粉和钽粉,采用粉末压坯烧结,所述烧结为固液复合烧结,所述固液复合烧结分为两个阶段,第一阶段烧结温度800~1080℃,保温时间1~2h;第二阶段烧结温度1100~1150℃,保温时间0.5~1h。
2.如权利要求1所述的具有燃烧功能药型罩材料及其制备方法,所述固液复合烧结前还包括预烧结,所述预烧结使在保护气氛下420~600℃条件下烧结2~4h,再随炉冷却至100℃以下出炉,获得预制坯料。
3.如权利要求1或2所述的具有燃烧功能药型罩材料及其制备方法,所述固液复合烧结包括径向热挤压变形,是将坯料加热到400~800℃挤压,挤压变形比≥3。
4.如权利要求3所述的具有燃烧功能药型罩材料及其制备方法,所述径向热挤压变形中在坯料表面涂抹润滑油,润滑剂可以油基石墨、石油硫酸钡涂料。
5.如权利要求1所述的具有燃烧功能药型罩材料及其制备方法,包括以下步骤:
(1)粉末准备:采用电解铜粉(650~900目),雾化锆粉(325~540目),等离子球化钽粉(1000~1700目);
(2)混粉与压坯:将三种粉末混合均匀,进行压制坯料;
(3)预烧结: 采用氮气气氛保护炉,在420~600℃条件下烧结2~4h,再随炉冷却至100℃以下出炉;
(4)固液复合烧结:将步骤(3)预制坯料进行固液复合烧结,采用高真空热处理炉,真空度≥1×10-3Pa,烧结温度800~1150℃,保温0.5~4h;
(5)径向热挤压变形:将步骤(4)所得坯料加热到400~800℃,在坯料表面涂一层润滑剂,在3600t卧式挤压机上进行挤压,挤压变形比≥3,通过车坯扒皮,锯切下料,制备出φ(30~70)×100mm棒坯;
(6)均匀化热处理:将步骤(5)所得棒坯进行除油与表面清理,放入氮气保护炉中进行再结晶热处理,热处理温度400~600℃,保温时间60~90min,进行水冷却处理,以获得均匀的组织。
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