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US4431448A Tungsten-free hard alloy and process for producing same 失效
标题翻译：无钨硬质合金及其制造方法
公开(公告)号：US4431448A
公开(公告)日：1984-02-14
申请号：US314074
申请日：1981-10-09
申请人： Alexandr G. Merzhanov , Inna P. Borovinskaya , Lidia V. Kustova , Fedor I. Dubovitsky
发明人： Alexandr G. Merzhanov , Inna P. Borovinskaya , Lidia V. Kustova , Fedor I. Dubovitsky
IPC分类号： C22C1/05 , C22C29/00 , C22C29/02 , C22C29/14 , B22F3/16
CPC分类号： C22C1/058 , C22C1/051 , C22C29/02 , C22C29/14
摘要： A tungsten-free hard alloy consists of titanium diboride, titanium carbide and a binder. As the binder the tungsten-free hard alloy contains at least one of metals of subgroup IB of the periodic system inactive relative to boron or an alloy based on one of such metals. The components of the tungsten-free hard alloy are present in the following proportions, percent by mass:titanium diboride--40 to 60binder--3 to 30titanium carbide--the balance.The tungsten-free hard alloy of the above-specified composition has a porosity of below 1%.A process for producing a tungsten-free hard alloy comprises preparation of the starting charge by intermixing powders of titanium, boron and carbon, compression of the charge local ignition thereof to initiate the exothermal reaction of titanium with boron and carbon which further proceeds spontaneously under burning conditions being propagated through the charge at the account of the heat transfer from a heated layer of the charge to a cold one. At the stage of the charge preparation, into its composition there is added a powder of at least one of metals of subgroup IB of the periodic system inactive to boron or a powder of an alloy based on one of such metals, or added are powders of metals forming this alloy under the conditions of the above-mentioned exothermal reaction. On completion of the exothermal reaction the resulting solid-liquid reaction mass is compressed to obtain porosity of below 1%.
摘要翻译： PCT No.PCT / SU80 / 00133 Sec。 371日期1981年10月9日第 102（e）1981年10月9日PCT PCT 1980年7月31日PCT公布。公开号WO81 / 02431 日期：1981年9月3日。无钨硬质合金由二硼化钛，碳化钛和粘合剂组成。作为粘合剂，无钨的硬质合金含有周期性体系的IB族金属中的至少一种相对于硼而言是非活性的，或者基于这些金属之一的合金。无钨硬质合金的组分按以下比例存在：质量百分比：二硼化钛-40至60粘合剂 - 3至30碳化钛 - 余量。上述组成的无钨硬质合金的孔隙率低于1％。制造无钨硬质合金的方法包括通过混合钛，硼和碳的粉末来制备起始电荷，压缩其电荷局部点燃，引发钛与硼和碳的放热反应，其进一步在燃烧下自发进行考虑到从电荷的加热层到冷的传热的情况，条件通过电荷传播。在电荷制备阶段，在其组成中，加入至少一种对硼不活化的周期性体系的IB族金属或基于这些金属之一的合金粉末中的至少一种的金属，或加入的粉末是在上述放热反应的条件下形成该合金的金属。放热反应完成后，得到的固 - 液反应物质被压缩，得到的孔隙率低于1％。

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