一、前言C—103铌合金(名义成分Nb—10Hf—1Ti)是一种低强度高塑性并有良好焊接性能的合金。国外已实际用于制造液体火箭发动机喷管。我们通过一年多的试验表明,C—103铌合金的主要性能已达到国外同类合金的水平。目前能生产直径220毫米,高900毫米的铸锭;直径110毫米,长1200—1500毫米挤压棒以及各种规格的板材。现将板材的试验情况作一介绍。 I. Introduction C-103 niobium alloy (nominal composition Nb-10Hf-1Ti) is a low strength and high plasticity and good weldability of the alloy. Foreign countries have actually used to manufacture liquid rocket engine nozzle. Through more than a year of experiments, we have shown that the main properties of C-103 niobium alloy have reached the level of similar foreign alloys. At present it is capable of producing ingots 220 mm in diameter and 900 mm in height; 110 mm in diameter, 1200-1500 mm long extruded bars and plates of various sizes. The plate is now a test case for an introduction.