上世纪70年代，当中国工程师想研究涡轮盘样品时，西方国家不仅拒绝提供，甚至放言："他们造不出会飞的发动机"。 航空工业的 "心脏起搏器"：高温合金涡轮盘的前世今生 在飞机发动机里，有一个看似不起眼却至关重要的零件——高温合金涡轮盘。这个直径不到半米的金属圆盘，每分钟转速超过1万转，承受着700℃以上的高 温和相当于汽车轮胎气压200倍的应力。 一块直径1米的金属圆盘问世，长期对华禁运高温合金的某西方国家突然表示"考虑放宽出口限制"。 这种技术封锁源于高温合金的特殊属性。制造涡轮盘的镍基合金需要添加十几种稀有金属，通过精密铸造和热处理工艺形成定向晶或单晶结构，才能在极端 环境下保持稳定性。 美国从上世纪50年代开始研发，直到80年代才实现工业化生产，长期将相关技术列为"绝对机密"。中国早期只能依赖进口，不仅价格昂贵（每吨超过百万 元），而且交货周期长达数年，严重制约了国产大飞机和先进战机的研发进度。 30年磨一剑 面对西方的技术壁垒，中国科研人员选择了自主创新的艰难道路。从2000年开始，北京航空航天大学、西北工业大学等高校联合中航工业集团，启动了"高 温合金涡轮盘国产化"攻关项目。 他们首先在材料配方上取得突 ...

Core Viewpoint - Jiangsu Longda Superalloy Co., Ltd. has received an inquiry letter from the Shanghai Stock Exchange regarding its 2024 annual report, prompting the company to provide clarifications and corrections related to its financial disclosures and operational performance [1]. Financial Performance - The company reported significant revenue growth in the aerospace, gas turbine, and automotive turbocharger sectors, with increases of 46.64%, 67.34%, and 52.34% respectively [1]. - Other business revenues amounted to 85.724 million yuan [1]. - The company adjusted its financial data, ensuring that the corrections do not impact the overall financial status or cash flow for the years 2023 and 2024 [1]. Revenue Structure - The revenue structure for 2024 shows a notable increase in the aerospace sector, driven by demand from key domestic aerospace manufacturers [5]. - The gas turbine sector also experienced substantial growth, attributed to increased demand from domestic and international high-temperature alloy material service providers [9]. - The automotive turbocharger sector's revenue decreased from 16.08% in 2022 to 3.4% in 2024, indicating a shift in market dynamics [1]. Client Performance - The top five clients in the aerospace sector contributed significantly to revenue, with notable sales increases observed from key clients [6]. - The company’s sales to client one in the aerospace sector increased dramatically, reflecting a growing demand for domestic civil aviation engine materials [5]. - In the gas turbine sector, sales to client nine surged due to increased high-temperature alloy demand, highlighting the impact of domestic projects on revenue growth [9]. Sales Model Analysis - The company categorizes its sales into direct sales and dealer models, with direct sales representing end-user transactions and dealer sales involving trade merchants [3]. - Adjustments in sales models have been made to better reflect the operational realities and market conditions [3].