参数 GH3128 密度与拉伸参数：样件A（热轧）密度8.25 g/cm3，抗拉强度Rm 980 MPa，屈服σ0.2 680 MPa；样件B （锻件）密度8.28 g/cm3，Rm 1020 MPa，σ0.2 720 MPa；样件C（粉末冶金）密度8.22 g/cm3，Rm 950 MPa，σ0.2 660 MPa。 以上试验按 ASTM E8/E8M 与 GB/T 228.1 条件执行，密度对照常用 GB/T 标准测量。GH3128 在室温密度、常温 拉伸呈现上述分布，样件间微小密度偏差与凝固/变形致密度差异相关。（GH3128，GH3128，GH3128） 对比 技术争议：GH3128 采用铸锭—VAR/ESR+热轧路线与粉末冶金—热等静压路线，哪种更优？支持铸锭路线者认为 成本与大件成型更经济，支持粉末路线者强调均匀性与低缺陷有利于高温长期服役。实测显示：铸锭GH3128 在 大尺寸构件上易出现偏析而降低局部密度；粉末GH3128 在复杂件上致密度可控但单件成本上升。 工艺决策树：若构件尺寸>300mm且批量>100件→优先铸锭+锻/热轧→若要求高致密性且批量小→选择粉末冶金 +HIP→若服役温度>6 ...

（文章来源：每日经济新闻） 每经AI快讯，上大股份（301522.SZ）1月8日在投资者互动平台表示，在核工程领域，目前公司已成功 研制并交付核工程用高温合金GH3535、Inconel 718等多牌号产品，批量应用于国内部分三、四代核工 程项目。同时，公司经过长期研发和技术积累，部分产品已应用在可控核聚变、钍基熔盐堆等四代核技 术项目中。 ...

Core Insights - The company has successfully developed and delivered high-temperature alloys such as GH3535 and Inconel 718 for nuclear engineering applications, which are being used in domestic third and fourth-generation nuclear projects [2] - The company has a long-term research and technology accumulation, with some products already applied in advanced nuclear technologies like controlled nuclear fusion and thorium molten salt reactors [2] - The company plans to increase its research efforts in high-temperature alloys for nuclear applications and continue to expand its product applications in the nuclear power market [2]

Summary of High-Temperature Alloy Industry Conference Call Industry Overview - High-temperature alloys are critical materials for aerospace engines, enhancing oxidation and corrosion resistance through elements like chromium, cobalt, and molybdenum. The most widely used nickel-based high-temperature alloy is Inconel 718, utilized for manufacturing blades and disks [1][6]. - Single crystal high-temperature alloys exhibit strong heat resistance, primarily used for turbine blades and shrouds [1][7]. - In aerospace engines, forged high-temperature alloys account for the highest proportion (60%-70%), followed by cast high-temperature alloys (20%-30%) and powder high-temperature alloys (approximately 10%) [1][9][10]. Market Dynamics - Boeing's delivery volume has declined due to the 737 MAX incident and FAA restrictions, while Airbus's delivery volume, although not meeting expectations, continues to rise [1][12]. - The aerospace supply chain faces bottlenecks, including tight titanium supply (affected by the Russia-Ukraine war) and insufficient production capacity (equipment and personnel shortages) [1][13]. - High-temperature alloy production faces capacity constraints, with rising nickel prices and market dominance by major players like PCC and ITC [1][14]. Production Challenges - The production cycle for high-temperature alloy equipment from design to operation typically exceeds two years, involving equipment manufacturing, debugging, and certification [1][15]. - The expected resolution of supply-demand conflicts by 2028 is anticipated due to long-term agreements signed by international giants, promoting capacity investment [1][16]. Material Utilization Rates - The material yield from raw materials to components is relatively low, with casting processes yielding 30%-50% material utilization, and small parts yielding only 10%-20% [1][18][19]. - Powder metallurgy processes yield approximately 50%-60% powder recovery, but the final component yield can drop to 10%-20% due to machining losses [1][20]. Competitive Landscape - The international market is dominated by companies like APSHomekit, while the domestic market is led by firms such as Yingji and the Beijing Aeronautical Materials Research Institute [1][17]. - China has advantages in titanium alloys but faces significant competition from international giants in the high-temperature alloy sector [1][14]. Future Outlook - The supply chain issues affecting aircraft engine manufacturers like GE and Safran are primarily due to upstream supply constraints, with expectations for improvement by 2028 [1][21]. - The geopolitical landscape, including the Russia-Ukraine conflict and U.S.-China trade tensions, continues to impact resource availability and pricing [1][22][23]. Strategic Considerations - China's restrictions on rare earth exports significantly impact the high-temperature alloy and aerospace engine sectors, as these materials are crucial for single crystal blades [1][23]. - The industry is exploring alternatives to rare earth materials, including reducing their usage in high-temperature alloys and employing advanced cooling and coating technologies [1][24][25]. This summary encapsulates the key points discussed during the conference call, highlighting the current state and future prospects of the high-temperature alloy industry.