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问:HB5332《航空用GH99合金冷轧薄板技术条件》中规定的供应状态(固溶处理)的室温抗拉强度不得大于1130MPa,批生产有些炉批出现大于1130MPa,能否放宽?此外,经固溶加时效处理后,要求900℃,118MPa应力下,断裂时间不得小于23h,其依据如何? 答:GH99合金是我国冶金部和航空部有关院(所)和工厂在没有现成的技术资料的情况下,自行研制的时效强化型镍基板材高温合金。近10年来,GH99合金已成功地用于多种较先进型号的航空燃气涡轮发动机。其年产量正在逐步增加。
Q: At room temperature, the tensile strength at room temperature specified in the Technical Conditions of GH99 Alloy Cold Rolled Sheet for Aviation should not be more than 1130 MPa at room temperature. If some batch of batch production is greater than 1130 MPa, can it be relaxed? In addition, After the aging treatment of dissolving and aging, the breaking time should not be less than 23h under the stress of 900 ℃ and 118MPa, and the basis is how? A: The GH99 alloy is a kind of material that the metallurgical department and the aviation department of our country have no ready technical data Under the self-developed aging-enhanced nickel-based sheet metal superalloy. For nearly 10 years, GH99 alloy has been successfully used in many advanced aeronautical gas turbine engines. Its annual output is gradually increasing.