一、无镍铬钢汽车排气阀排气阀的头部为耐热钢,杆部为合金结构钢。过去我国沿用镍铬钢系,头部普遍采用4铬10硅2钼、3铬13镍7硅2、4铬14镍14钨2钼等,杆部用40铬。无产阶级文化大革命中,北京钢铁研究院、长春第一汽车厂、本溪钢厂广大革命职工,遵照毛主席关于“独立自主、自力更生”的伟大教导,研制成功了立足我国资源的65锰18铝 First, the nickel-chromium-free steel automotive exhaust valve exhaust valve head heat-resistant steel, rod for the alloy steel. In the past, the use of nickel-chromium steel system in our country, the head commonly used 4 chrome 10 silicon 2 molybdenum, 3 chrome 13 nickel 7 silicon 2,4 chrome 14 nickel 14 tungsten 2 molybdenum, with 40 chrome rod. In the great proletarian cultural revolution, a large number of revolutionary workers at Beijing Iron and Steel Research Institute, Changchun No. 1 Automobile Factory and Benxi Steel Plant, following Chairman Mao’s great teaching on “independence and self-reliance,” successfully developed 65 manganese 18 aluminum based on our resources