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前言 1978年鞍钢金属制品厂在全国定货会上和长拖、柳拖、本拖等四家拖拉机厂签订了82×53×30°×10、113×62×30°×8两种梯型管试制合同。这两种配合使用的梯型管,系用在28马力胶轮拖拉机前梁上。在使用梯型管前,该部件是用铸钢加工制成,但因结构欠合理,工艺复杂,材质缺陷较多,所以它影响主梁在大负荷及冲击载荷时的使用寿命。根据用户的要求和具体技术条件,鞍钢金属制品厂经过多次试验,终于用φ102×10、φ127×8的16Mn管坯通过两道次冷
Preface In 1978, Ansteel Metal Products Factory signed two types of ladder tubes of 82 × 53 × 30 ° × 10,113 × 62 × 30 ° × 8 at four national tractor factories, including Long Dragons, Liu Dragons and Ben Drag. Trial contract. Both types of ladder tubes are used on the front beam of a 28 hp rubber tractor. Before the use of ladder pipe, the parts are made of cast steel, but due to the structure is not reasonable, the process is complex, more material defects, it affects the main beam in the heavy load and impact load life. According to user’s requirements and specific technical conditions, Ansteel Metal Products Factory after several tests, and finally with φ102 × 10, φ127 × 8 16Mn tube through the two sub-cooling