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MB2镁合金P4模锻件原工艺采用挤压毛料模压,挤压前铸锭经400℃/20小时均匀化处理,随后在卧式挤压机挤成φ260毫米棒材,棒材经低倍断口检查合格后锯切成φ260×480毫米毛料,然后车皮成φ250×480毫米作为锻造毛坯。现场按正常工艺采用高温锻造和模压成形,结果模压件抗拉强度指标在230兆帕范围内波动,严重地降低了锻件的成品率和使用的可靠性。本试验主要目的是提高MB2合金模锻件的抗拉强度,要达到250兆帕以上;采用的主要措施是将MB2合金添加少量稀土元素钕,钕能细化
MB2 magnesium alloy P4 forging pieces of the original process of extrusion molding using extruded wool, before extrusion ingot 400 ° C / 20 hours uniform treatment, and then squeezed into horizontal φ260 mm bar in the horizontal extruder, rod through the low-fold fracture inspection Qualified after sawing φ260 × 480 mm wool, and then the car into φ250 × 480 mm forging rough. The scene by the normal process using high temperature forging and molding, the results of tensile strength of molded parts within the range of 230 MPa fluctuation, severely reduced the forging yield and reliability. The main purpose of this test is to increase the tensile strength of MB2 alloy die forgings, to reach 250 MPa above; the main measure used is to add a small amount of rare earth neodymium, MB2 alloy, neodymium can be refined