3线材品质对预应力制品的影响3.1线材组织缺陷的影响(1)线材索氏体化率低或珠光体片间距过大。当线材索氏体化率低或珠光体片间距过大时,导致线材的可拉拔极限降低(指线材在拉拔过程中,中心不产生裂纹的最大总压缩率),同时也会使线材及其制品的强塑性较差。如Φ5.5 mm,75#钢,拉 3 wire quality prestressed products 3.1 The impact of wire defects (1) wire sorbite rate or pearlite film spacing is too large. When the wire sorbite rate is low or pearlite piece spacing is too large, resulting in lower wire drawing limit (wire drawing process, the center does not produce cracks in the maximum total compression rate), but also make the wire Strong plasticity and its products are poor. Such as Φ5.5 mm, 75 # steel, pull