difficult-to-machine material meaning in English

难加工材料

New perspectives on the cutting mechanism of difficult - to - machine materials
难加工材料切削机理研究的新进展
The cutting experiments for difficult - to - machine materials have shown that the cutting rate can be increased much more , the surface quality improved and the probability of wire - breaking reduced
对难加工材料的切割实验表明：复合工艺能较大幅度地提高加工效率，改善表面质量，降低断丝概率。
Compared with the existing rp methods using high energy density beams , the hpdm method solved the key problems of insufficient dimensional precision and surface quality caused by the step effect and no - supporting , and puts forward a new way to directly manufacture the difficult - to - machining materials parts with short - routine , low - cost and high quality
该技术解决了现有高能束熔积成形技术因无支撑和台阶效应造成的尺寸精度和表面质量不高的瓶颈问题，是难加工材料零件短流程、低成本、高质量无模精确制造的新的有效加工方法。