鋼中含有元素銅,其壓力加工性能和含銅量有很大的關系。當銅質量分數大於4.5%時,鍛造易出現分裂;當銅質量分數小於3.5%時,其壓力加工性能喲很大改善。鍛造時應充分熱透,短打時要清錘塊大,變形量小;然後可重錘,加大變形量。
該鋼經固溶處理後,硬度為300—350HBS;經固溶處理加時效處理以後,硬度為380——420HBS,在此硬度下可以進行切削加工。
| C | Mn | Si | Cr | Ni | Cu | Nb | S | P |
| ≤0.7 | <1.0 | <1.0 | 15.0~17.0 | 3.-~5.0 | 2.5~3.5 | 0.2~0。4 | ≤0.03 | ≤0.03 |
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