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发明授权
CN106048413B 一种降低高性能耐热不锈钢材料链状碳化物的方法 有权

一种降低高性能耐热不锈钢材料链状碳化物的方法
摘要：
本发明公开了一种降低高性能耐热不锈钢材料链状碳化物的方法，该方法包括以下步骤：以重量百分比计，包括C：0.08%‑0.15%、Si：≤0.1%、Mn：0.35%~0.65%、P：≤0.015%、S：≤0.010%、Cr：10%~12%、Mo：0.1%‑0.4%、V：0.15%‑0.25%、Ni：0.3%~0.7%、Co：2.5%~3.5%、W：2.4%‑3.0%、Nb：0.05~0.12%、N：0.01%‑0.035%、B：0.01%‑0.025%、Al≤0.015%、以及余量Fe和不可避免的杂质；在一次冶炼时加入1‑1.5公斤/吨的稀土元素Zr，并浇注制得电极棒；将制得的电极棒进行电渣二次重熔，制得电渣钢锭；用制得的电渣锭装入加热炉，加热至1150‑1170℃，保温一定时间后出炉锻造，制成坯料；将制得坯料装入加热炉，加热至1150‑1170℃，保温一定时间后出炉锻造成材；通过本发明生产制得的耐热不锈钢材料组织均匀，从而较大的提高了合金材料的高温蠕变性能及疲劳寿命。
摘要（英）：

The invention discloses a method for reducing chain-shaped carbides of a high-performance and heat-resistant stainless steel material. The stainless steel material comprises the following components, in percentage by weight, 0.08-0.15% of C, not higher than 0.1% of Si, 0.35-0.65% of Mn, not higher than 0.015% of P, not higher than 0.010% of S, 10-12% of Cr, 0.1-0.4% of Mo, 0.15-0.25% of V, 0.3-0.7% of Ni, 2.5-3.5% of Co, 2.4-3.0% of W, 0.05-0.12% of Nb, 0.01-0.035% of N, 0.01-0.025% of B and not higher than 0.015% of Al, with the balance being Fe and inevitable impurities. The method for reducing the chain-shaped carbides of the high-performance and heat-resistant stainless steel material comprises the following steps of adding rare earth element Zr with a content of 1-1.5kg/t during primary melting and pouring to produce an electrode bar; conducting electroslag secondary remelting on the produced electrode bar to produce an electroslag steel ingot; putting the produced electroslag steel ingot into a heating furnace and heating to 1150-1170 DEG C, after keeping warm for a certain time, taking the electroslag steel ingot out of the heating furnace and forging to produce a blank; and putting the produced blank into the heating furnace and heating to 1150-1170 DEG C, after keeping warm for a certain time, taking the blank out of the heating furnace and forging to obtain the stainless steel material. The heat-resistant stainless steel material produced by the method is uniform in structure, so that the high temperature creep property and the fatigue life of the alloy material can be greatly improved.

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