DIY Stakes & Retuning Second-hand Hammers
自制窝砧与旧锤改造
标签：自制窝砧, 锤具改造, 热处理, 二手工具
窝砧可用轨道钢、叉车货叉或废轴料改制：截取 250–400 mm，气割出泪滴形或 T 形截面后磨平，工作面抛至 400 目以上，插进埋深 300 mm 的枫木或榆木墩使用。旧圆头锤改造性价比最高：重新打磨锤面曲率、边缘倒圆 2–3 mm，1045 钢头 820–850℃ 水淬、250℃ 回火至 HRC 48–52。欧洲金工圈常在旧货市场淘维多利亚时代的抬升锤，一把改好的锤换新柄成本不到新锤三分之一，锤面质量却常更好，磨改全程只需角磨机、砂带机与数显硬度计。
Make raising stakes from rail steel, forklift tines or scrap shafting: cut 250–400 mm lengths, flame-shape teardrop or T profiles, grind the working face to 400 grit or finer, and seat them in maple or elm stumps 300 mm deep. Retuned second-hand ball-peens are the best value: regrind face curvature, round the edges 2–3 mm, and heat-treat 1045 heads by water quenching from 820–850°C and tempering at 250°C to HRC 48–52. European smiths haunt flea markets for Victorian raising hammers — a reworked hammer with a new handle costs a third of new stock and often carries a better face; the whole job needs only an angle grinder, belt sander and a hardness tester.